KA3846 Datasheet

IC型號：
KA3846
PDF描述：
SMPS Controller
文件大小：
69.62KB
PDF頁數(shù)：
10頁
芯片廠家：
FAIRCHILD

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KA3846

SMPS Controller

Features

鈥?Automatic Feed Forward Compensation

鈥?Programmable Pulse by Pulse Current Limiting

鈥?Automatic Symmetry Correction in Push-Pull

Configuration

鈥?Enhanced Load Response Characteristics

鈥?Parallel Operation Capability for Modulator Power

Systems

鈥?Differential Current Sense Amplifier with Common Mode

Range

鈥?Double Pulse Suppression

鈥?200mA Totem-Pole Outputs

鈥?/div>

鹵2%

Band gap Reference

鈥?Under-Voltage Lockout

鈥?Soft-Start Capability

鈥?Shutdown Terminal

鈥?500KHz Operation

Description

The KA3846 control IC provides all of the necessary fea-

tures to implement fixed frequency, current mode control

schemes while maintaining a minimum external parts count.

The superior performance of this technique can be measured

in improved line regulation, enhanced load response char-

acteristics, and a simpler, easier-to-design control loop.

Topological advantages include inherent pulse-by-pulse cur-

rent limiting capability, automatic symmetry correction for

push-pull converters, and the ability to parallel 鈥減ower

module

while maintaining equal current sharing. Protection

circuitry includes built-in-under-voltage lockout and pro-

grammable current limit in addition to soft-start capability.

A shutdown function is also available which can initiate

either a complete shutdown with automatic restart or latch

the supply off. Other features include fully latched operation,

double pulse suppression, deadtime adjust capability, and

鹵2% trimmed bandgap reference. The KA3846 features low

outputs in the OFF state.

16-DIP

Internal Block Diagram

Rev. 5.0

漏2000 Fairchild Semiconductor International

標(biāo)準(zhǔn)包裝
1,500
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 切換控制器
系列
-
PWM 型
電流模式
輸出數(shù)
2
頻率 - 最大
500kHz
占空比
-
電源電壓
7.7 V ~ 40 V
降壓
無
升壓
無
回掃
無
反相
無
倍增器
無
除法器
無
Cuk
無
隔離
無
工作溫度
0°C ~ 70°C
封裝/外殼
16-DIP（0.300"，7.62mm）
包裝
管件

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