UC494

更新时间： 2024-11-24 22:17:51

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
5页	476K
描述
Advanced Regulating Pulse Width Modulators

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UC494 数据手册

UC494A/AC

UC495A/AC

Advanced Regulating Pulse Width Modulators

FEATURES

DESCRIPTION

•

Dual Uncommitted 40V, 200mA

Output Transistors

This entire series of PWM modulators each provide a complete pulse width

modulation system in a single monolithic integrated circuit. These devices in-

clude a 5V reference accurate to 1%, two independent amplifiers usable for

•

1% Accurate 5V Reference

Dual Error Amplifiers

both voltage and current sensing, an externally synchronizable oscillator

with its linear ramp generator, and two uncommitted transistor output

switches. These two outputs may be operated either in parallel for single-

ended operation or alternating for push-pull applications with an externally

controlled dead-band. These units are internally protected against double-

pulsing of a single output or from extraneous output signals when the input

supply voltage is below minimum.

Wide Range, Variable Deadtime

Single-ended or Push-pull

Operation

•

Under-voltage Lockout With

Hysteresis

The UC495A contains an on-chip 39V zener diode for high-voltage applica-

tions where VCC would be greater than 40V, and a buffered output steering

control that overrides the internal control of the pulse steering flip-flop.

•

Double Pulse Protection

Master or Slave Oscillator

Operation

The UC494A is packaged in a 16-pin DIP, while the UC495A is packaged in

an 18 pin DIP. The UC494A, UC495A are specified for operation over the full

military temperature range of -55°C to +125°C, while the UC494AC,

UC495AC are designed for industrial applications from 0°C to +70°C.

•

UC495A: Internal 39V Zener Diode

UC495A: Buffered Steering Control

BLOCK DIAGRAM

10/93

12 3 4 5

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与UC494相关器件

型号	品牌	获取价格	描述	数据表
UC494A	TI	获取价格	Advanced Regulating Pulse Width Modulators
UC494AAC	TI	获取价格	Advanced Regulating Pulse Width Modulators
UC494AC	TI	获取价格	Advanced Regulating Pulse Width Modulators
UC494ACJ	TI	获取价格	Advanced Regulating Pulse Width Modulators 16-CDIP
UC494ACJ/883B	TI	获取价格	0.2A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, CDIP16, DIP-16
UC494ACN	TI	获取价格	Advanced Regulating Pulse Width Modulators
UC494AJ	TI	获取价格	Advanced Regulating Pulse Width Modulators 16-CDIP
UC494AJ	ROCHESTER	获取价格	Switching Controller, Voltage-mode, 0.2A, 300kHz Switching Freq-Max, CDIP16, CERAMIC, DIP-
UC494AJ883B	TI	获取价格	Advanced Regulating Pulse Width Modulators
UC494AN/883B	TI	获取价格	0.2A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PDIP16, DIP-16