Datasheet > AZ3843M

AZ3843M

更新时间： 2024-11-07 03:20:03

品牌	Logo	应用领域
AAT		控制器
页数	文件大小	规格书
13页	336K
描述
CURRENT MODE PWM CONTROLLER

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AZ3843M 数据手册

Data Sheet

AZ3842/3/4/5

Advanced Analog Circuits

CURRENT MODE PWM CONTROLLER

General Description

Features

The AZ3842/3/4/5 are high performance fixed fre-

quency current-mode PWM controller series.

Robust V

Line/Load Regulation

REF

Low Line Regulation : 4mV

Low Load Regulation : 4mV

These integrated circuits are optimized for off-line and

DC-DC converter applications with minimum external

components. They feature under-voltage lockout

(UVLO) circuit for low start-up current, trimmed

oscillator for precise duty cycle control, current sense

comparator providing maximum current limiting and a

totem pole output stage for increasing output current.

In addition, these ICs also feature accurate protection

against over-temperature, over-current and maximal

output power.

High Stability of Reference Voltage over a Full

Temperature Range: 0.2mV/ C

Operating Frequency up to 500KHz

High PWM Frequency Stability over a Full Tem-

perature Range: 2.5%

High PWM Frequency Stability under a Full Sup-

ply Voltage Range: 0.2%

Accurate Over-temperature Protection with Hys-

teresis

UVLO with Hysteresis

The AZ3842 and AZ3844 have UVLO thresholds of

15.5V(on) and 10V(off); The corresponding thresholds

for AZ3843 and AZ3845 are 8.4 V(on) and 7.8V(off).

Applications

Off-line Converter

DC-DC Converter

Voltage Adapter

CRT Monitor Power Supply

Desktop Power Supply

DVD/STB Power Supply

The AZ3842 and AZ3843 can operate approaching

100% duty cycle; AZ3844 and AZ3845 can operate

from zero to 50% duty cycle.

These ICs are available in 3 packages: SOIC-8, DIP-8

and SOIC-14.

SOIC-8

DIP-8

SOIC-14

Figure 1. Package Types of AZ3842/3/4/5

March 2003

Rev: 1.0

12 3 4 5 6 7...13

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与AZ3843M相关器件

型号	品牌	获取价格	描述	数据表
AZ3843MM	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3843P	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3844	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3844AM	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AM14	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AM14-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AM14TR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AM14TR-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AMTR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3844AMTR-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD