AP494 View Datasheet(PDF) - Anachip Corporation

Part Name

Description

Manufacturer

AP494

Voltage Mode PWM Controller

Anachip Corporation 

Voltage Mode PWM Controller

AP494

„ Functional Block Diagram

RT 6

CT 5

DTC 4 ~~0.1V

Oscillator

Dead-Time Control

Comparator

1 IN + 1

1 IN - 2

Error Amplifier 1

+

-

PWM

Comparator

Error Amplifier 2

2 IN + 16

+

2 IN - 15

-

OUTPUT CTRL

(see Function Table)

13

1D

C1

Pulse-Steering

Flip-Flop

Reference

Regulator

FEEDBACK 3

0.7mA

Q1

8

C1

9

E1

Q2 11 C2

10

E2

12

Vcc

14

REF

7

GND

„ Absolute Maximum Ratings

Rating

Power Supply Voltage

Collector Output Voltage

Collector Output Current (Each transistor)

Amplifier Input Voltage Range

Power Dissipation @ TA≦45oC

Thermal Resistance, Junction-to-Ambient

Operating Junction Temperature

Storage Temperature Range

Operating Ambient Temperature Range

Derating Ambient Temperature

Symbol

VCC

VC1, VC2

IC1, IC2

VIR

PD

RΘJA

TJ

Tstg

TA

TA

Value

40

40

250

-0.3 to +40

1000

80

125

-55 to +125

0 to +70

45

Unit

V

V

mA

V

mW

oC/W

oC

oC

oC

oC

„ Recommended Operating Conditions

Characteristics

Power Supply Voltage

Collector Output Voltage

Collector Output Current (Each transistor)

Amplified Input Voltage

Current Into Feedback Terminal

Reference Output Current

Timing Resistor

Timing Capacitor

Oscillator Frequency

Symbol

VCC

VC1,VC2

IC1,IC2

Vin

Ifb

Iref

RT

CT

fOSC

Min

7.0

-

-

-0.3

-

-

1.8

0.0047

1.0

Typ

15

30

-

-

-

-

30

0.001

40

Max

40

40

200

VCC-2.0

0.3

10

500

10

200

Unit

V

V

mA

V

mA

mA

kΩ

µF

kHz

Anachip Corp.

www.anachip.com.tw

Rev.1.0 Oct 11, 2004

2/9

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