Datasheet > SG1846

SG1846

更新时间： 2024-11-29 14:48:15

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
17页	824K
描述
The SG1846 family of control ICs provides the required features to implement Fixed Frequency, Curr

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SG1846 数据手册

SG1846/SG2846/SG3846

Current Mode PWM Controller

Features

Description

. Automatic Feed-forward Compensation

. Programmable Pulse by Pulse Current Limiting

The SG1846 family of control ICs provides the required

features to implement Fixed Frequency, Current mode

control schemes while maintaining a minimum external

. Automatic Symmetry Correction in Push-pull

Configuration

parts count.

The advanced performance of this

technique can be measured in improved line regulation,

enhanced load response characteristics, and a simpler,

easier-to-design control loop. Topological advantages

include, inherent pulse-by-pulse current limiting

capability, automatic symmetry correction for push-pull

converters, and the ability to parallel “power modules”

while maintaining equal current sharing.

. Enhanced Load Response Characteristics

. Parallel Operation Capability for Modular Power

Systems

. Differential Current Sense Amplifier with Wide

Common-mode Range

. Double Pulse Suppression

. 200mA Totem-pole Outputs

. ± 1% Bandgap Reference

. Under-voltage Lockout

Protection circuitry includes built-in under-voltage

lockout and programmable current limit in addition to

soft start capability. A shutdown function is also

available which can initiate either a complete shutdown

with automatic restart, or latch the supply off.

. Soft-start and Shutdown Capability

. 500kHz Operation

Other features include fully latched operation, double-

pulse suppression, dead-time adjust capability, and a High Reliability Features

±1% trimmed bandgap reference.

Available To MIL-STD-883 – 883, ¶ 1.2.1

Available to DSCC

– Standard Microcircuit Drawing (SMD)

. SGR1846 Rad-Tolerant Version Available

Block Diagram

5.1 V

REFERENCE

REGULATOR

REF

SYNC

OSC

U.V.LOCKOUT

A OUT

-CURRENT

SENSE

SG1846

Output Stoge

COMP

+CURRENT

SENSE

B OUT

GND

0.5 V

0.5 mA

CURRENT LIMITADJUST

SHUTDOWN

N.I.

INV.

E.A.

350 mV

COMP

Figure 1 · Block Diagram

November 2014 Rev. 1.2

www.microsemi.com

12 3 4 5 6 7...17

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与SG1846相关器件

型号	品牌	获取价格	描述	数据表
SG1846_1	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846F	MICROCHIP	获取价格	The SG1846 family of control ICs provides the required features to implement Fixed Frequen
SG1846F/DESC	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846J	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846J	MICROCHIP	获取价格	The SG1846 family of control ICs provides the required features to implement Fixed Frequen
SG1846J/883B	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846J/DESC	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846L	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846L/883B	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER
SG1846L/DESC	MICROSEMI	获取价格	CURRENT MODE PWM CONTROLLER