Datasheet > NCP1562B

NCP1562B

更新时间： 2024-11-20 04:37:59

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
26页	311K
描述
High Performance Active Clamp/Reset PWM Controller

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NCP1562B 数据手册

NCP1562A, NCP1562B

High Performance Active

Clamp/Reset PWM Controller

The NCP1562x is a family of voltage mode controllers designed

for dc−dc converters requiring high−efficiency and low parts count.

These controllers incorporate two in phase outputs with an overlap

delay to prevent simultaneous conduction and facilitates soft

switching. The main output is designed for driving a forward

converter primary MOSFET. The secondary output is designed for

driving an active clamp circuit MOSFET, a synchronous rectifier on

the secondary side, or an asymmetric half bridge circuit.

http://onsemi.com

MARKING

DIAGRAMS

The NCP1562 family reduces component count and system size by

incorporating high accuracy on critical specifications such as

maximum duty cycle limit, undervoltage detector and overcurrent

threshold. Two distinctive features of the NCP1562 are soft−stop and

a cycle skip current limit with a time threshold. Soft−stop circuitry

powers down the converter in a controlled manner if a severe fault is

detected. The cycle skip detector enables a soft−stop sequence if a

continuous overcurrent condition is present.

Additional features found in the NCP1562 include line feed−

forward, frequency synchronization up to 1.0 MHz, cycle−by−cycle

current limit with leading edge blanking (LEB), independent under

and overvoltage detectors, adjustable output overlap delay,

programmable maximum duty cycle, internal startup circuit and

soft−start.

NCP

562x

ALYW

TSSOP−16

DT SUFFIX

CASE 948F

SO−16

D SUFFIX

CASE 751B

NCP1562xG

AWLYWW

= Current Limit (A, B)

= Assembly Location

WL, L = Wafer Lot

= Year

Features

WW, W = Work Week

• Dual Control Outputs with Adjustable Overlap Delay

• >2.0 A Output Drive Capability

• Soft−Stop Powers Down Converter in a Controlled Manner

• Cycle−by−Cycle Current Limit

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 24 of this data sheet.

• Cycle Skip Initiated if Continuous Current Limit Condition Exists

• Voltage Mode Operation with Input Voltage Feedforward

• Fixed Frequency Operation up to 1.0 MHz

• Bidirectional Frequency Synchronization

• Independent Line Undervoltage and Overvoltage Detectors

• Accurate Programmable Maximum Duty Cycle Limit

• Programmable Maximum Volt−Second Product

• Programmable Soft−Start

Typical Applications

• Telecommunications Power Converters

• Low Output Voltage Converters using

Control Driven Synchronous Rectifier

• Industrial Power Converters

• Internal 100 V Startup Circuit

• Precision 5.0 V Reference

• These are Pb−Free Devices*

• 42 V Automotive System

• ATX Power Supplies

*For additional information on our Pb−Free strategy and soldering details, please

downloadthe ON Semiconductor Soldering and Mounting Techniques Reference

Manual, SOLDERRM/D.

Semiconductor Components Industries, LLC, 2006

Publication Order Number:

November, 2006 − Rev. 0

NCP1562A/D

12 3 4 5 6 7...26

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