AP3041

Document number: DS41887 Rev. 2 - 2

3 of 14

www.diodes.com

August 2019

© Diodes Incorporated

AP3041

Pin Descriptions

Pin Number

Pin Name

Function

1

CT

Capacitor Setting Shut Down Delay Time

2

OV

Over Output Voltage Protection Pin

3

UVLO

Two resistors connected from this pin to GND and the power supply respectively is used to

set start-up and shutdown level.

4

EN

Enable Pin

5

VIN

Input supply pin. This pin must be locally bypassed.

6

VCC

This pin should be bypassed to GND with a ceramic capacitor.

7

OUT

Connect this pin to the gate of external MOSFET, the gate driver has 1A peak current

capability.

8

GND

Ground

9

FAULT

This pin can be used to drive the external MOSFET. The logic of the driver signal is

controlled by that of PWM pin and the signal phase of them is the same. This pin is pulled to

ground under fault condition of OVP, UVLO, OTP, diode short circuit and LED short circuit.

10

RT

An external resistor connected from this pin to GND is used to set the operating frequency.

11

CS

Sense switch current pin, which is used for current mode control and for current limit. The

current limit voltage is 500mV.

12

SC

Slope compensation for current sense. A resistor between SC and GND will program the

slope compensation.

13

SS/COMP

An external soft-start time capacitor is placed from this pin to GND and is charged by an

internal 20

μA current source to control regulator soft-start time.

Compensation pin. This pin is the output of the internal error amplifier.

14

FB

Voltage feedback pin. The reference voltage is 500mV.

15

PWM

This pin can be connected to current matched chip and receives error signal used to shut

down the system.

16

FLAG

Fault condition output pin. When the output is in short circuit condition, the FLAG outputs

logic low to shut down the power path. Please refer to the application circuit.