LM2524DMWC

更新时间： 2024-02-24 07:45:06

品牌	Logo	应用领域
美国国家半导体 - NSC		脉冲
页数	文件大小	规格书
22页	1167K
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LM2524DMWC 数据手册

March 2005

LM2524D/LM3524D

Regulating Pulse Width Modulator

one pulse per period even in noisy environments. The

LM3524D includes double pulse suppression logic that in-

sures when a shut-down condition is removed the state of

the T-flip-flop will change only after the first clock pulse has

arrived. This feature prevents the same output from being

pulsed twice in a row, thus reducing the possibility of core

saturation in push-pull designs.

General Description

The LM3524D family is an improved version of the industry

standard LM3524. It has improved specifications and addi-

tional features yet is pin for pin compatible with existing 3524

families. New features reduce the need for additional exter-

nal circuitry often required in the original version.

The LM3524D has a 1% precision 5V reference. The cur-

rent carrying capability of the output drive transistors has

been raised to 200 mA while reducing V_CEsatand increasing

V_CEbreakdown to 60V. The common mode voltage range of

the error-amp has been raised to 5.5V to eliminate the need

for a resistive divider from the 5V reference.

Features

n Fully interchangeable with standard LM3524 family

1% precision 5V reference with thermal shut-down

n Output current to 200 mA DC

n 60V output capability

In the LM3524D the circuit bias line has been isolated from

the shut-down pin. This prevents the oscillator pulse ampli-

tude and frequency from being disturbed by shut-down. Also

at high frequencies (.300 kHz) the max. duty cycle per

output has been improved to 44% compared to 35% max.

duty cycle in other 3524s.

n Wide common mode input range for error-amp

n One pulse per period (noise suppression)

n Improved max. duty cycle at high frequencies

n Double pulse suppression

n Synchronize through pin 3

In addition, the LM3524D can now be synchronized exter-

nally, through pin 3. Also a latch has been added to insure

Connection Diagram

00865002

Top View

Order Number LM2524DN or LM3524DN

See NS Package Number N16E

Order Number LM3524DM

See NS Package Number M16A

DS008650

www.national.com

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