FAN7315G

FAN7315G Datasheet

FAN7315

Part	Datasheet
FAN7315G	FAN7315G (pdf)

Related Parts	Information
FAN7315GX	FAN7315GX

PDF Datasheet Preview
FAN7315 LCD Back Light Inverter Drive IC • Wide Dimming Range Analog dimming 1 Burst dimming >100 1 • High Efficiency Single Stage Power Conversion • Wide Input Voltage Range 7.4V to 20V • Back Light Lamp Ballast and Soft Dimming • Few External Components • Precision Voltage Reference Trimmed to 2% • ZVS full-bridge topology • Soft Start • PWM Control at fixed frequency • Analog, Burst Dimming Function • Open Lamp Protection • Open Lamp Regulation • Short Lamp Protection • Thermal Protection • 20 Pin SSOP The FAN7315 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 250kHz depending on the CCFL and the transformer's characteristics. 20-SSOP 2004 Fairchild Semiconductor Corporation FAN7315 Internal Block Diagram OSCILLATOR 5.2uA Output Control Logic Output Driver Output Driver OUTA OUTB PGND OUTC OUTD EA_OUT ADIM EA_IN BCT BDIM AGND Error Amp. + - Solr 240uA Sburst 240uA Solr Voltage Reference Internal Bias Sburst UVLO Thermal protection Q SET R QS UVLO 2.5VREF + 300mV + - 2V SCP REF 1.4V UVLO 7.4V ENA VIN Pin Assignments FAN7315 SCP OUTB OUTA VIN 20 19 18 17 PGND OUTC OUTD CT 16 15 14 13 Ordering Information Product number FAN7315G Package 20-SSOP Operating Temperature -40°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. 10/6/04 0.0m 001 2002 Fairchild Semiconductor Corporation

PDF Datasheet Preview

FAN7315

LCD Back Light Inverter Drive IC
• Wide Dimming Range Analog dimming 1 Burst dimming >100 1
• High Efficiency Single Stage Power Conversion
• Wide Input Voltage Range 7.4V to 20V
• Back Light Lamp Ballast and Soft Dimming
• Few External Components
• Precision Voltage Reference Trimmed to 2%
• ZVS full-bridge topology
• Soft Start
• PWM Control at fixed frequency
• Analog, Burst Dimming Function
• Open Lamp Protection
• Open Lamp Regulation
• Short Lamp Protection
• Thermal Protection
• 20 Pin SSOP

The FAN7315 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 250kHz depending on the CCFL and the transformer's characteristics.
20-SSOP
2004 Fairchild Semiconductor Corporation

FAN7315

Internal Block Diagram

OSCILLATOR
5.2uA

Output Control Logic

Output Driver

Output Driver

OUTA OUTB PGND OUTC OUTD

EA_OUT ADIM EA_IN

BCT BDIM AGND

Error Amp. + -

Solr 240uA

Sburst 240uA

Solr

Voltage Reference

Internal

Bias

Sburst UVLO

Thermal protection

Q SET R QS

UVLO
2.5VREF
+ 300mV
+ - 2V

SCP REF
1.4V

UVLO 7.4V

ENA VIN

Pin Assignments

FAN7315

SCP OUTB OUTA VIN
20 19 18 17

PGND OUTC OUTD CT
16 15 14 13
Ordering Information

Product number FAN7315G

Package 20-SSOP

Operating Temperature -40°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.
10/6/04 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 FAN7315G Datasheet file may be downloaded here without warranties.

Datasheet ID: FAN7315G 513972