APW7179 查看數據表（PDF） - Anpec Electronics
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APW7179 Datasheet PDF : 16 Pages
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APW7179
Pin Description
PIN
NO.
NAME
1
IN2
2
SW2
3
GND2
4
FB1
5, 11
NC
6
EN1
7
IN1
8
SW1
9
GND1
10
FB2
12
EN2
Exposed
Pad
NC
FUNCTION
Channel 2 Supply Input. Bypass to the GND2 with a 4.7µF or greater ceramic capacitor.
Channel 2 Power Switch Output. Inductor connection to drains of the internal PMOSFET and NMOSFET
switches.
Ground 2. Connected the exposed pad to the GND2.
Channel 1 Feedback Input. Connect FB1 to the center point of the external resistor divider. The
feedback voltage is 0.6V.
No Internal Connection.
Channel 1 Enable Control Input. Drive EN1 above 1V to turn on the Channel 1. Drive EN1 below 0.4V to
turn it off. In shutdown situation, all functions are disabled to decrease the supply current below 1µA.
Don’t left this pin floating.
Channel 1 Supply Input. Bypass to the GND1 with a 4.7µF or greater ceramic capacitor.
Channel 1 Power Switch Output. Inductor connection to drains of the internal PMOSFET and NMOSFET
switches.
Ground 1. Connected the exposed pad to the GND1.
Channel 2 Feedback Input. Connect FB2 to the center point of the external resistor divider. The
feedback voltage is 0.6V.
Channel 2 Enable Control Input. Drive EN2 above 1V to turn on the Channel 2. Drive EN2 below 0.4V to
turn it off. In shutdown situation, all functions are disabled to decrease the supply current below 1µA.
Don’t left this pin floating.
No Internal Connection. Connecting this pad to GND1 and GND2.
Block Diagram
EN1/EN2
Shutdown
Control
Over-
Temperature
Protection
Oscillator
Logic Control
Current
Limit
∑
ICMP
COMP
EAMP
Gate
Driver
Soft-
start
VREF
0.6V
Diagram Represents 1/2 of the APW7179
Copyright © ANPEC Electronics Corp.
6
Rev. A.1 - Mar., 2011
IN1/IN2
SW1/SW2
GND1/GND2
FB1/FB2
www.anpec.com.tw
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