UC2838A

更新时间： 2024-10-01 22:41:51

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
5页	272K
描述
Magnetic Amplifier Controller

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UC2838A 数据手册

UC1838A

UC2838A

UC3838A

Magnetic Amplifier Controller

FEATURES

DESCRIPTION

• Independent 1% Reference

The UC1838A family of magnetic amplifier controllers contains the circuitry to gen-

erate and amplify a low-level analog error signal along with a high volt-

age-compliant current source. This source will provide the reset current necessary

to enable a magnetic amplifier to regulate and control a power supply output in the

range of 2A to 20A.

• Two Uncommitted, Identical

Operational Amplifiers

• 100mA Reset Current Source

with –120V Capability

By controlling the reset current to a magnetic amplifier, this device will define the

amount of volt-seconds the magnetic amplifier will block before switching to the

conducting state. Magnetic amplifiers are ideal for post-regulators for multi-

ple-output power supplies where each output can be independently controlled with

efficiencies up to 99%. With a square or pulse-width-modulated input voltage, a

magnetic amplifier will block a portion of this input waveform, allowing just enough

to pass to provide a regulated output. With the UC1838A, only the magnetic ampli-

fier coil, three diodes, and an output L-C filter are necessary to implement a com-

plete closed-loop regulator.

• 5V to 40V Analog Operation

• 5W DIL Package

The UC1838A contains a precision 2.5V reference, two uncommitted high-gain op

amps and a high-gain PNP-equivalent current source which can deliver up to

100mA of magnetic amplifier reset current and with –120 volt capability.

These devices are available in a plastic “bat-wing” DIP for operation over a –20°C

to +85°C temperature range and, with reduced power, in a hermetically sealed

cerdip for –55°C to +125°C operation. Surface mount versions are also available.

This improved “A” version replaced the non “A” version formerly introduced.

BLOCK DIAGRAM

VCC 10

2.5V

REFERENCE

VREF

11 VM

INV. IN

3.5V

E/A

N.I. IN

E/A OUT

INV. IN

14 RESET

15 DR 1

16 DR 2

C/L

N.I. IN

C/L OUT

GND GND GND GND

UDG-97174

04/99

12 3 4 5

中文翻译

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与UC2838A相关器件

型号	品牌	获取价格	描述	数据表
UC2838ADP	ETC	获取价格	MAGNETIC AMPLIFIER CONTROLLER
UC2838ADPTR	TI	获取价格	暂无描述
UC2838ADW	TI	获取价格	SPECIALTY ANALOG CIRCUIT, PDSO16, SOIC-16
UC2838AJ	TI	获取价格	MAGNETIC AMPLIFIER CONTROLLER
UC2838AL	ETC	获取价格	MAGNETIC AMPLIFIER CONTROLLER
UC2838AN	ROCHESTER	获取价格	SPECIALTY ANALOG CIRCUIT, PDIP16
UC2838AN	TI	获取价格	MAGNETIC AMPLIFIER CONTROLLER
UC2838AQ	ROCHESTER	获取价格	POWER SUPPLY SUPPORT CKT, PQCC20
UC2838AQ	TI	获取价格	Magnetic Amplifier Controller 20-PLCC -40 to 85
UC2838DW	TI	获取价格	IC SPECIALTY ANALOG CIRCUIT, PDSO16, SOIC-16, Analog IC:Other