当前位置：文档库 › TPS61040DBVRG4中文资料

TPS61040DBVRG4中文资料

FEATURES

DESCRIPTION

APPLICATIONS

DBV PACKAGE (Top View)

SW GND FB

V IN

GND SW V IN

NC EN

214

56DRV PACKAGE (Top View)

TYPICAL APPLICATION

L1D1

V OUT

V IN to 28 V

V IN

1.8 V to 6.0 V

C 4.7 μ70727476

78808284868890

0.10

110100

E f f i c i e n c y - %

EFFICIENCY

OUTPUT CURRENT

I O - Output Current - mA

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

https://www.wendangku.net/doc/db19017238.html,

LOW-POWER DC/DC BOOST CONVERTER IN SOT-23AND SON PACKAGES

? 1.8-V to 6-V Input Voltage Range

The TPS61040/41is a high-frequency boost converter dedicated for small to medium LCD bias ?Adjustable Output Voltage Range up to 28V supply and white LED backlight supplies.The device ?400-mA (TPS61040)and 250-mA (TPS61041)is ideal to generate output voltages up to 28V from a Internal Switch Current

dual cell NiMH/NiCd or a single cell Li-Ion battery.?Up to 1-MHz Switching Frequency

The part can also be used to generate standard 3.3-V/5-V to 12-V power conversions.

?28-μA Typical No-Load Quiescent Current ?1-μA Typical Shutdown Current The TPS61040/41operates with a switching frequency up to 1MHz.This allows the use of small ?Internal Soft Start

external components using ceramic as well as ?

Available in SOT23-5and 2×2×0.8-mm SON tantalum output capacitors.Together with the thin Packages

SON package,the TPS61040/41gives a very small overall solution size.The TPS61040has an internal 400mA switch current limit,while the TPS61041has ?LCD Bias Supply

a 250-mA switch current limit,offering lower output voltage ripple and allows the use of a smaller form ?White-LED Supply for LCD Backlights factor inductor for lower power applications.The low ?Digital Still Camera

quiescent current (typically 28μA)together with an ?PDAs,Organizers,and Handheld PCs optimized control scheme,allows device operation at ?Cellular Phones

very high efficiencies over the entire load current range.

?Internet Audio Player

Standard 3.3-V/5-V to 12-V Conversion

Please be aware that an important notice concerning availability,standard warranty,and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

https://www.wendangku.net/doc/db19017238.html,

VIN

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

These devices have limited built-in ESD protection.The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

ORDERING INFORMATION

(1)

SWITCH CURRENT

PACKAGE T A

PART NUMBER PACKAGE LIMIT,mA

MARKING TPS61040DBV

400SOT23-5PHOI TPS61041DBV 250SOT23-5PHPI –40°C to 85°C

TPS61040DRV 400SON-62×2CCL TPS61041DRV

250

SON-62×2

CAW

(1)

The devices are available in tape and reel and in tubes.Add R suffix to the part number (e.g.,TPS61040DRVR)to order quantities of 3000parts in tape and reel or add suffix T (e.g.,TPS61040DRVT)to order a tube with 250pieces..

FUNCTIONAL BLOCK DIAGRAM

2Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

DETAILED DESCRIPTION OPERATION

PEAK CURRENT CONTROL

I peak(typ)+I LIM)V IN

100ns

I peak(typ)+400mA)V IN

100ns for the TPS61040

I peak(typ)+250mA)V IN

100ns for the TPS61041

(1)

TPS61040

TPS61041

SLVS413C–OCTOBER2002–REVISED AUGUST2007 Table1.Terminal Functions

TERMINAL

I/O DESCRIPTION

NAME DBV NO.DRV NO.

This is the enable pin of the device.Pulling this pin to ground forces the device into shutdown

EN43I mode reducing the supply current to less than1μA.This pin should not be left floating and needs

to be terminated.

This is the feedback pin of the device.Connect this pin to the external voltage divider to program FB34I

the desired output voltage.

GND21–Ground

NC–5–No connection

Connect the inductor and the Schottky diode to this pin.This is the switch pin and is connected to SW16I

the drain of the internal power MOSFET.

V IN52I Supply voltage pin

The TPS61040/41operates with an input voltage range of1.8V to6V and can generate output voltages up to 28V.The device operates in a pulse-frequency-modulation(PFM)scheme with constant peak current control. This control scheme maintains high efficiency over the entire load current range,and with a switching frequency up to1MHz,the device enables the use of very small external components.

The converter monitors the output voltage,and as soon as the feedback voltage falls below the reference voltage of typically1.233V,the internal switch turns on and the current ramps up.The switch turns off as soon as the inductor current reaches the internally set peak current of typically400mA(TPS61040)or250mA(TPS61041). See the Peak Current Control section for more information.The second criteria that turns off the switch is the maximum on-time of6μs(typical).This is just to limit the maximum on-time of the converter to cover for extreme conditions.As the switch is turned off the external Schottky diode is forward biased delivering the current to the output.The switch remains off for a minimum of400ns(typical),or until the feedback voltage drops below the reference voltage https://www.wendangku.net/doc/db19017238.html,ing this PFM peak current control scheme the converter operates in discontinuous conduction mode(DCM)where the switching frequency depends on the output current,which results in very high efficiency over the entire load current range.This regulation scheme is inherently stable,allowing a wider selection range for the inductor and output capacitor.

The internal switch turns on until the inductor current reaches the typical dc current limit(I LIM)of400mA (TPS61040)or250mA(TPS61042).Due to the internal propagation delay of typical100ns,theactualcurrent exceeds the dc current limit threshold by a small amount.The typical peak current limit can be calculated:

The higher the input voltage and the lower the inductor value,the greater the peak.

By selecting the TPS61040or TPS61041,it is possible to tailor the design to the specific application current limit requirements.A lower current limit supports applications requiring lower output power and allows the use of an inductor with a lower current rating and a smaller form factor.A lower current limit usually has a lower output voltage ripple as well.

https://www.wendangku.net/doc/db19017238.html,

SOFT START

The TPS61040/41limits this inrush current by increasing the current limit in two steps starting from I LIM

for 256

cycles to

I LIM

2for the next 256cycles,and then full current limit (see Figure 14).

ENABLE

UNDERVOLTAGE LOCKOUT

ABSOLUTE MAXIMUM RATINGS

DISSIPATION RATING TABLE

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

All inductive step-up converters exhibit high inrush current during start-up if no special precaution is made.This can cause voltage drops at the input rail during start up and may result in an unwanted or early system shut down.

Pulling the enable (EN)to ground shuts down the device reducing the shutdown current to 1μA (typical).Because there is a conductive path from the input to the output through the inductor and Schottky diode,the output voltage is equal to the input voltage during shutdown.The enable pin needs to be terminated and should not be left https://www.wendangku.net/doc/db19017238.html,ing a small external transistor disconnects the input from the output during shutdown as shown in Figure 18.

An undervoltage lockout prevents misoperation of the device at input voltages below typical 1.5V.When the input voltage is below the undervoltage threshold,the main switch is turned off.

over operating free-air temperature (unless otherwise noted)

(1)

UNIT Supply voltages on pin V IN (2)–0.3V to 7V Voltages on pins EN,FB

(2)–0.3V to V IN +0.3V

Switch voltage on pin SW

(2)

30V

Continuous power dissipation See Dissipation Rating Table

T J Operating junction temperature –40°C to 150°C T stg

Storage temperature

–65°C to 150°C

Lead temperature (soldering 10seconds)

260°C

(1)Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device.These are stress ratings only,and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied.Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.(2)

All voltage values are with respect to network ground terminal.

DERATING T A ≤25°C FACTOR T A =70°C T A =85°C PACKAGE R θJA POWER RATING

ABOVE POWER RATING

POWER RATING

T A =25°C DBV 250°C/W 357mW 3.5mW/°C 192mW 140mW DRV

76°C/W

1300mW

13mW/°C

688mW

500mW

4Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

RECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS

TPS61040

TPS61041 SLVS413C–OCTOBER2002–REVISED AUGUST2007

MIN TYP MAX UNIT

V IN Input voltage range 1.86V

V OUT Output voltage range28V

L Inductor(1) 2.210μH

f Switchin

g frequency(1)1MHz

C IN Input capacitor(1) 4.7μF

C OUT Output capacitor(1)1μF

T A Operating ambient temperature–4085°C

T J Operating junction temperature–40125°C (1)See application section for further information.

V IN=2.4V,EN=V IN,T A=–40°C to85°C,typical values are at T A=25°C(unless otherwise noted)

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT

V IN Input voltage range 1.86V

I Q Operating quiescent current I OUT=0mA,not switching,V FB=1.3V2850μA

I SD Shutdown current EN=GND0.11μA

V UVLO Under-voltage lockout threshold 1.5 1.7V ENABLE

V IH EN high level input voltage 1.3V

V IL EN low level input voltage0.4V

I I EN input leakage current EN=GND or V IN0.11μA POWER SWITCH AND CURRENT LIMIT

Vsw Maximum switch voltage30V

t off Minimum off time250400550ns

t on Maximum on time467.5μs

R DS(on)MOSFET on-resistance V IN=2.4V;I SW=200mA;TPS610406001000m?

R DS(on)MOSFET on-resistance V IN=2.4V;I SW=200mA;TPS610417501250m?MOSFET leakage current V SW=28V110μA

I LIM MOSFET current limit TPS61040350400450mA

I LIM MOSFET current limit TPS61041215250285mA OUTPUT

V OUT Adjustable output voltage range V IN28V

V ref Internal voltage reference 1.233V

I FB Feedback input bias current V FB=1.3V1μA

V FB Feedback trip point voltage 1.8V≤V IN≤6V 1.208 1.233 1.258V

1.8V≤V IN≤6V;V OUT=18V;I load=10mA;

Line regulation(1)0.05%/V

C FF=not connected

Load regulation(1)V IN=2.4V;V OUT=18V;0mA≤I OUT≤30mA0.15%/mA (1)The line and load regulation depend on the external component selection.See the application section for further information.

https://www.wendangku.net/doc/db19017238.html,

TYPICAL CHARACTERISTICS

7072747678808284

8688900.10

110100

E f f i c i e n c y - %

I O - Output Current - mA

7072747678808284

8688900.10

110100

E f f i c i e n c y - %

I L - Load Current - mA

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

Table 2.Table of Graphs

FIGURE

vs Load current 1,2,3ηEfficiency vs Input voltage

4I Q Quiescent current vs Input voltage and temperature 5V FB Feedback voltage vs Temperature 6I SW Switch current limit vs Temperature

7vs Supply voltage,TPS610418I CL Switch current limit vs Supply voltage,TPS610409vs Temperature 10R DS(on)

R DS(on)

vs Supply voltage

11Line transient response 12Load transient response 13Start-up behavior

EFFICIENCY

OUTPUT CURRENT

LOAD CURRENT

Figure 1.Figure 2.

6Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

7072747678808284

8688900.10

110100

E f f i c i e n c y - %

I L - Load Current - mA

123456

E f f i c i e n c y - %

V I - Input Voltage - V

- F e e d b a c k V o l t a g e - V

V F B T A - Temperature - °C

Q u i e s c e n t C u r r e n t - A

μV I - Input Voltage - V

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

EFFICIENCY

LOAD CURRENT INPUT VOLTAGE

Figure 3.

Figure 4.

TPS61040

QUIESCENT CURRENT

FEEDBACK VOLTAGE

Figure 5.

Figure 6.

https://www.wendangku.net/doc/db19017238.html,

T A - Temperature - °C

I (S W )- S w i t c h C u r r e n t L i m i t - m A

- C u r r e n t L i m i t - m A

I (C L ) V CC - Supply Voltage - V

?r D S (o n )

? S t a t i c D r a i n -S o u r c e O n -S t a t e R e s i s t a n c e ? m T

A ? Temperature ? °C

- C u r r e n t L i m i t - m A

I (C L ) V CC - Supply Voltage - V

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

TPS61040/41

TPS61041SWITCH CURRENT LIMIT

CURRENT LIMIT

FREE-AIR TEMPERATURE SUPPLY VOLTAGE

Figure 7.Figure 8.

TPS61040TPS61040/41

CURRENT LIMIT

STATIC DRAIN-SOURCE ON-STATE RESISTANCE

SUPPLY VOLTAGE

FREE-AIR TEMPERATURE

Figure 9.

Figure 10.

8Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

V I

2.4 V to

3.4 V

V O

100 mV/div 200 μS/div

V O = 18 V

r D S (o n )? S t a t i c D r a i n -S o u r c e O n -S t a t e R e s i s t a n c e ? m V CC ? Supply Voltage ? V

V O 5 V/div EN 1 V/div

I I

50 mA/div

V O = 18 V

V O

1 mA to 10 mA

200 μS/div

V O

100 mA/div

V O = 18 V

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

TPS61040/41

STATIC DRAIN-SOURCE ON-STATE RESISTANCE

Figure 11.

Figure 12.Line Transient Response

Figure 13.Load Transient Tresponse Figure 14.Start-Up Behavior

https://www.wendangku.net/doc/db19017238.html,

APPLICATION INFORMATION

INDUCTOR SELECTION,MAXIMUM LOAD CURRENT

fS max +

V IN(min) (V OUT *V IN)

I P L V OUT (2)

fS ǒ

I load ǔ

+2 I load (V OUT *V IN )Vd)

I 2P L

(3)

I load max +h I 2P L fS max

2 (V OUT *V

IN)(4)

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

Because the PFM peak current control scheme is inherently stable,the inductor value does not affect the stability of the regulator.The selection of the inductor together with the nominal load current,input and output voltage of the application determines the switching frequency of the converter.Depending on the application,inductor values between 2.2μH and 47μH are recommended.The maximum inductor value is determined by the maximum on time of the switch,typically 6μs.The peak current limit of 400mA/250mA (typically)should be reached within this 6-μs period for proper operation.

The inductor value determines the maximum switching frequency of the converter.Therefore,select the inductor value that ensures the maximum switching frequency at the converter maximum load current is not exceeded.The maximum switching frequency is calculated by the following formula:

Where:

I P =Peak current as described in the Peak Current Control section L =Selected inductor value

V IN(min)=The highest switching frequency occurs at the minimum input voltage

If the selected inductor value does not exceed the maximum switching frequency of the converter,the next step

is to calculate the switching frequency at the nominal load current using the following formula:

Where:

I P =Peak current as described in the Peak Current Control section L =Selected inductor value I load =Nominal load current

Vd =Rectifier diode forward voltage (typically 0.3V)

A smaller inductor value gives a higher converter switching frequency,but lowers the efficiency.

The inductor value has less effect on the maximum available load current and is only of secondary order.The

best way to calculate the maximum available load current under certain operating conditions is to estimate the expected converter efficiency at the maximum load current.This number can be taken out of the efficiency graphs shown in Figure 1through Figure 4.The maximum load current can then be estimated as follows:

Where:

I P =Peak current as described in the Peak Current Control section L =Selected inductor value

fS max =Maximum switching frequency as calculated previously η=Expected converter efficiency.Typically 70%to 85%

10Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

SETTING THE OUTPUT VOLTAGE

V OUT+1.233Vǒ1)R1R2ǔ(5)

C FF+1

2p fS

20R1

(6)

TPS61040

TPS61041

SLVS413C–OCTOBER2002–REVISED AUGUST2007

The maximum load current of the conveter is the current at the operation point where the coverter starts to enter the continuous conduction https://www.wendangku.net/doc/db19017238.html,ually the converter should always operate in discontinuous conduction mode.

Last,the selected inductor should have a saturation current that meets the maximum peak current of the converter(as calculated in the Peak Current Control section).Use the maximum value for I LIM for this calculation. Another important inductor parameter is the dc resistance.The lower the dc resistance,the higher the efficiency of the converter.See Table3and the typical applications for the inductor selection.

Table3.Recommended Inductor for Typical LCD Bias Supply(see Figure15)

DEVICE INDUCTOR VALUE COMPONENT SUPPLIER COMMENTS

10μH Sumida CR32-100High efficiency

10μH Sumida CDRH3D16-100High efficiency

TPS6104010μH Murata LQH4C100K04High efficiency

4.7μH Sumida CDRH3D16-4R7Small solution size

4.7μH Murata LQH3C4R7M24Small solution size

High efficiency

TPS6104110μH Murata LQH3C100K24

Small solution size

The output voltage is calculated as:

For battery-powered applications,a high-impedance voltage divider should be used with a typical value for R2of ≤200k?and a maximum value for R1of2.2M?.Smaller values might be used to reduce the noise sensitivity of the feedback pin.

A feedforward capacitor across the upper feedback resistor R1is required to provide sufficient overdrive for the error comparator.Without a feedforward capacitor,or one whose value is too small,the TPS61040/41shows double pulses or a pulse burst instead of single pulses at the switch node(SW),causing higher output voltage ripple.If this higher output voltage ripple is acceptable,the feedforward capacitor can be left out.

The lower the switching frequency of the converter,the larger the feedforward capacitor value required.A good starting point is to use a10-pF feedforward capacitor.As a first estimation,the required value for the feedforward capacitor at the operation point can also be calculated using the following formula:

Where:

R1=Upper resistor of voltage divider

fS=Switching frequency of the converter at the nominal load current(See the INDUCTOR SELECTION, MAXIMUM LOAD CURRENT section for calculating the switching frequency)

C FF=Choose a value that comes closest to the result of the calculation

https://www.wendangku.net/doc/db19017238.html, LINE AND LOAD REGULATION

OUTPUT CAPACITOR SELECTION

D V out+I out

C outǒ1fS(Iout)–I P L

Vout)Vd–Vinǔ)I P ESR(7)

TPS61040

TPS61041

SLVS413C–OCTOBER2002–REVISED AUGUST2007

The larger the feedforward capacitor the worse the line regulation of the device.Therefore,when concern for line regulation is paramount,the selected feedforward capacitor should be as small as possible.See the LINE AND LOAD REGULATION section for more information about line and load regulation.

The line regulation of the TPS61040/41depends on the voltage ripple on the feedback https://www.wendangku.net/doc/db19017238.html,ually a50mV peak-to-peak voltage ripple on the feedback pin FB gives good results.

Some applications require a very tight line regulation and can only allow a small change in output voltage over a certain input voltage range.If no feedforward capacitor C FF is used across the upper resistor of the voltage feedback divider,the device has the best line regulation.Without the feedforward capacitor the output voltage ripple is higher because the TPS61040/41shows output voltage bursts instead of single pulses on the switch pin (SW),increasing the output voltage ripple.Increasing the output capacitor value reduces the output voltage ripple.

If a larger output capacitor value is not an option,a feedforward capacitor C FF can be used as described in the previous section.The use of a feedforward capacitor increases the amount of voltage ripple present on the feedback pin(FB).The greater the voltage ripple on the feedback pin(≥50mV),the worse the line regulation. There are two ways to improve the line regulation further:

https://www.wendangku.net/doc/db19017238.html,e a smaller inductor value to increase the switching frequency which will lower the output voltage ripple,

as well as the voltage ripple on the feedback pin.

2.Add a small capacitor from the feedback pin(FB)to ground to reduce the voltage ripple on the feedback pin

down to50mV again.As a starting point,the same capacitor value as selected for the feedforward capacitor

C FF can be used.

For best output voltage filtering,a low ESR output capacitor is recommended.Ceramic capacitors have a low ESR value but tantalum capacitors can be used as well,depending on the application.

Assuming the converter does not show double pulses or pulse bursts on the switch node(SW),the output voltage ripple can be calculated as:

where:

I P=Peak current as described in the Peak Current Control section

L=Selected inductor value

I out=Nominal load current

fS(I out)=Switching frequency at the nominal load current as calculated previously

Vd=Rectifier diode forward voltage(typically0.3V)

C out=Selected output capacitor

ESR=Output capacitor ESR value

See Table4and the typical applications section for choosing the output capacitor.

Table4.Recommended Input and Output Capacitors

DEVICE CAPACITOR VOLTAGE RATING COMPONENT SUPPLIER COMMENTS

4.7μF/X5R/0805 6.3V Tayo Yuden JMK212BY475MG C IN/C OUT

10μF/X5R/0805 6.3V Tayo Yuden JMK212BJ106MG C IN/C OUT TPS61040/411μF/X7R/120625V Tayo Yuden TMK316BJ105KL C OUT

1μF/X5R/120635V Tayo Yuden GMK316BJ105KL C OUT

4.7μF/X5R/121025V Tayo Yuden TMK325BJ475MG C OUT

12Submit Documentation Feedback Copyright?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

INPUT CAPACITOR SELECTION

DIODE SELECTION

LAYOUT CONSIDERATIONS

V O

V IN C TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

For good input voltage filtering,low ESR ceramic capacitors are recommended.A 4.7μF ceramic input capacitor is sufficient for most of the applications.For better input voltage filtering this value can be increased.See Table 4and typical applications for input capacitor recommendations.

To achieve high efficiency a Schottky diode should be used.The current rating of the diode should meet the peak current rating of the converter as it is calculated in the Peak Current Control https://www.wendangku.net/doc/db19017238.html,e the maximum value for I LIM for this calculation.See Table 5and the typical applications for the selection of the Schottky diode.

Table 5.Recommended Schottky Diode for Typical LCD Bias Supply (see Figure 15)

DEVICE

REVERSE VOLTAGE

COMPONENT SUPPLIER COMMENTS

30V

ON Semiconductor MBR053020V ON Semiconductor MBR0520TPS61040/41

20V ON Semiconductor MBRM120L

High efficiency 30V

Toshiba CRS02

Typical for all switching power supplies,the layout is an important step in the design;especially at high peak currents and switching frequencies.If the layout is not carefully done,the regulator might show noise problems and duty cycle jitter.

The input capacitor should be placed as close as possible to the input pin for good input voltage filtering.The inductor and diode should be placed as close as possible to the switch pin to minimize the noise coupling into other circuits.Because the feedback pin and network is a high-impedance circuit,the feedback network should be routed away from the inductor.The feedback pin and feedback network should be shielded with a ground plane or trace to minimize noise coupling into this circuit.

Wide traces should be used for connections in bold as shown in Figure 15.A star ground connection or ground plane minimizes ground shifts and noise.

Figure https://www.wendangku.net/doc/db19017238.html,yout Diagram

https://www.wendangku.net/doc/db19017238.html,

L1D1

V OUT 18 V

V IN

1.8 V to 6 V

C14.7 μF

L1:Sumida CR32-100D1:Motorola MBR0530

C1:Tayo Yuden JMK212BY475MG C2:

Tayo Yuden TMK316BJ105KL

L1D1

V IN

1.8 V to 6 V

4.7 DAC or Analog Voltage 0 V = 25 V 1.233 V = 18 V Sumida CR32-100Motorola MBR0530

Tayo Yuden JMK212BY475MG C2:

Tayo Yuden GMK316BJ105KL

V OUT

18 V / 10 mA

V IN

1.8 V to 6 V

4.7 μR3200 k W

μF Sumida CR32-100Motorola MBR0530

Tayo Yuden JMK212BY475MG Tayo Yuden TMK316BJ105KL

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

Figure 16.LCD Bias Supply

Figure 17.LCD Bias Supply With Adjustable Output Voltage

Figure 18.LCD Bias Supply With Load Disconnect

14Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

https://www.wendangku.net/doc/db19017238.html,

V IN = 2.7 V to 5 V

4.7 μF

V2 = -10 V/15 mA

Murata LQH4C6R8M04

Motorola MBR0530

Tayo Yuden JMK212BY475MG

Tayo Yuden EMK316BJ105KF

V O=12 V/35 mA

V IN 3.3 V

10 μL1:Murata LQH4C6R8M04

D1:Motorola MBR0530

C1:Tayo Yuden JMK212BJ106MG

C2:Tayo Yuden EMK316BJ475ML

μF

5 V/45 mA

1.8 V to 4 V

4.7

L1:Murata LQH4C3R3M04

D1:Motorola MBR0530

C1, C2:Tayo Yuden JMK212BY475MG

TPS61040

TPS61041

SLVS413C–OCTOBER2002–REVISED AUGUST2007 Figure19.Positive and Negative Output LCD Bias Supply

Figure20.Standard3.3-V to12-V Supply

Figure21.Dual Battery Cell to5-V/50-mA Conversion

Efficiency Approx.Equals84%at V IN=2.4V to Vo=5V/45mA

https://www.wendangku.net/doc/db19017238.html,

L1V CC

PWM

100 Hz to 500 Hz

L1:Murata LQH4C100K04D1:Motorola MBR0530

C1:Tayo Yuden JMK212BY475MG C2:

Tayo Yuden TMK316BJ105KL

L1D1

MBRM120L

4.7 μV CC = 2.7 V to 6 V

0 V ? Iled = 20 mA

L1:Murata LQH4C3R3M04D1:Motorola MBR0530

C1:Tayo Yuden JMK212BY475MG C2:Standard Ceramic Capacitor

TPS61040TPS61041

SLVS413C–OCTOBER 2002–REVISED AUGUST 2007

Figure 22.White LED Supply With Adjustable Brightness Control

Using a PWM Signal on the Enable Pin,Efficiency Approx.Equals 86%at V IN =3V,I LED =15mA

A smaller output capacitor value for C2causes a larger LED ripple.

Figure 23.White LED Supply With Adjustable Brightness Control

Using an Analog Signal on the Feedback Pin

16Submit Documentation Feedback Copyright ?2002–2007,Texas Instruments Incorporated

PACKAGING INFORMATION

Orderable Device Status (1)Package Type Package Drawing Pins Package Qty Eco Plan (2)

Lead/Ball Finish MSL Peak Temp (3)TPS61040DBVR ACTIVE SOT-23DBV 53000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TPS61040DBVRG4ACTIVE SOT-23DBV 53000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TPS61040DRVR PREVIEW SON DRV 63000

TBD

Call TI Call TI

TPS61041DBVR ACTIVE SOT-23DBV 53000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TPS61041DBVRG4ACTIVE SOT-23DBV 53000Green (RoHS &

no Sb/Br)CU NIPDAU Level-1-260C-UNLIM TPS61041DRVR PREVIEW SON DRV 53000TBD Call TI Call TI TPS61041DRVT

PREVIEW

SON

DRV

250

TBD

Call TI

(1)

The marketing status values are defined as follows:ACTIVE:Product device recommended for new designs.

LIFEBUY:TI has announced that the device will be discontinued,and a lifetime-buy period is in effect.

NRND:Not recommended for new designs.Device is in production to support existing customers,but TI does not recommend using this part in a new design.

PREVIEW:Device has been announced but is not in production.Samples may or may not be available.OBSOLETE:TI has discontinued the production of the device.

(2)

Eco Plan -The planned eco-friendly classification:Pb-Free (RoHS),Pb-Free (RoHS Exempt),or Green (RoHS &no Sb/Br)-please check https://www.wendangku.net/doc/db19017238.html,/productcontent for the latest availability information and additional product content details.TBD:The Pb-Free/Green conversion plan has not been defined.

Pb-Free (RoHS):TI's terms "Lead-Free"or "Pb-Free"mean semiconductor products that are compatible with the current RoHS requirements for all 6substances,including the requirement that lead not exceed 0.1%by weight in homogeneous materials.Where designed to be soldered at high temperatures,TI Pb-Free products are suitable for use in specified lead-free processes.

Pb-Free (RoHS Exempt):This component has a RoHS exemption for either 1)lead-based flip-chip solder bumps used between the die and package,or 2)lead-based die adhesive used between the die and leadframe.The component is otherwise considered Pb-Free (RoHS compatible)as defined above.

Green (RoHS &no Sb/Br):TI defines "Green"to mean Pb-Free (RoHS compatible),and free of Bromine (Br)and Antimony (Sb)based flame retardants (Br or

Sb do not exceed 0.1%by weight in homogeneous material)

(3)

MSL,Peak Temp.--The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications,and peak solder temperature.

Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.TI bases its knowledge and belief on information provided by third parties,and makes no representation or warranty as to the accuracy of such information.Efforts are underway to better integrate information from third parties.TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.TI and TI suppliers consider certain information to be proprietary,and thus CAS numbers and other limited information may not be available for release.

In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s)at issue in this document sold by TI to Customer on an annual basis.

PACKAGE OPTION ADDENDUM

https://www.wendangku.net/doc/db19017238.html,

15-Oct-2007

TAPE AND REEL BOX

INFORMATION

Device

Package Pins Site

Reel Diameter (mm)Reel Width (mm)A0(mm)B0(mm)K0(mm)

P1(mm)W (mm)Pin1Quadrant TPS61040DBVR DBV 5SITE 481798 3.2 3.2 1.448Q3TPS61041DBVR

DBV

SITE 48

179

3.2

1.4

https://www.wendangku.net/doc/db19017238.html,

5-Oct-2007

Device

Package Pins Site Length (mm)

Width (mm)Height (mm)

TPS61040DBVR DBV 5SITE 48195.0200.045.0TPS61041DBVR

DBV

SITE 48

195.0

200.0

45.0

https://www.wendangku.net/doc/db19017238.html,

5-Oct-2007