S7AH-07A1A0中文资料
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? https://www.wendangku.net/doc/361264733.html,
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-3.3 V/7 A Output
?
Non-Isolated ? Remote On/Off ? Fixed Frequency ? Input Under Voltage Lockout ? High Efficiency ? OCP/SCP
? High Power Density ? Wide Range Trim ? Low Cost
Description
The Bel x7AH-07A1A0 modules are a series of non-isolated, step down dc/dc converters that operate from a nominal 12 V source. These converters are available in a range of output voltages from 0.9 V to 3.3 V. It is packaged in a compact, overmolded package rated at 7 A. Optional lead forming provides a vertical mount product for minimal footprint or a surface mount option for a very low profile. The output is closely regulated and the efficiency is typically 88% for 3.3 V output at full load. Typical features include remote on/off, input under voltage lockout, over current protection and short circuit protection.
Part Selection
Output Voltage Input Voltage Max. Output Current Max. Output Power Typical Efficiency Part Number Surface Mount Part Number Vertical Mount 0.9 V -3.3 V
12 V
7 A
23.1 W
88%
S7AH-07A1A0
V7AH-07A1A0
Note: Add “0” suffix at the end of the model number to indicate “Tube Packaging”, and “R” for “Reel
Packaging”, and “G” for “Tray Packaging”.
Absolute Maximum Ratings
Parameter
Min Typ Max Notes
Input Voltage (continuous)
-0.3 V - 15 V Output Enable Terminal Voltage -0.3 V - 14 V Ambient Temperature -40 °C - 85 °C Storage Temperature
-55 °C
-
125 °C
Input Specifications
Parameter
Min Typ Max Notes
Input Voltage 10 V - 14 V Input Current (no load) - - 100 mA Input Current (full load)
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V
- - - - - - - - - - - - 3.0 A 2.6 A 1.9 A 1.6 A 1.3 A 1.0 A Remote Off Input Current
- 3 mA 10 mA
x7AH-07A1A0 Series
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? https://www.wendangku.net/doc/361264733.html,
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-3.3 V/7 A Output
Input Specifications (continued)
Parameter
Min Typ Max Notes
Input Reflected Ripple Current (pk-pk) - 180 mA - Input Reflected Ripple Current (rms) - 50 mA - Tested with simulated source impedance of 500 nH, 5 Hz to 20 MHz and two 270 uF/16 V Oscon capacitors with ESR=0.018 ohm max. at 100 kHz
I 2
t Inrush Current Transient - 0.01 A 2
s 0.02 A 2
s
Turn on Voltage Threshold - 9.5 V - Turn off Voltage Threshold
-
9.0 V
9.5 V
Output Specifications
Parameter
Min Typ Max Notes
Output Voltage Set Point
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V
3.247 V 2.460 V 1.771 V 1.476 V 1.181 V 0.886 V
3.3 V 2.5 V 1.8V 1.5 V 1.2 V 0.9 V 3.353 V 2.540 V 1.829 V 1.524 V 1.219 V 0.914 V Test conditions:
Vin=12 V, Io=50% full load
Line Regulation -
±3mV ±6mV
Load Regulation
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V
- - - - - - ±5 mV ±5 mV ±5 mV ±3 mV ±3 mV ±3mV ±10 mV ±10 mV ±10 mV ±6 mV ±6 mV ±6mV
Regulation Over Temperature (-40 °C to +85 °C) -
30 mV
50 mV
Output Current
0 A - 7 A
Current Limit Threshold
10 A - 20 A
Short Circuit Surge Transient - 0.02 A 2s 0.04 A 2
s
Ripple and Noise (rms)
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V
-
- - - - - 20 mV 20 mV
15 mV
15 mV 15 mV 10mV 50 mV 50 mV 40 mV 40 mV
30 mV 30mV
Ripple and Noise (pk-pk)
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V
- - - - - - 70 mV 70 mV 60 mV 60 mV 60 mV 50mV
100 mV 100 mV 100 mV 80 mV 80 mV 70mV
Test condition: 0-20 MHz BW,
with a 330 uF/10 V Tantalum
capacitor at the output.
Turn on Time
- 8 mS 20 mS Overshoot at Turn on - 0% 3% Output Capacitance 330 uF - 2800 uF
Transient Response
Overshoot - 120 mV 180 mV 50% ~ 100% Max Load Settling Time - 50 uS 80 uS Overshoot - 120 mV 180 mV 100% ~ 50%
Max Load Settling Time All
- 50 uS 80 uS
Test conditions:
di/dt = 0.5 A/uS; Vin = 12 V;
with a 330 uF/10 V Tantalum capacitor at the output. Note: All specifications are typical at nominal input, full load at 25 °C unless otherwise stated.
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? https://www.wendangku.net/doc/361264733.html,
NON-ISOLATED DC/DC CONVERTERS
12 V Input
0.9 V-3.3 V/7 A Output
General Specifications
Parameter
Min Typ Max Notes
Efficiency
V O =3.3 V V O =2.5 V V O =1.8 V V O =1.5 V V O =1.2 V V O =0.9 V 85% 83% 80% 78% 75% 71% 88% 86% 83% 81% 78% 74% - - - - - - Measured at Vin=12 V, full load and Ta=25 °C
Switching Frequency
250 kHz
300 kHz
350 kHz
Output Trim Range (wide trim) - - 403% Vo V O =0.9 V Output Trim Range (narrow trim)
V O =1.2 V-3.3 V
V O =0.9 V 90% Vo
-
- -
110% Vo 110% Vo
MTBF
8,202,646 hours
Calculated Per Bell Core TR-332 (Vin=12 V; Vo=3.3 V; I O = 5.6 A; T a = 25°C)
Dimensions (surface mount)
Inches (L × W × H) Millimeters (L × W × H)
0.78 x 0.70 x 0.32 19.81 x 17.78 x 8.13
Dimensions (vertical)
Inches (L × W × H) Millimeters (L × W × H)
0.70 x 0.308 x 0.65 17.78 x 7.82 x 16.51
Weight - 5 g -
Control Specifications
Parameter
Min
Typ
Max
Notes
Remote On/Off Signal Low (Unit Off) -0.3 V - 1 V Signal High (Unit On)
3.5 V
-
14 V
Remote on/off pin open, unit on.
Output Trim Equations
Equations for calculating the trim resistor (in k ?) given the desired adjusted voltage (Vadj) and the nominal output voltage of the converter (Vnom) are shown below. The Trim Up resistor should be connected between the Trim pin and Ground.
05.106
.6??=nom
adj trimup
V V R
Note: Output voltage Vo=0.9 V when R trimup is not connected.
Modul e Vout
Tri m
GND
u p
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? https://www.wendangku.net/doc/361264733.html,
NON-ISOLATED DC/DC CONVERTERS
12 V Input 0.9 V-3.3 V/7 A Output
Efficiency Data
MODULE 3.3 V
60.0%
70.0%80.0%90.0%100.0%0.7
1.75
3.5
5.25
7
OUTPUT CURRENT (A)
E F F I C I E N C Y
10.0 V 12.0 V 14.0 V
MODULE 1.8 V
65.0%
70.0%75.0%80.0%85.0%90.0%0.7
1.75
3.5
5.25
7
OUTPUT CURRENT (A)
E F F I C I E N C Y
10.0 V 12.0 V 14.0 V
MODULE 0.9 V
60.0%
65.0%70.0%75.0%80.0%0.70
1.75
3.50
5.25
7.00
OUTPUT CURRENT (A)
E F F I C I E N C Y
10.0 V 12.0 V 14.0 V
NON-ISOLATED DC/DC CONVERTERS
12 V Input 0.9 V-3.3 V/7 A Output
Vo=0.9 V-2.5 V
Vo=3.3 V
Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 ? Tel 201-432-0463 ? Fax 201-432-9542 ? https://www.wendangku.net/doc/361264733.html,
2005 Bel Fuse Inc. Specifications subject to change without notice. 040605
EAST EUROPE
CORPORATE FAR
Bel Fuse Inc. Bel Fuse Ltd. Bel Fuse Europe Ltd.
206 Van Vorst Street 8F/ 8 Luk Hop Street Preston Technology Management Centre Jersey City, NJ 07302 San Po Kong Marsh Lane, Suite G7, Preston
Tel 201-432-0463 Kowloon, Hong Kong Lancashire, PR1 8UD, U.K.
Fax 201-432-9542 Tel 852-2328-5515 Tel 44-1772-556601
https://www.wendangku.net/doc/361264733.html, Fax 852-2352-3706 Fax 44-1772-888366
https://www.wendangku.net/doc/361264733.html, https://www.wendangku.net/doc/361264733.html,