Fairchild (Now ON) FAN7313M, FAN7313M Schematic [ru]
FAN7313
LCD Backlight Inverter Drive IC
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
Precision 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 modulation (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 Package Pb-Free Operating Temperature Range Packing Method
FAN7313M 20-SOIC Yes
FAN7313MX 20-SOIC Yes Tape & Reel
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN7313 Rev. 1.0.0
-25°C ~ 85°C
Rail
Typical Application Circuits
Application Lamps Input Voltage
19-inch LCD Monitor 4 13V
FAN7313 LCD Backlight Inverter Drive IC
1. Schematic
F1
FUSEF1FUSE
C1
220uC1220u
OLR
OLP4
OLP3
0 0
0
0
R2
R3
100kR2100k
100kR3100k
OLP4
OLP3
IC1
FAN7313
OLP2
CN5??CN5
1
2
3
4
5
6
7
8
9
10
??
0
R10
R10
10k
10k
R20
R20
10k
10k
OLP1
R8
R9
100kR8100k
100kR9100k
OLP2
OLP1
REF
R12
R12
120k
120k
C14
C14
R11
R11
10n
10n
8.2k
8.2k
0
0
C17
C17
10n
10n
0
0
R1
C5
27kR127k
10nC510n
VS
RT
OLR
BCT/FT
FB
BDIM
SS_CMP
C12
C12
33n
33n
0
R13
R13
10K
10K
VB
ENA
OUTH
GND
0 0
R23
R23
100k
100k
00
VIN
OUTL
VREF
C131uC13
1u
R22
R22
100k
100k
SCP
ADIM
C23
C23
10n
10n
0
0
C21uC2
1u
0
C31uC3
1u
0
M1
M1
SN
SN
GN
GN
SN
SN
GN
GN
HUFA76413DK8
HUFA76413DK8
R2933R29
R2833R28
33
33
C25
C25
C24
C24
2.2n
2.2n
2.2n
2.2n
DN
DN
DN
DN
C22
C22
330p
330p
DN
DN
DN
DN
OLR
Figure 4. Typical Application Circuit
2. Transformer Schematic Diagram
Supported by Namyang electronics (http://www.namyangelec.co.kr).
TX1TX1
1
OLP1
D3
BAV70D3BAV70
OLP3
D5
BAV70D5BAV70
R21
R21
8.2k
8.2k
R19
R19
10k
10k
2
0
FAN7313 Rev:00
C8
15pC815p
C9
D2
R41kR4
BAV70D2BAV70
1k
TX1TX1
D4
R141kR14
1k
BAV70D4BAV70
R18
R18
C21
C21
100k
100k
4.7n
4.7n
0
0
C10
C10
12n
12n
0
C15
C15
15p
15p
C18
C18
12n
12n
0 0
15pC915p
C11
C11
R51kR5
12n
12n
1k
0000
C16
C16
15p
15p
R151kR15
C19
C19
1k
12n
12n
0
C201nC20
1n
00
1
HOT
CN1
CN1
CCFL
CCFL
2
COLD
HOT
CN2
CN2
CCFL
CCFL
COLD
OLP2
R6
680R6680
R7
680R7680
0
1
HOT
CN4
CN4
CCFL
CCFL
2
COLD
1
HOT
CN3
CN3
CCFL
CCFL
2
COLD
OLP4
R17
R16
R16
680
680
R17
680
680
0
FAN7313 Rev. 00
Figure 5. Transformer Schematic
3. Core & Bobbin
Core: EFD2124
Material: PL7
Bobbin: EFE2124
4. Winding Specification
Pin No. Wire Turns Inductance Leakage Inductance Remarks
6 --> 4 1 UEW 0.35 φ 19 50µH 1.2µH 1KHz, 1V
3 --> 5 1 UEW 0.35
7 --> 9 1 UEW 0.04
© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FAN7313 Rev. 1.0.0 8
φ 19 50µH 1.2µH 1KHz, 1V
φ 2300 826mH 260mH 1KHz, 1V
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