FAN7544N

FAN7544N Datasheet

FAN7544

Part	Datasheet
FAN7544N	FAN7544N (pdf)

Related Parts	Information
FAN7544MX	FAN7544MX
FAN7544M	FAN7544M

PDF Datasheet Preview
FAN7544 Simple Ballast Controller • Low Start-up and Operating Current 140µA, 6.5mA • Under Voltage Lock Out With 1.9V of Hysteresis • 600mA of Totem Pole Output with High State Clamp • Trimmed Internal Bandgap Reference • Programmable Preheat Time & Frequency • Programmable Run Frequency • High Accuracy Oscillator Descriptions The FAN7544 provides simple and high performance electronic 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 frequency and programmable run frequency. The initial preheating 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. 8-DIP 8-SOP Internal Block Diagram 1.6µA 10µA CPH 4 2.9V 2.9V Iph - Irt 6.25Ict 5.2V 1.5V RT 3 RPH 1 Current Source Current Source − VCPH RQ Oscillator S Latch Irt=Vref/Rt Iph=Vref/Rph Shutdown signal 9V Vsup Bias Current SQ RQ Frequency Divider 2004 Fairchild Semiconductor Corporation UVLO 1.9V 8 Vcc 11.6V Vcc 7 OUT1 6 OUT2 5 GND FAN7544 Pin Assignments FAN7544 RPH 1 8 VCC CT 2 RT 3 Ordering Information Product Number FAN7544N FAN7544M FAN7544MX Package 8DIP 8SOP Operating Temperature -25°C ~ +125°C Packing Tube Tape & Reel DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. 9/21/04 0.0m 001 2004 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FAN7544

Simple Ballast Controller
• Low Start-up and Operating Current 140µA, 6.5mA
• Under Voltage Lock Out With 1.9V of Hysteresis
• 600mA of Totem Pole Output with High State Clamp
• Trimmed Internal Bandgap Reference
• Programmable Preheat Time & Frequency
• Programmable Run Frequency
• High Accuracy Oscillator

Descriptions

The FAN7544 provides simple and high performance electronic 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 frequency and programmable run frequency. The initial preheating 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.
8-DIP
8-SOP

Internal Block Diagram
1.6µA 10µA

CPH 4
2.9V
2.9V

Iph - Irt
6.25Ict
5.2V 1.5V

RT 3 RPH 1

Current Source

Current

Source
− VCPH

RQ Oscillator

S Latch

Irt=Vref/Rt

Iph=Vref/Rph Shutdown signal
9V Vsup Bias

Current

SQ RQ

Frequency Divider
2004 Fairchild Semiconductor Corporation

UVLO 1.9V
8 Vcc
11.6V Vcc
7 OUT1
6 OUT2
5 GND

FAN7544

Pin Assignments

FAN7544

RPH 1
8 VCC

CT 2 RT 3
Ordering Information

Product Number FAN7544N FAN7544M FAN7544MX

Package 8DIP 8SOP

Operating Temperature -25°C ~ +125°C

Packing Tube

Tape & Reel

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein:

Life support devices or systems are devices or systems which, a are intended for surgical implant into the body, or b support or sustain life, and c whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.

A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
9/21/04 0.0m 001 2004 Fairchild Semiconductor Corporation

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Datasheet ID: FAN7544N 513981