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FAN7313 IC Datasheet |
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| Part Number | FAN7313 |
| Description | LCD Backlight Inverter Drive IC |
| Manufacture | Fairchild Semiconductor |
| Total Page | 11 Pages |
| Datasheet |
FAN7313
LCD Backlight Inverter Drive IC
September 2006
Features
High-Efficiency Single-Stage Power Conversion
Wide Input Voltage Range: 4.5V to 25.5V
Backlight Lamp Ballast and Soft Dimming
Reduces Required External Components
www.DataSheet4U.comPrecision Voltage Reference Trimmed to 2%
Push-Pull Topology
Soft-Start Capability
PWM Control at Fixed Frequency
Analog and Burst Dimming Functions
Open-Lamp Protection
Open-Lamp Regulation
Over-Voltage Protection
Short-Circuit Protection
20-Pin SOIC
Applications
LCD TV
LCD Monitor
Description
FAN7313 provides all the control functions for a series
parallel resonant converter as well as a pulse width mod-
ulation (PWM) controller to develop a supply voltage.
Typical operating frequency range is between 30kHz and
250kHz, depending on the cold cathode fluorescent
lamp (CCFL) and the transformer’s characteristics.
20-SOIC
Ordering Information
Part Number
FAN7313M
FAN7313MX
Package
20-SOIC
20-SOIC
Pb-Free
Yes
Yes
Operating Temperature Range
-25°C ~ 85°C
Packing Method
Rail
Tape & Reel
© 2006 Fairchild Semiconductor Corporation
FAN7313 Rev. 1.0.0
www.fairchildsemi.com
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Internal Block Diagram
ENA
VIN
1.25V
1μA
+
-
UVLO 4.5V
VIN
+
-
DRV 6V
Internal
Voltage
Reference
UVLO
www.DataSheet4U.com
+
3V -
+
0.25V
2V -
Timer
16 switching
cycles @ Normal
2s @ Strike
+
- 2V
OLR
BDIM
BCT/FT
-
2V +
Positive dimming polarity
Gm Amp. with only
sink current
Disable @ Striking
max. 2V
min. 0.5V
FAULT
BDIM
VBURST
Controller
2.3V
Protection
TSD 150 °C
FAULT
0.45*Va +
-
Input
Control
Logic
VSS_STK
Drivers
VREF
FB
ADIM Va
CMP
2.2V
-
+
+
Error Amp.
VSS_STK
OLP1
20μA
-
1V +
Output
Control
Logic
VSS_STK
OSC
max. 2V
min. 0.5V
Frequency sweep 4ms
Fstrike: Fnormal = 1.3:1
-
20μA
+ 1V
VREF
SCP
VB
OUTH
VS
OUTL
GND
RT
OLP3
OLP2
20μA
-
1V +
-
20μA
+ 1V
OLP4
Figure 1. Functional Block Diagram of FAN7313
FAN7313 Rev. 01
© 2006 Fairchild Semiconductor Corporation
FAN7313 Rev. 1.0.0
2
www.fairchildsemi.com
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| Features | FAN7313 LCD Backlight Inverter Drive IC September 2006 FAN7313 LCD Backlight Inverter Drive IC Features High-Effi ciency Single-Stage Power Conversion Wide Input Voltage Range: 4.5V to 25.5 V Backlight Lamp Ballast and Soft Di mming Reduces Required External Comp onents www.DataSheet4U.com Precision Voltage Reference Trimmed to 2% Pus h-Pull Topology Soft-Start Capabilit y PWM Control at Fixed Frequency Analog and Burst Dimming Functions O pen-Lamp Protection Open-Lamp Regula tion Over-Voltage Protection Shor t-Circuit Protection 20-Pin SOIC De scription FAN7313 provides all the cont rol functions for a series parallel res onant converter as well as a pulse widt h modulation (PWM) controller to develo p a supply voltage. Typical operating f requency range is between 30kHz and 250 kHz, depending on the cold cathode fluo rescent lamp (CCFL) and the transformer ’s characteristics. 20-SOIC Applica tions LCD TV LCD Monitor Ordering Information Part Number FAN7313M FAN7313. |
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