Datasheet > AZ3842M

AZ3842M

更新时间： 2024-09-21 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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AZ3842M 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AZ3842M相关器件

型号	品牌	获取价格	描述	数据表
AZ3842MM	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3842P	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3843	AAT	获取价格	CURRENT MODE PWM CONTROLLER
AZ3843AM	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AM14	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AM14-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AM14TR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AM14TR-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AM-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3843AMTR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD