Datasheet > MC34025_05

MC34025_05

更新时间： 2024-09-28 04:59:19

品牌	Logo	应用领域
安森美 - ONSEMI		控制器
页数	文件大小	规格书
20页	473K
描述
High Speed Double−Ended PWM Controller

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中文翻译

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数据手册

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MC34025_05 数据手册

MC34025, MC33025

High Speed Double−Ended

PWM Controller

The MC34025 series are high speed, fixed frequency, double−ended

pulse width modulator controllers optimized for high frequency

operation. They are specifically designed for Off−Line and

DC−to−DC converter applications offering the designer a cost

effective solution with minimal external components. These

integrated circuits feature an oscillator, a temperature compensated

reference, a wide bandwidth error amplifier, a high speed current

sensing comparator, steering flip−flop, and dual high current totem

pole outputs ideally suited for driving power MOSFETs.

http://onsemi.com

MARKING

DIAGRAMS

Also included are protective features consisting of input and

reference undervoltage lockouts each with hysteresis, cycle−by−cycle

current limiting, and a latch for single pulse metering.

PDIP−16

P SUFFIX

CASE 648

MC3x025P

AWLYYWWG

The flexibility of this series allows it to be easily configured for

either current mode or voltage mode control.

Features

• 50 ns Propagation Delay to Outputs

SO−16WB

DW SUFFIX

CASE 751G

MC3x025DW

AWLYYWWG

• Dual High Current Totem Pole Outputs

• Wide Bandwidth Error Amplifier

• Fully−Latched Logic with Double Pulse Suppression

• Latching PWM for Cycle−By−Cycle Current Limiting

• Soft−Start Control with Latched Overcurrent Reset

• Input Undervoltage Lockout with Hysteresis

• Low Startup Current (500 mA Typ)

= 3 or 4

= Assembly Location

= Wafer Lot

= Year

• Internally Trimmed Reference with Undervoltage Lockout

• 45% Maximum Duty Cycle (Externally Adjustable)

• Precision Trimmed Oscillator

= Work Week

= Pb−Free Package

• Voltage or Current Mode Operation to 1.0 MHz

• Functionally Similar to the UC3825

PIN CONNECTIONS

• Pb−Free Packages are Available*

Error Amp

Inverting Input

ref

Error Amp

Noninverting Input

Error Amp Output

5.1V

Reference

ref

Output B

Clock

UVLO

Power Ground

Output A

Oscillator

Ground

Ramp

Output B

Ramp

Current Limit/

Shutdown

Latching

PWM and

Steering

Flip Flop

Soft−Start

Error Amp

Output

(Top View)

Error

Amp

Noninverting

Input

Output A

Power

Ground

Inverting

Input

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 18 of this data sheet.

Current

Limit/

Shutdown

Soft−Start

*For additional information on our Pb−Free strategy

and soldering details, please download the

ON Semiconductor Soldering and Mounting

Techniques Reference Manual, SOLDERRM/D.

Ground

This device contains 227 active transistors.

Figure 1. Simplified Application

Semiconductor Components Industries, LLC, 2005

Publication Order Number:

October, 2005 − Rev. 7

MC34025/D

12 3 4 5 6 7...20

中文翻译

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与MC34025_05相关器件

型号	品牌	获取价格	描述	数据表
MC34025_12	ONSEMI	获取价格	High Speed Double-Ended PWM Controller
MC34025DW	ONSEMI	获取价格	High Speed Double-Ended PWM Controller
MC34025DW	MOTOROLA	获取价格	High Speed Double-Ended PWM Controller
MC34025DWG	ONSEMI	获取价格	High Speed Double−Ended PWM Controller
MC34025DWR2	ONSEMI	获取价格	High Speed Double−Ended PWM Controller
MC34025DWR2G	ONSEMI	获取价格	High Speed Double−Ended PWM Controller
MC34025P	ONSEMI	获取价格	High Speed Double-Ended PWM Controller
MC34025P	MOTOROLA	获取价格	High Speed Double-Ended PWM Controller
MC34025PG	ONSEMI	获取价格	High Speed Double−Ended PWM Controller
MC3403	STMICROELECTRONICS	获取价格	LOW POWER QUAD BIPOLAR OPERATIONAL AMPLIFIERS

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