PWM

GL494 Datasheet PDF – PWM Control Circuit

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Part Number: GL494

Function: PWM Control Circuit

Package: DIP 16 Pin Type

Manufacturer: Hynix Semiconductor

Pinouts:

GL494 datasheet

 

Description

The GL494 incorporates on a single monolithic chip all the functions required in the construction of a pulse-width modulation control circuit.

Designed primarily for power supply control, the GL494 contains an on-chip 5-volt regulator, two error amplifiers, adjustable oscillator, deadtime control comparator, pulse-steering flip-flop, and output control circuitry.

Block Diagram

components

Features

1. Complete PWM Power Control Circuitry

2. Uncommitted Outputs for 200mA Sink or Source

3. Output Control Selects Single-Ended or Push-Pull Operation

4. Internal Circuitry Prohibits Double Pulse at Either Output

5. Internal Regulator Provides a Stable 5V Reference Supply

6. Variable Dead-Time Provides Control Over Total Range

Other data sheets are available within the file: L494

GL494 Datasheet PDF Download


GL494 pdf

 

LAF0001 Datasheet PDF – DIP 8Pin – PWM Controller

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Part Number: LAF0001

Function: Green Current Mode PWM Controller

Package: DIP 8Pin

Manufacturer: Fairchild Semiconductor

Image :

LAF0001 datasheet

FAN7601 == LAF0001, This can be replaced by FAN7601

Description

The IC is a green programmable frequency current mode PWM controller. It is specially designed for the off-line adapter application and the auxiliary power supplies which require high efficiency at a light load and no load.

The internal high voltage start-up switch and the burst mode reduce the power loss. The FAN7601 includes some protections such as latch protection and over voltage protection. The latch protection can be used for over voltage protection and/or thermal protection and so on. And the soft start prevents the output voltage over shoot at start up.

Pinout

LAF0001 pinout

Features

1. Green Current Mode PWM Control
2. Low Operating Current: Max 4mA
3. Burst Mode Operation
4. Internal High Voltage Start-up Switch
5. Under Voltage Lockout (UVLO): 12V/8V
6. Latch Protection & Soft Start Function
7. Over Voltage Protection: 19V
8. Operating Frequency up to 300kHz

 

LAF0001 Datasheet PDF ( =  FAN7601 )

LAF0001 pdf


 

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