AP2001

Monolithic Dual Channel PWM Controller

This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of

this product. No rights under any patent accompany the sale of the product.

Rev. 0.3 Feb 20, 2004

1/8

Features

- Dual PWM Control Circuitry

- Operating voltage can be up to 50V

- Adjustable Dead Time Control (DTC)

- Under voltage Lockout (UVLO) Protection

- Short Circuit Protection (SCP)

- Variable Oscillator Frequency...... 500Khz Max

- 2.5V voltage reference Output

- 16-pin PDIP and SOP packages

Applications

- Backlight inverter

- DC/DC converts in computers, etc.

General Description

The AP2001 integrates Pulse-width-Modulation

(PWM) control circuit into a single chip, mainly

designs for power-supply regulator. All the functions

included an on-chip 2.5V reference output, two

error amplifiers, an adjustable oscillator, two

dead-time comparators, UVLO, SCP, DTC circuitry,

and dual common-emitter(CE) output transistor

circuit.

Recommend the output CE transistors as pre-driver

for Driving externally. The DTC can provide from

0% to 100%. Switching frequency can be

adjustable by trimming RT and CT. During low VCC

situation, the UVLO makes sure that the outputs

are off until the internal circuit is operational

normally.

Pin Assignments

1

2

3

15

14

13

12

11

10

9

8

7

6

5

4

16

CT

EA2+

EA2-

FB2

DTC2

OUT2

VCC

GND

OUT1

DTC1

FB1

EA1+

RT

REF

SCP

EA1-

( Top View )

PDIP/SOP

Pin Descriptions

Name

Description

CT

Timing Capacitor

RT

Timing Resistor

EA+

Error Amplifier Input(+)

EA -

Error Amplifier Input(-)

FB

Feedback Loop Compensation

DTC

Dead Time Control

OUT

Pre-driver Output

GND

Ground

VCC

Supply Voltage

SCP

Short Circuit Protection

REF

Voltage Reference