Datasheet > KA3504

KA3504

更新时间： 2024-11-19 22:47:43

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		开关监控 PC
页数	文件大小	规格书
12页	209K
描述
PC SMPS Supervisory IC

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中文翻译

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数据手册
替代型号

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KA3504 数据手册

www.fairchildsemi.com

KA3504

PC SMPS Supervisory IC

Features

Description

• PC Power Supply Output Monitor Circuitry

• Few External Components

• Over Voltage Protection for 3.3V/5V/12V Output

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

Delay Time

• Fault Protection Output With Open Collector Output

• Power Supply on/off Delay Time Control (PSON)

• Power Good Signal Generator With Hysteresis

• Open Collector PG Output

The KA3504 is complete output supervisory circuitry

intended for use in the secondary side of the switched mode

power supply. It provides all the functions necessary to

monitor and control the output of the power supply system.

Power good signal generator, Remote on and off control,

some precision protection features against over-voltage and

over-current are implemented. It directly senses all the

output rails for OVP without any external dividers. As for

output control, power good output (PGO) and Fault

Protection output (FPO) are also included. Utilizing a

minimum number of external components, the KA3504

offers a simple and cost effective solution, greatly reducing

PCB board space for power supply system.

• 300ms Power Good Delay

• Current Sense Setting Function With RI

• Latch Function Controlled by PSON and Protection Input

• 16-Pin Dual In-line Package

OCP (Over Current Protection)

It has precision OCP functions for +3.3V, +5V, +12V

outputs. The block is made up of three comparators with

current source setting function. Two inputs of each OCP

comparator are connected to both sides of output inductor

that is located in the secondary output of SMPS.

FPO (Fault Protection Output)

Fault Protection Output indicates the fault condition as

protection signal. When fault state occurs, the main power is

to be turned-off and the PGO signal goes LOW.

NORMAL = "LOW", FAULT = "HIGH"

OVP (Over Voltage Protection)

PGO (Power Good Output)

It has OVP functions for +3.3V, +5V, +12V outputs.

The circuit is made up of a comparator with three detecting

inputs.

Power Good Signal Generator is to monitor the voltage level

of power supply for safe operation of a microprocessor

having some delay time at turn-on. The delay time is

prorammed by a timing capacitor connected to TPG pin of

KA3504. The power good output should be low state before

the output voltage is out of regulation at turn-off.

NORMAL = "HIGH", FAULT = "LOW"

Remote ON/OFF

Remote on/off section is used to control SMPS externally.

If a high signal is supplied to the remote on/off input, FPO

signal becomes a high state and all secondary outputs are

grounded. The remote on/off signal is transferred with some

on-delay and off-delay time of 8ms, 24ms respectively with

0.1µF external capacitor.

16-DIP

Rev. 1.0.1

12 3 4 5 6 7...12

中文翻译

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KA3504 替代型号

型号	品牌	替代类型	描述	数据表
KA3505	FAIRCHILD	类似代替	PC SMPS Supervisory IC
FAN7687AN	FAIRCHILD	功能相似	PC Power Supply Output Monitoring IC
FAN7687AMX	FAIRCHILD	功能相似	PC Power Supply Output Monitoring IC

与KA3504相关器件

型号	品牌	获取价格	描述	数据表
KA3505	FAIRCHILD	获取价格	PC SMPS Supervisory IC
KA350H	SAMSUNG	获取价格	Adjustable Positive Standard Regulator, 1.2V Min, 33V Max, BIPolar, PSFM3, TO-3P, 3 PIN
KA350H	FAIRCHILD	获取价格	Adjustable Positive Standard Regulator, 1.2V Min, 33V Max, BIPolar, PSFM3, TO-3P, 3 PIN
KA350T	SAMSUNG	获取价格	Regulator, 1 Output, BIPolar,
KA350TU	FAIRCHILD	获取价格	Adjustable Positive Standard Regulator, 1.2V Min, 33V Max, BIPolar, PSFM3, TO-220, 3 PIN
KA350TU	ROCHESTER	获取价格	1.2 V-33V ADJUSTABLE POSITIVE REGULATOR, PSFM3, TO-220, 3 PIN
KA3511	FAIRCHILD	获取价格	PC POWER SUPPLY DESIGN WITH KA3511
KA3511AS	FAIRCHILD	获取价格	Switching Controller, Voltage-mode, 0.2A, 10kHz Switching Freq-Max, BIPolar, PDIP24, SDIP-
KA3511BS	FAIRCHILD	获取价格	Intelligent Voltage Mode PWM IC
KA3511CS	FAIRCHILD	获取价格	Switching Controller, Voltage-mode, 0.2A, 10kHz Switching Freq-Max, PDIP24, SDIP-24

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