Fairchild FAN7310GX Lcd backlight inverter drive integrated circuit Datasheet

FAN7310
LCD Backlight Inverter Drive Integrated Circuit
Features
Description
„ High-Efficiency, Single-Stage Power Conversion
The FAN7310 provides all the control functions for a
series parallel resonant converter and 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. The FAN7310 has a
patent-pending on phase-shift control.
„ Wide Input Voltage Range: 5V to 24V
„ Backlight Lamp Ballast and Soft Dimming
„ Reduce External Components
„ Precision Voltage Reference Trimmed to 2%
„ ZVS full-bridge topology
„ Soft-Start Feature
„ PWM Control at Fixed Frequency
„ Analog and Burst Dimming Function
„ Synchronizable Switching Frequency with External
Signal
20-SSOP
„ Open-Lamp Protection
„ Open-Lamp Regulation
„ 20-Pin SSOP
Applications
„ LCD TV
„ LCD Monitor
Ordering Information
Part Number
Package
Pb-Free
FAN7310G
20-SSOP
Yes
FAN7310GX
20-SSOP
Yes
© 2005 Fairchild Semiconductor Corporation
FAN7310 Rev. 1.0.3
Operating Temperature Range
-25°C ~ 85°C
Packing Method
Rail
Tape & Reel
www.fairchildsemi.com
FAN7310 — LCD Backlight Inverter Drive Integrated Circuit
May 2007
VCC
IC1
FAN7310
C25
100µF
OLP
0
OLR
R24
10kΩ
ENA
C28
10nF
0
0
0
REF
REF
0
C2
1µF(X7R)
R2
R4 56kΩ
22kΩ
DIM(0~3.3V)
C1
1µF
R3
20kΩ
C21
10nF
0
R6
100kΩ
RT1
OUTA
S_S
VIN
GND
PGND
REF
OUTC
ADIM
OUTD
BDIM
CT
EA_IN
RT
EA_OUT BCT
0
OUTB
OUTB
ENA
C3
4.7nF
C27
1µF
R25
10kΩ
0
0
C22
1µF
0
R26
10kΩ
OUTA
M1
FDS8958A
0
C6
1µF
TX1
0
C7
10µF
M2
FDS8958A
OUTC
OUTD
0
0
C5
220pF
R5
27kΩ
C4
4.7nF
0
OLP1
0
0
OLR
R8
100kΩ
FB
R15
R9
2kΩ
8.2kΩ
CCFL
C10
15pF
0
FB
D4
BAV99
C14
20nF
0
R16
1.5kΩ
D6
BAV99
0
0
0
0
OLR
R14
C16
100kΩ 2.2nF
OLP1
OLP
R1
330kΩ
0
R22
10kΩ
0
Q1
D11
KST2222 D1N4148 C19
2.2nF
D1
0
D1N4148
C9
1µF
FAN7310 Rev. 05
0
Figure 1. Application Circuit for CCFL
Internal Block Diagram
RT
OUTA
OSCILLATOR
Output
Driver
max. 2V
OUTB
CT
min. 0.5V
Output
Control
Logic
+
+
S_S
SYNC
PGND
OUTC
Output
Driver
OUTD
EA_OUT
6μA
Error Amp.
S_S
1.4μA
+
ADIM
+
EA_IN
-
Solr
UVLO
Q
Q
CLR
Voltage
Reference
&
Internal
Bias
-
2V
+
OLR
2V
2.5VREF
REF
-
+
VIN
1.4V
VIN
+
AGND
ENA
+
Sburst
BDIM
2.7V
UVLO
R
-
max. 2V
min. 0.5V
S
Solr
Sburst 85μA
BCT
SET
-
105μA
OLP
+
UVLO
-
UVLO 5V
FAN7310 Rev.03
Figure 2. Functional Block Diagram
© 2005 Fairchild Semiconductor Corporation
FAN7310 Rev. 1.0.3
www.fairchildsemi.com
2
FAN7310 — LCD Backlight Inverter Drive Integrated Circuit
Typical Application
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FRFET
SM
Global Power Resource
Green FPS¥
Power-SPM¥
®
PowerTrench
Programmable Active Droop¥
®
QFET
QS¥
QT Optoelectronics¥
Quiet Series¥
RapidConfigure¥
SMART START¥
®
SPM
STEALTH™
SuperFET¥
SuperSOT¥-3
SuperSOT¥-6
SuperSOT¥-8
Green FPS¥ e-Series¥
GTO¥
i-Lo¥
IntelliMAX¥
ISOPLANAR¥
MegaBuck™
MICROCOUPLER¥
MicroPak¥
Motion-SPM™
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OPTOLOGIC
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OPTOPLANAR
PDP-SPM™
®
Power220
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Power247
®
POWEREDGE
SyncFET™
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The Power Franchise
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TinyBoost¥
TinyBuck¥
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TinyLogic
TINYOPTO¥
TinyPower¥
TinyPWM¥
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UHC
UniFET¥
VCX¥
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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. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. 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.
2. 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.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Definition
Preliminary
First Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
Obsolete
Not In Production
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I28
© 2005 Fairchild Semiconductor Corporation
FAN7310 Rev. 1.0.3
www.fairchildsemi.com
11
FAN7310— LCD Backlight Inverter Drive Integrated Circuit
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