FAN7300G

FAN7300G Datasheet

FAN7300

Part	Datasheet
FAN7300G	FAN7300G (pdf)

Related Parts	Information
FAN7300GX	FAN7300GX

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FAN7300 LCD Back Light Inverter Drive IC • High Efficiency Single Stage Power Conversion • Wide Input Voltage Range 6V to 25V • Back Light Lamp Ballast and Soft Dimming • Few External Components • Precision Voltage Reference Trimmed to 2% • Soft Start • PWM and PFM Control • Analog, Burst and Mixed Dimming Function • Allows All N-Channel MOSFET Drive • Double Pulse Suppression Logic • Open Lamp Detection • Output Short Circuit Protection • Open Lamp Regulation • 20 Pin SSOP The FAN7300 provides all the control functions for a series parallel resonant converter and also contains a pulse width modulation PWM controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 100kHz depending on the CCFL and the transformer's characteristics. 20-SSOP 2003 Fairchild Semiconductor Corporation FAN7300 Internal Block Diagram Vcc ENA 5.4V UVLO + Internal Bias 1.5Vref S_S EA_IN + 1.5V Error Amp. Buffer Multiplier Gain K Vmo EA_OUT OLR 3V COMP3 + - E/A Controller Current Generator COMP1 max. 1.75V Clock Main Control Oscillator min. 0.25V COMP2 max. 1.75V min. 0.25V Vb Dimming control and Mode Selection Analog Burst Mixed COMP6 COMP7 3.7V 3.7V 3V 2uA OLP COMP4 COMP5 1.5V 1.5V High side gate driver Low side gate driver Ordering Information Product number FAN7300G Package 20-SSOP Operating Temperature -25°C ~ 85°C 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. 4/22/03 0.0m 001 2002 Fairchild Semiconductor Corporation

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FAN7300

LCD Back Light Inverter Drive IC
• High Efficiency Single Stage Power Conversion
• Wide Input Voltage Range 6V to 25V
• Back Light Lamp Ballast and Soft Dimming
• Few External Components
• Precision Voltage Reference Trimmed to 2%
• Soft Start
• PWM and PFM Control
• Analog, Burst and Mixed Dimming Function
• Allows All N-Channel MOSFET Drive
• Double Pulse Suppression Logic
• Open Lamp Detection
• Output Short Circuit Protection
• Open Lamp Regulation
• 20 Pin SSOP

The FAN7300 provides all the control functions for a series parallel resonant converter and also contains a pulse width modulation PWM controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 100kHz depending on the CCFL and the transformer's characteristics.
20-SSOP
2003 Fairchild Semiconductor Corporation

FAN7300

Internal Block Diagram

Vcc ENA
5.4V

UVLO +

Internal Bias
1.5Vref

S_S EA_IN
+ 1.5V

Error Amp.

Buffer

Multiplier Gain K Vmo

EA_OUT OLR 3V

COMP3 + -

E/A Controller

Current Generator

COMP1
max. 1.75V

Clock

Main Control Oscillator
min. 0.25V

COMP2
max. 1.75V min. 0.25V Vb

Dimming control and Mode Selection

Analog

Burst

Mixed

COMP6 COMP7
3.7V
3.7V 3V
2uA OLP

COMP4 COMP5
1.5V 1.5V

High side gate driver

Low side gate driver
Ordering Information

Product number FAN7300G

Package 20-SSOP

Operating Temperature -25°C ~ 85°C

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.
4/22/03 0.0m 001 2002 Fairchild Semiconductor Corporation

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived FAN7300G Datasheet file may be downloaded here without warranties.

Datasheet ID: FAN7300G 513966