AX4102 查看數據表（PDF） - Unspecified
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AX4102 Datasheet PDF : 9 Pages
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授权代理商：深圳市四海恒通科技有限公司
电话：0755-8398 3377 135 9011 2223
http://www.gofotech.com
AX4102
Example:
ISW = (0.13mA x 1.5K + 0.08)/ 0.055= 5A (VIN=12V)
ISW = (0.13mA x 2.7K + 0.08)/ 0.080= 5.39A (VIN=5V)
Setting the Output Voltage
Application circuit item shows the basic application circuit with AX4102 adjustable
output version. The external resistor sets the output voltage according to the following
equation:
V OUT
=
0.8V
×
⎜⎛1 +
⎝
R1
R2
⎟⎞
⎠
Table 1 Resistor select for output voltage setting
VOUT
R2
R1
1.3K
6.8K
5V
5.6K
30K
1.5K
4.7K
3.3V
5.6K
18K
2.2K
4.7K
2.5V
5.6K
12K
1.8V
2K
2.5K
1.5V
2.2K
2.0K
1.2V
3K
1.5K
1.0V
3K
0.75K
R2 setting 5.6k that System Operation Current (No load) can be reducing to under 4mA.
VIN>+9V
C2 C3
470uF 0.1uF
R4
100K
R3
1.5K
ON/OFF
C6
0.1uF
AX4102
1 FB
VSS 8
2 EN
VSS 7
3 OCSET SW 6
4 VCC
SW 5
L1
1
2
22uH
R1
D1
30K
B340
R2
5.6K
VOUT = 5V/3.5A
C1
1nF
C8
C4
0.1uF 470uF
5/9
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.6 Aug.06, 2010
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