Datasheet > AZ3842

AZ3842

更新时间： 2024-11-10 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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AZ3842 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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AZ3842AM	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AM14	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AM14-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AM14TR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AM14TR-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AM-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AMTR	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AMTR-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD
AZ3842AP	ETC	获取价格	IC
AZ3842AP-E1	DIODES	获取价格	Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PD