FAN7319 LCD Backlight Inverter Drive IC FAN73

FAN7319
LCD Backlight Inverter Drive IC
Features


















Description
High-Efficiency Single-Stage Power Conversion
Wide Input Voltage Range: 10V to 24V
Backlight Lamp Ballast and Soft Dimming
Minimal Required External Components
Precision Voltage Reference Trimmed to 2%
ZVS or ZCS Push-Pull & Full-Bridge Topology
PWM Control at Fixed Frequency
ZCS Control by Sensing Resonant Tank Current
External Pulse Burst Dimming Function - Positive
Analog Dimming Function - Positive
Programmable Striking Frequency
Open-Lamp Protection
Open-Lamp Regulation
Short-Lamp Protection
CMP-High Protection
Dynamic Contrast Ratio Mode
Thermal Shutdown
20-Pin SOP
The FAN7319 is a LCD backlight inverter drive IC that
controls N-N push-pull topology or N-N full-bridge
topology using a proprietary phase-shift method.
The FAN7319 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 is wide, so an external
regulator isn’t necessary to supply voltage to the IC.
The FAN7319 provides various protections, such as
open-lamp regulation, open-lamp protection, short-lamp
protection, CMP-high protection, and FB-high protection,
to increase the system reliability. The FAN7319 provides
burst dimming function and analog dimming.
The FAN7319 is available in a 20-Lead Small Outline
Integrated Circuit (SIOC) package.
Applications


LCD TV
LCD Monitor
Ordering Information
Part Number
Operating Temperature
Package
Packing Method
FAN7319M
-25 to +85°C
FAN7319MX
-25 to +85°C
20-Lead, SOIC, JEDEC
MS-013, .300 Inch, Wide Body
Tape & Reel
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
Rail
www.fairchildsemi.com
FAN7319 — LCD Backlight Inverter Drive IC
May 2011
Application
Input Voltage Range
Number of Lamps
LCD TV (LIPS Type)
13±10%
CCFL/EEFL IP
OLR
PFC_OUT(380Vdc)
F1
450V
C11
CN3
CN_CCFL
R16
1k
R105
12k
22R
1.8R
Q101
R103
Q2N2222A
12k
C102 SOT-23
1n
D101
22R
R201
68R
R204
SOT-23
BAV70
1k
C101
OPEN
ZD101
open
C5
SOD-123
R12
10k
R14
10k
C8
15n
R205
12k
C202
1n
680nF
R202
M2
1.8R
R203
Q201
12k
Q2N2222A
SOT-23
C201
OPEN
0
R33
TO-220F
ZD201
open
FDPF7N50F
SOD-123
R20
33
R302
1k
R305
12k
22R
D301
1.8R
R303
Q301
Q2N2222A
12k
C302 SOT-23
1n
R401
68R
R404
SOT-23
BAV70
1k
R405
12k
C402
1n
R27
33
M3
68R
R304
SOT-23
BAV70
22R
SOT-23
R19
T2
R106
R34
30k
D10 BAV70
1W
0
R301
R107
SENSE
open
R21
OPEN
1W
Puls e
Trans form er
OUTA
1
C7
15n\
600V
D201
OUTB
C6
27pF/6KV
SOT-23
TO-220F
T3
R108
OUTC
2
1
BAV70
R109
C3
27pF/6KV
M1
68R
R104
SOT-23
R102
CN4
CN_CCFL
D8
BAV70
FDPF7N50F
R101
T1
OUTD
2
1
Puls e
Trans form er
0
30k
R15
10k
L1 = 700uH / L2 = 400uH
K=0.98
22p
2
450V
FUSE
1
C52
100uF
2
C51
100uF
ZD301
open
C401
OPEN
ZD401
open
FDPF7N50F
SOT-23
1W
0
SOD-123
R402
1.8R
R403
Q401
12k
Q2N2222A
OLP
R22
30k
R28
OPEN
1W
TO-220F
C301
OPEN
0
15k
M4
FDPF7N50F
TO-220F
SOD-123
D401
R56
ENA
22R
R58
33k
C27
100n
C28
1n
0
R57
VIN
R39
VIN(10~24V)
0
VOLP
2.2u
REF
C24
R38
10k
BDIM(External only)
ADIM
R40
open
C16
1n
R44
10k
C25
100n
C15
CMP
C29
TIMER
1u
ADIM(Positive)
12505WR-5
4.7n
0
R31
51k
SENSE
R35
15k
0
OLP
OLP
C26
1n
R59
OPEN
OLR
OLR
R60
0R
0
R52
VIN
VIN
OUTA
OUTB
OUTB
SENSE
OUTC
OUTC
GND
OUTD
OUTD
RT1
R30
82k
R55
47k
MODE
OUTA
RT
0
OVPR
FAN7319
BDIM
10k R53
1
2
3
4
5
R54
68k
ENA
100k
1k
CN2
REF
20-SOIC
IC2
C23
2.2u
C1
47uF
4.7R
25V
0
FAN7319
REF
Figure 47. Typical Full-Bridge Application Circuit
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
www.fairchildsemi.com
20
FAN7319 — LCD Backlight Inverter Drive IC
Typical Full-Bridge Application Circuit (LCD Backlight Inverter)
Application
Input Voltage Range
Number of Lamps
LCD TV (LIPS Type)
13±10%
CCFL/EEFL IP
OLR
PFC_OUT(380Vdc)
F1
C7
15n\
600V
CN4
CN_CCFL
1
2
1
0
30k
R15
10k
D8
BAV70
C3
25pF/6KV
C5
22p
R16
2
C11
CN3
CN_CCFL
2
FUSE
1
450V
2
C52
82uF
450V
1
C51
82uF
C6
25pF/6KV
SOT-23
R12
10k
R14
10k
C8
15n
T3
680nF
0
R33
SENSE
open
R20
33
R21
OPEN
1W
R34
30k
D10 BAV70
1W
SOT-23
R19
FDPF7N50F
Puls e
Trans form er
R301
T2
SOT-23
BAV70
R306
OUTB
1k
R305
12k
D301
R307
22R
R302
1.8R
R303
Q301
Q2N2222A
C302 SOT-23
12k
1n
R401
SOT-23
BAV70
68R
R404
1k
R405
12k
C402
1n
R27
33
M3
68R
R304
22R
OUTA
0
ZD301
15V
C401
OPEN
ZD401
15V
SOT-23
1W
0
SOD-123
R402
1.8R
R403
Q401
Q2N2222A
12k
OLP
R22
30k
R28
OPEN
1W
TO-220F
C301
OPEN
0
15k
M4
FDPF7N50F
TO-220F
SOD-123
D401
R56
ENA
22R
R58
33k
C27
100n
C28
1n
0
R57
0
VIN
VOLP
REF
C24
R38
10k
ADIM
R53
1
2
3
4
5
BDIM(External only)
10k
C16
1n
R44
10k
C25
100n
C15
CMP
C29
TIMER
1u
ADIM(Positive)
12505WR-5
10n
0
RT
0
R31
33k
RT1
R30
open
SENSE
R35
15k
0
OVPR
FAN7319
BDIM
CN2
R54
68k
ENA
100k
2.2u
VIN(10~24V)
REF
20-SOIC
IC2
R55
47k
C26
1n
R59
0R
MODE
OLP
OLP
OLR
OLR
R60
OPEN
0
R52
VIN
VIN
OUTA
OUTA
OUTB
OUTB
SENSE
OUTC
GND
OUTD
C23
2.2u
C1
47uF
4.7R
25V
0
FAN7319
REF
Figure 48. Typical Half-Bridge Application Circuit
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
www.fairchildsemi.com
21
FAN7319 — LCD Backlight Inverter Drive IC
Typical Half-Bridge 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 49. 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/.
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
www.fairchildsemi.com
22
FAN7319 — LCD Backlight Inverter Drive IC
Physical Dimensions
FAN7319 — LCD Backlight Inverter Drive IC
© 2010 Fairchild Semiconductor Corporation
FAN7319 • 1.0.1
www.fairchildsemi.com
23