Datasheet > UC2578_16

UC2578_16

更新时间： 2024-11-10 02:58:51

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
7页	135K
描述
Buck Pulse Width Modulator Stepdown Voltage Regulator

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中文翻译

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UC2578_16 数据手册

application

INFO

UC2578

UC3578

available

Buck Pulse Width Modulator Stepdown Voltage Regulator

FEATURES

DESCRIPTION

• Provides Simple Single Inductor Buck The UC3578 is a PWM controller with an integrated high side floating gate

PWM Step-Down Voltage Regulation

driver. It is used in buck step down converters and regulates a positive

output voltage. Intended to be used in a distributed power system, the IC

allows operation from 14V to 72V input voltage which range includes the

prevalent telecomm bus voltages. The output duty cycle of the UC3578

can vary between 0% and 90% for operation over the wide input voltage

and load conditions.

• Drives External High Side NMOS

Switch

• 14V to 72V Input Voltage Operating

Range

• Contains 100kHz Internal Oscillator,

2V Reference and UVLO

The UC3578 simplifies the design of the single switch PWM buck converter

by incorporating a floating high side driver for an external N-channel

MOSFET switch. It also features a 100kHz fixed frequency oscillator, an

internal 2V precision reference, an error amplifier configured for voltage

mode operation, and a PWM comparator with latching logic. Comple-

menting the traditional voltage mode control block, the UC3578 incorpo-

rates an overcurrent shutdown circuit with full cycle soft re-start to limit the

input current to a user defined maximum value during overload operation.

Additional functions include an under voltage lockout circuit to insure that

sufficient input supply voltage is present before any switching activity can

occur.

• Soft Start on Power Up

• Overcurrent Shutdown Followed by

Soft Start

The UC2578 and the UC3578 are both available in surface mount and

thru-hole power packages.

ORDERING INFORMATION

TEMPERATURE RANGE

PACKAGE

Power SOIC

Power PDIP

Power SOIC

Power PDIP

UC2578DP

UC2578N

UC3578DP

UC3578N

–40°C to +85°C

0°C to +70°C

TYPICAL APPLICATION DIAGRAM

SENSE

0.12

OUT

15-40 V

OUT

IRFZ34

40µH

220µF

1µF

1000pF

OUT

RECTIFIER

MBR 3100

1µF

47µF

1N4148

DIODE CS

14 VCC

VGG OUT

SRC

EAINV

50k

220pF

UC3578

1µF

2200pF

100k

16 SS

GND GND GND GND

EAOUT

UDG-99064

05/99

12 3 4 5 6 7

中文翻译

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与UC2578_16相关器件

型号	品牌	获取价格	描述	数据表
UC2578DP	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Regulator
UC2578DPG4	TI	获取价格	0.8A SWITCHING CONTROLLER, 120kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SOIC-16
UC2578DPTR	TI	获取价格	暂无描述
UC2578DPTRG4	TI	获取价格	0.8A SWITCHING CONTROLLER, 120kHz SWITCHING FREQ-MAX, PDSO16, SOIC-16
UC2578N	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Regulator
UC2578NG4	TI	获取价格	Buck Pulse Width Modulator Stepdown Voltage Regulator 16-PDIP -40 to 85
UC2584	TI	获取价格	Secondary Side Synchronous Post Regulator
UC2584DW	TI	获取价格	Secondary Side Synchronous Post Regulator
UC2584DWTR	TI	获取价格	暂无描述
UC2584N	TI	获取价格	Secondary Side Synchronous Post Regulator