FAN7544 Datasheet

IC型號(hào)：
FAN7544
PDF描述：
Simple Ballast Controller
文件大?。?/label>
1186.43KB
PDF頁數(shù)：
14頁
芯片廠家：
FAIRCHILD

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FAN7544

Features

鈥?/div>

Simple Ballast Controller

Descriptions

The FAN7544 provides simple and high performance elec-

tronic ballast control functions. The FAN7544 is optimized

for electronic ballast requiring a minimum board area, by

reducing component counts and lowering power dissipation.

The features include programmable preheating time and fre-

quency and programmable run frequency. The initial pre-

heating time and frequency can be adjusted according to the

types of lamps using the CPH, CT and RPH. Output gate

driver circuit clamps power MOSFET gate voltage to the

supply voltage.

Low Start-up and Operating Current : 140碌A(chǔ), 6.5mA

Under Voltage Lock Out With 1.9V of Hysteresis

600mA of Totem Pole Output with High State Clamp

Trimmed 1.5% Internal Bandgap Reference

Programmable Preheat Time & Frequency

Programmable Run Frequency

High Accuracy Oscillator

8-DIP

8-SOP

Internal Block Diagram

9V Vsup

Bias

Current

2.1

Iph - Irt

UVLO

1.9V

Vcc

2.9V

11.6V

S Q

R Q

Vcc

1.6碌A(chǔ)

10碌A(chǔ)

2.9V

Ict

Irt

OUT1

5.2V

6.25Ict

R Q

Oscillator

Latch

Irt=Vref/Rt

Frequency

Divider

Vcc

1.5V

Current

Source

Current

Source

OUT2

Iph=Vref/Rph

Shutdown signal

鈭?/div>

GND

CPH

鈭?/div>

TSD

Rev. 1.0.0

漏2004 Fairchild Semiconductor Corporation

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