Fairchild FAN7317BMX Fan7317b lcd backlight inverter drive ic Datasheet

FAN7317B
LCD Backlight Inverter Drive IC
Features
Description
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The FAN7317B is a LCD backlight inverter drive IC that
controls P-N full-bridge topology using a new propriety
phase-shift method.
High-Efficiency, Single-Stage Power Conversion
Wide Input Voltage Range: 6V to 28V
Backlight Lamp Ballast and Soft Dimming
Minimal Required External Components
Precision Voltage Reference Trimmed to 2%
ZVS Full-Bridge Topology
Soft-Start
PWM Control at Fixed Frequency
Burst Dimming Function
Dynamic Contrast Ratio Function
Programmable Striking Frequency
Open-Lamp Protection (OLP)
Open-Lamp Regulation (OLR)
Short-Lamp Protection (SLP)
Thermal Shutdown (TSD)
20-Pin SOIC
The FAN7317B provides a low-cost solution and reduces
external components by integrating full wave rectifiers for
open-lamp protection and regulation (patent pending).
The operating voltage range of the FAN7317B is wide, so
an external regulator isn’t necessary to supply the voltage
to the IC.
The FAN7317B provides protections such as open-lamp
regulation, open-lamp protection, and short-lamp
protection to increase the system reliability. The
FAN7317B provides a burst-dimming function and analog
dimming is possible, in a narrow range, by adding
external components.
The FAN7317B is available in a 20-pin SOIC package.
Applications
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LCD TV
LCD Monitor
Ordering Information
Part Number
FAN7317BM
FAN7317BMX
Operating
Temperature
Package
-25 to +85°C
20-Pin Small Outline Integrated Circuit (SOIC)
© 2009 Fairchild Semiconductor Corporation
FAN7317B • 1.0.2
Packing
Method
Rail
Tape and Reel
www.fairchildsemi.com
FAN7317B — LCD Backlight Inverter Drive IC
April 2011
Application
Device
Input Voltage Range
Number of Lamps
22-Inch LCD Monitor
FAN7317B
13±10%
4
1. Features
20
19
18
17
16
15
14
13
12
11
CT
CMP
ENA
OLP4
OLR4
OLP3
OLR3
VIN
OUTD
OUTC
REF
BDIM
BCT
OLP1
OLR1
OLP2
OLR2
GND
OUTB
OUTA
3
4
5
6
7
8
9
10
BDIM(0~3.3V)
IC1
ON/OFF
2
High-Efficiency Single-Stage Power Conversion
P-N Full-Bridge Topology
Reduces Required External Components
Enhanced System Reliability through Protection Functions
1
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Figure 55. Typical Application Circuit
2. Transformer Schematic Diagram
Figure 56. Transformer Schematic Diagram
3. Core & Bobbin
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Core: EFD2126
Material: PL7
Bobbin: EFD2126
© 2009 Fairchild Semiconductor Corporation
FAN7317B • 1.0.2
www.fairchildsemi.com
19
FAN7317B — LCD Backlight Inverter Drive IC
Typical Application Circuit (LCD Backlight Inverter)
13.00
12.60
A
11.43
20
11
B
9.50
10.65 7.60
10.00 7.40
2.25
1
0.51
0.35
PIN ONE
INDICATOR
1.27
0.25
M
10
0.65
1.27
C B A
LAND PATTERN RECOMMENDATION
2.65 MAX
SEE DETAIL A
0.33
0.20
C
0.75
0.25
X 45°
SEATING PLANE
NOTES: UNLESS OTHERWISE SPECIFIED
(R0.10)
GAGE PLANE
(R0.10)
0.10 C
0.30
0.10
0.25
8°
0°
1.27
0.40
SEATING PLANE
(1.40)
DETAIL A
A) THIS PACKAGE CONFORMS TO JEDEC
MS-013, VARIATION AC, ISSUE E
B) ALL DIMENSIONS ARE IN MILLIMETERS.
C) DIMENSIONS DO NOT INCLUDE MOLD
FLASH OR BURRS.
D) CONFORMS TO ASME Y14.5M-1994
E) LANDPATTERN STANDARD: SOIC127P1030X265-20L
F) DRAWING FILENAME: MKT-M20BREV3
SCALE: 2:1
Figure 57. 20-Pin, Small Outline Integrated Circuit (SOIC) Package
Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner
without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or
obtain the most recent revision. Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions,
specifically the warranty therein, which covers Fairchild products.
Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings:
http://www.fairchildsemi.com/packaging/.
© 2009 Fairchild Semiconductor Corporation
FAN7317B • 1.0.2
www.fairchildsemi.com
21
FAN7317B — LCD Backlight Inverter Drive IC
Physical Dimensions
FAN7317B — LCD Backlight Inverter Drive IC
© 2009 Fairchild Semiconductor Corporation
FAN7317B • 1.0.2
www.fairchildsemi.com
22
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