Datasheet > SPW3842D

SPW3842D

更新时间： 2024-11-15 06:13:35

品牌	Logo	应用领域
SECOS		/
页数	文件大小	规格书
10页	1854K
描述
High Performance Current Mode Controlers

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中文翻译

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SPW3842D 数据手册

SPW3842D

High Performance Current Mode

Elektronische Bauelemente

Controlers

RoHS Compliant Product

DIP-8

Description

GAUGE PLANE

The SPW3842D is high performance fixed frequency current mode

controllers. This is specifically designed for Off-Line and DC TO DC

converter applications offering the designer a cost-effective solution

with min. external components. These integrated circuits feature a

trimmed oscillator for precise duty cycle control. A temperature

compensated reference, high gain Error amplifier, current sensing

comparator, and a high current totem pole output ideally suited for

driving a power MOSFET. Also included are protective features

consisting of input and reference undervoltages lockouts each with

hysteresis, cycle-by-cycle current limiting, proprammable output

deadtime, and latch for single pulse metering.

SEATING PLANE

SECTION Z - Z

Features

* Low Startup And Operating Current

Millimeter

Automatic Feed Forward Compensation

REF.

Min.

Max.

0.5334

Min.

0.203

9.017

6.096

7.620

Max.

0.279

10.16

7.112

8.255

* High Current Totem Pole Output

* Trimmed Oscillator For Precise Frequency Control

* Oscillator Frequency Graranteed At 250kHz

* Undervoltage Lockout With Hysteresis

0.381

2.921

0.356

1.143

0.762

0.203

4.953

0.559

0.508

1.778

1.143

0.356

2.540 BSC

10.92

3.810

* Current Mode Operation To 500kHz

2.921

* Internally Trimmed Reference With Undervoltage Lockout

* Iatching PWM For Cycle-By-Cycle Current Limiting

DIP-8L

Function

Description

Pin1:Compensation

This pin is the Error Amplifier output and is made available for loop

compensation.

Pin2:Voltage Feedback

Pin3:Current Sense

Pin4:RT/CT

This is the inverting input of the Error Amplifier. It’s normally connected to the

Switching power supply output through a resistor divider.

A voltage proportional to inductor current is connected to this input .The

PWM uses this information to terminate the output switch conduction.

The oscillator frequency and maximum output duty cycle are programmed by

connecting resistor RT to Vref and capacitor CT to ground. Operation 500kHz

is possible.

Pin5:Ground

Pin6:Output

This pin is the combined control circuitry and power ground.

This output directly drives the gate of a power MOSFET. Peak currents up to

1 A are sourced and sunk by this pin.

Pin7:Vcc

Pin8:Vref

This pin is the positive supply of the control IC.

This is the reference output. It provides charging current for capacitor CT

through resistor RT.

http://www.SeCoSGmbH.com/

Any changing of specification will not be informed individual

01-Jun-2002 Rev. A

Page 1 of 10

12 3 4 5 6 7...10

中文翻译

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与SPW3842D相关器件

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