APW7137 데이터 시트보기 (PDF) - Anpec Electronics
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APW7137 Datasheet PDF : 18 Pages
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APW7137
Pin Description
PIN.
NO
NAME
1
LX
2
GND
3
FB
4
EN
5
VIN
FUNCTION
Switch pin. Connect this pin to inductor/diode here.
Power and signal ground pin.
Feedback Input. The device senses feedback voltage via FB and regulate the voltage at 1.23V.
Connecting FB with a resistor-divider from the output that sets the output voltage in the range from
VIN to 30V.
Enable Control Input. Forcing this pin above 1.0V enables the device. Forcing this pin below 0.4V to
shut it down. In shutdown, all functions are disabled to decrease the supply current below 1µA. Do
not left this pin floating.
Main Supply Pin. Must be closely decoupled to GND with a 2.2µF or greater ceramic capacitor.
Block Diagram
VIN
EN
UVLO
Gate Driver
LX
Control Logic
Over-Temperature
Protection
Slop
Compensation
Current
Limit
Σ
Current Sense
Amplifier
GND
Oscillator
ICMP
COMP
Error
Amplifier
FB
EAMP
VREF
1.23V
Soft-Start
Copyright © ANPEC Electronics Corp.
10
Rev. A.4 - Oct., 2008
www.anpec.com.tw
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