KA3502 Datasheet

IC型號：
KA3502
PDF描述：
PC SMPS Supervisory IC
文件大?。?/label>
91.95KB
PDF頁數(shù)：
14頁
芯片廠家：
FAIRCHILD

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KA3502

PC SMPS Supervisory IC

Features

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Complete Housekeeping Circuit

Few External Components

Over Voltage Protection for 3.3V/5V/12V/Adj. Output

Over Current Protection for 3.3V/5V/12V Output

Open-Collector Output and Remote On/Off Function

Remote On/Off Delay Time Control

Precision Voltage Reference for Outputs, 5V/12V

Uncommitment Precision Voltage Reference for +5Vs

Power Good Signal Generator with Hysteresis

Disable Logic of 3.3V, 5V, 12V for Complete Shutdown

Descriptions

The KA3502 is complete housekeeping circuitry for use in

the secondary side of SMPS(Switched Mode Power Supply).

It contains various functions, which are two Precision Volt-

age References, Over Voltage/Current Protection, Remote

On/Off Control, Power Good Signal Generator, Disable

Logic and etc.

20-DIP

Internal Block Diagram

V33 V5 V12

1 2 3

PWM FB1 VREF1 UV

14 11

6 15

VCC

Vcc

Adj 4

1.26V

COMP1

Ion

R10

39k

Ichg

R15

5.1k

10k

R13

Vcc

5.2V

COMP9

Tsur 17

2.7V

IS5 19

50mV

IS33 20

135mV

IS12 18

Vcc

COMP2

Vcc

COMP3

Vcc

- + - COMP4

65mV

Vcc

S Vcc

REFERENCE1

+ COMP7

Vcc

COMP8

R12

2V鈫?.3V

COMP5

Vcc

COMP6

1.4V

Ion+

Ioff

2.8V

2V鈫?.7V

R11

5.4k

FB2

1.28V鈫?.24V

VREF2

R14

REFERENCE2

REM

Trem

GND

Topr

Rev. 5.0

漏2000 Fairchild Semiconductor International

制造商
Fairchild Semiconductor
監(jiān)測電壓數(shù)
4
監(jiān)測電壓
3.3 V, 5 V, 12 V, Adjustable
過電壓閾值
4.2 V, 6.4 V, 15 V, Adjustable
人工復(fù)位
Not Resettable
監(jiān)視器
No Watchdog
Supply Voltage - Max
24 V
Supply Voltage - Min
15 V
最大功率耗散
1000 mW
最大工作溫度
+ 70 C
安裝風(fēng)格
Through Hole
封裝 / 箱體
DIP-20
最小工作溫度
0 C

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