High Performance Current Mode PWM Controller

AP3842/3/4/5

Anachip Corp.

www.anachip.com.tw

Rev.1.0 Oct.11, 2004

2/8

S/R

5V

REF

T

S

R

R

2R

1V

CURRENT

SENSE

COMPARATOR

PWM

LATCH

8

6

OUTPUT

VREF

5V 50mA

INTERNAL

BIAS

VREF GOOD

LOGIC

2.50V

OSC.

ERROR AMP.

2

1

3

4

5

7

Vi

GROUND

RT/CT

VFB

COMP

CURRENT

SENSE

16V

AP384X

UVLO

36V

Absolute Maximum Ratings

Symbol

Parameter

Value

Unit

Supply Voltage (low impedance source)

36

V

Supply Voltage (li < 30mA)

Self Limiting

Output Current

±0.7

A

Output Energy (capacitive load)

5

µJ

Analog Inputs (pins2,3)

-0.3 to 5.5

V

Error Amplifier Output Sink Current

10

mA

1.25

W

800

mW

Storage Temperature Range

-65 to 150

Lead Temperature (soldering 10s)

260

*Notes: 1. All voltages are with respect to pin 5, all currents are positive into the specified terminal.

Electrical Characteristics

AP384X

Symbol

Parameter

Test Conditions

Min. Typ. Max.

Unit

REFERENCE SECTION

Output Voltage

Tj = 25

4.90 5.00 5.10

V

Line Regulation

2

20

mV

Load Regulation

3

25

mV

Temperature Stability

(Notes 2)

0.2

0.4 mV/

Total Output Variation

Line, Load, Temperature (Notes 2) 4.82

5.18

V

Output Noise Voltage

10Hz≦f≦10KHz Tj=25

2)

50

µV

Long Term Stability

5

25

mV

Output Short Circuit current

-85

-120

mA