Datasheet > AZ3844AM14TR

AZ3844AM14TR

更新时间： 2024-11-08 04:11:59

品牌	Logo	应用领域
美台 - DIODES		光电二极管
页数	文件大小	规格书
14页	234K
描述
Switching Regulator/Controller, Current-mode, 0.2A, 500kHz Switching Freq-Max, BIPolar, PDSO14

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AZ3844AM14TR 数据手册

Data Sheet

CURRENT MODE PWM CONTROLLER

AZ3842A/3A/4A/5A

General Description

Features

The AZ3842A/3A/4A/5A are high performance fixed

frequency current-mode PWM controller series. They

are improved versions of AZ3842/3/4/5.

Low Start-up Current: 0.15mA

Robust V Line/Load Regulation

REF

Low Line Regulation : 4mV

Low Load Regulation : 4mV

High Stability of Reference Voltage over a Full

These integrated circuits are optimized for off-line and

DC-DC converter applications with minimum external

components. They feature under-voltage lockout

(UVLO) circuit with 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.

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 AZ3842A and AZ3844A have UVLO thresholds

of 16V(on) and 10V(off); The corresponding thresh-

olds for AZ3843A and AZ3845A are 8.4 V(on) and

7.6V(off).

Applications

Off-line Converter

DC-DC Converter

Voltage Adapter

CRT Monitor Power Supply

Desktop Power Supply

DVD/STB Power Supply

The AZ3842A and AZ3843A can operate approaching

100% duty cycle; AZ3844A and AZ3845A can operate

from zero to 50% duty cycle.

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

and SOIC-14.

SOIC-14

SOIC-8

DIP-8

Figure 1. Package Types of AZ3842A/3A/4A/5A

BCD Semiconductor Manufacturing Limited

Apr. 2005 Rev. 1. 3

12 3 4 5 6 7...14

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