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FAN7313 LCD Backlight Inverter Drive IC
September 2006
FAN7313 LCD Backlight Inverter Drive IC
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
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
Applications
LCD TV LCD Monitor
Ordering Information
Part Number
FAN7313M FAN7313MX
Package
20-SOIC 20-SOIC
Pb-Free
Yes Yes
Operating Temperature Range
-25C ~ 85C
Packing Method
Rail Tape & Reel
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0
www.fairchildsemi.com
FAN7313 LCD Backlight Inverter Drive IC
Internal Block Diagram
1.25V ENA
1A
+ DRV 6V Internal Voltage Reference UVLO VREF
VIN UVLO 4.5V + 3V -
+ -
VIN
Timer + 2V OLR 2V BDIM Positive dimming polarity max. 2V min. 0.5V 0.45*Va + FAULT + Disable @ Striking VBURST BDIM Controller FAULT
0.25V
16 switching cycles @ Normal 2s @ Strike Gm Amp. with only sink current
+ 2V
SCP
Protection
TSD 150 C VB OUTH
+
2.3V
-
BCT/FT
Input Control Logic VSS_STK
Drivers
VREF
VS
OUTL GND Output Control Logic max. 2V VSS_STK VSS_STK OSC Frequency sweep 4ms min. 0.5V RT
FB 2.2V ADIM Va
+ + Error Amp.
CMP
Fstrike: Fnormal = 1.3:1
OLP1
20A
1V +
+ 1V
20A
OLP3
OLP2
20A
1V +
+ 1V
20A
OLP4
FAN7313 Rev. 01
Figure 1. Functional Block Diagram of FAN7313
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 2
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FAN7313 LCD Backlight Inverter Drive IC
Pin Assignments
OLP3 20
OLP4 19
OLR 18
BCT/FT 17
RT 16
SCP 15
VS 14
OUTH 13
VB 12
VIN 11
FAN7313
1 OLP1
2 OLP2
3 CMP
4 FB
5 BDIM
6 ADIM
7 ENA
8 GND
9 OUTL
10 VREF
FAN7313 Rev. 00
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
1 2 3 4 5 6 7 8 9 10
Name
OLP1 OLP2 CMP FB BDIM ADIM ENA GND OUTL VREF
Description
Open-Lamp Protection 1 Open-Lamp Protection 2 Error Amplifier Output Error Amplifier Input Burst Dimming Input Analog Dimming Input Enable Input Ground Low-Side Driver Output Reference Voltage
Pin #
11 12 13 14 15 16 17 18 19 20
Name
VIN VB OUTH VS SCP RT BCT/FT OLR OLP4 OLP3
Description
Supply Voltage Connected to VREF Internally High-Side Driver Output Connected to GND Internally Short-Circuit Protection Timing Resistor Burst Dimming Timing Capacitor/ Fault Signal Output Open-Lamp Regulation Open-Lamp Protection 4 Open-Lamp Protection 3
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 3
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FAN7313 LCD Backlight Inverter Drive IC
Absolute Maximum Ratings
The "Absolute Maximum Ratings" are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. For typical values, TA=25C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25C TA 85C and 4.5V VIN 25.5V, unless otherwise specified.
Symbol
VIN TA TJ TSTG
JA
Characteristics
Supply Voltage Operating Temperature Range Junction Temperature Storage Temperature Range Thermal Resistance Junction-to-Ambient Power Dissipation
(1)(2)
Value
25.5 -25 ~ 85 150 -65 ~ 150 70 1.8
Unit
V
C C C C/W
PD
W
Notes: 1. Thermal resistance test board size: 76.2 * 114.3 * 1.6mm (1S0P). JEDEC standard: JESD51-2, JESD51-3. 2. Assume no ambient airflow.
Pin Breakdown Voltage
No
1 2 3 4 5 6 7 8 9 10
Name
OLP1 OLP2 CMP FB BDIM ADIM ENA GND OUTL VREF
Max.
10 10 4 10 10 10 10 6 10
Unit
No
11 12 13 14 15 16 17 18 19 20
Name
VIN VB OUTH VS SCP RT BCT/FT OLR OLP4 OLP3
Max.
25.5 10 6 10
Unit
V
V
10 10 10
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 4
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FAN7313 LCD Backlight Inverter Drive IC
Electrical Characteristics
For typical values, TA=25C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25C TA 85C and 4.5V VIN 18V, unless otherwise specified. Specifications to -25C ~ 85C are guaranteed by design based on final characterization results.
Symbol
V6 V6line V6load
Characteristics
6V Regulation Voltage 6V Line Regulation 6V Load Regulation
Test Condition
Min.
5.76 0
Typ.
6.00
Max.
6.24 0.1 0.1
Unit
V V V KHz KHz V V
REFERENCE SECTION
00 97.5 96 100.0 100 2.0 0.5
OSCILLATOR SECTION (MAIN)
fosc Vcth Vctl fstr Tstoff Vfbth
Oscillation Frequency(4) CT High-Voltage(3) CT Low-Voltage(3)
103.7 104
Striking Frequency(4) Strike-Off Delay Time FB Threshold Voltage
TA=25C, RT=27k RT=27k ADIM=1
125.7 124 0.35
130 130 4 0.45 318 318 2.0 0.5 4.0 360 59 2.150 2.150 -1.7 73 50 719 190 260 4.2 0.45 55 1.5 100
135.6 136 0.55 332.5 340 2.1 0.6 4.5 600 2.195 2.215 -1.2 100 -33 1300 300 400 4.5 0.60 120 2.5 150
kHz KHz ms V Hz Hz V V V mho dB V V A A A mho A A V V A mA A
OSCILLATOR SECTION (BURST)
foscb Vbcth Vbctl Vbctft Gm AV V2p2 Iss lsin lsur Gmolr Iolr
Oscillation Frequency BCT/FT High-Voltage BCT/FT Low-Voltage BCT/FT Fault-Voltage Error Amplifier Transconductance(3) Error Amplifier Open-Loop Gain(3) 2.2V Regulation Voltage Soft-Start Current CMP Sink Current CMP Source Current OLR Transconductance(3) Open-Lamp Regulation Current
TA=25C, BCT/FT=10nF, RT=27k 301.6 BCT/FT=10nF, RT=27k BCT/FT=10nF, RT=27k BCT/FT=10nF, RT=27k 296 1.9 0.4 3.5 ADIM=1~2.2V TA=25C, ADIM > 2.2V ADIM > 2.2V CMP=2V, FB < 0.45*ADIM CMP=1V, ADIM < FB CMP=1V, 0.45*ADIM < FB < ADIM Striking, OLR=2.5V Normal, OLR=2.5V 100 2.119 2.086 -3.2 44 -67 300 60 60 3.9 0.20 VIN=Vth-0.2 Not switching ENA=0 20 0.5 60
ERROR AMPLIFIER SECTION
UNDER-VOLTAGE LOCK OUT SECTION
Vth Vthhys Ist Iop Isb
Start Threshold Voltage Start Threshold Voltage Hysterisis Start-up Current Operating Supply Current Stand-by Current
Notes: 3. These parameters, although guranteed, are not 100% tesed in production. 4. These parameters, although guranteed, are tested in only EDS test.
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 5
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FAN7313 LCD Backlight Inverter Drive IC
Electrical Characteristics (Continued)
For typical values TA=25C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25C TA 85C and 4.5V VIN 18V, unless otherwise specified. Specifications to -25C ~ 85C are guaranteed by design based on final characterization results.
Symbol Characteristics
PROTECTION SECTION
Test Condition
FB=OLP=2V
Min.
1.9 2.1 0.95 2.85 1.9
Typ.
2.0 2.3 1.00 3.00 2.0 250 2.0 300 2.0 300 2.0 2.0 300 150
Max.
2.1 2.5 1.08 3.15 2.1 2.3 500 2.3 500 2.3 2.3 500
Unit
V V V V V mV sec sec sec sec sec sec sec
C
Vscp Vcmpr Volp Vovp Volr Volrhy Tscp Tcmp Tolp Tolr TSD Vena Vdis Iena fnrmo fstro Vuvh Vuvl Venh Venl OUTH OUTL Idsurh Idsinh Idsurl Idsinl trh tfh trl tfl tdead
Short-Circuit Protection Voltage CMP Protection Voltage Open-Lamp Protection Voltage Over-Voltage Protection Open-Lamp Regulation Voltage Opem-Lamp Regulation Hystersis(5) Short-Circuit Protection Delay CMP Protection Delay Open-Lamp Protection Delay Open-Lamp Regulation Delay Thermal Shutdown Enable State Input Voltage Disable State Input Voltage Enable Discharge Current Output Normal Frequency(6) Output Striking Frequency(6) High-Side Output Voltage Before Start-up Low-Side Output Voltage Before Start-up High-Side Output Voltage at Vena=0V Low-Side Output Voltage at Vena=0V High-Side Output Voltage Low-Side Output Voltage High-Side Output Drive Soure Current(5)
(5)
Striking, Foscb=300Hz Normal, Fosc=100kHz Striking, Foscb=300Hz Normal Fosc=100kHz Foscb=300Hz Striking, OLR=2.5V Normal, OLR=2.5V
1.7 100 1.7 100 1.7 1.7 100
ENABLE SECTION
2 0.2 VFB=1V, RT=27k VFB=0V, RT=27k 48 62 -0.5 -0.5 -0.5 -0.5 5.5 5.5 VIN=18V VIN=18V VIN=18V VIN=18V VIN=18V, Cload=4.7nF VIN=18V, Cload=4.7nF VIN=18V, Cload=4.7nF VIN=18V, Cload=4.7nF 6.0 6.0 530 530 530 530 100 100 100 100 430 1.0 50 65
5 0.7 4.0 52 68 0.5 0.5 0.5 0.5 6.5 6.5
V V A KHz KHz V V V V V V mA mA mA mA nsec nsec nsec nsec nsec
OUTPUT SECTION
High-Side Output Drive Sink Current(5) Low-Side Output Drive Soure Current Low-Side Output Drive Sink Current High-Side Output Rising Time(5) High-Side Output Falling Time(5) Low-Side Output Rising Time Dead Time
(5) (5)
Low-Side Output Falling Time(5)
Notes: 5. These parameters, although guaranteed, are not 100% tesed in production. 6. Output frequency is half fosc.
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 6 www.fairchildsemi.com
FAN7313 LCD Backlight Inverter Drive IC
Timing Diagram
CMP CT
CLK
T
OUTH
OUTL
FAN7313 Rev. 01
Figure 3. Push-Pull PWM Control Waveforms
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 7
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FAN7313 LCD Backlight Inverter Drive IC
Typical Application Circuits
Application
19-inch LCD Monitor
Lamps
4
Input Voltage
13V
1. Schematic
F1 FUSE C1 220u
0 OLP3 OLP4 OLR 0 0 0 0
C2 1u
0
C3 1u
0
R28 33 R2 100k R3 100k C5 10n R1 27k M1
VS SCP VB BCT/FT OUTH OLP3 OLP4 OLR VIN RT
R29 33 C25 2.2n
TX1
1 HOT
CN1 CCFL
2 COLD
C24 2.2n
1
DN
HOT
0
SN
CN2 CCFL C22 330p D2 R4 1k
0
TX1 1 HOT
SS_CMP
IC1 FAN7313
OLP1 OLP2
GN
DN
C8 15p
2
COLD
OUTL
BDIM
ADIM
VREF
GND
ENA
0
C9 15p
FB
SN
DN
OLP1
D3 C11 12n
0
OLP2
CN5
1 2 3 4 5 6 7 8 9 10 ??
GN
DN
C12 33n R8 100k
0 R9 100k 0
HUFA76413DK8 C13 1u
0
BAV70
C10 12n
0
R5 1k
0
BAV70
R6 680
0
R7 680
0
R22
0
REF
OLP1 OLP2
R13 10K R12 120k
100k C23 10n
0
R23 100k
0
1 HOT
CN4 CCFL
2 COLD
R10 10k
C14 10n
0
R11 8.2k
0
CN3 CCFL C15 15p C16 15p
2 COLD
OLP3
R20 10k C17 10n
0
OLP4
D4
D5 R14 1k
0
OLR
C21 4.7n BAV70 R18 100k
C18 12n
0
R15 1k
0
C19 12n
0
BAV70
R16 680
0
R17 680
0
R21 8.2k
0
C20 1n
0
R19 10k
0
FAN7313 Rev:00
Figure 4. Typical Application Circuit
2. Transformer Schematic Diagram
Supported by Namyang electronics (http://www.namyangelec.co.kr).
FAN7313 Rev. 00
Figure 5. Transformer Schematic
3. Core & Bobbin
Core: EFD2124 Material: PL7 Bobbin: EFE2124
4. Winding Specification Pin No.
6 --> 4 3 --> 5 7 --> 9
Wire
1 UEW 0.35 1 UEW 0.35 1 UEW 0.04
Turns
19 19 2300
Inductance
50H 50H 826mH
Leakage Inductance
1.2H 1.2H 260mH
Remarks
1KHz, 1V 1KHz, 1V 1KHz, 1V
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 8
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FAN7313 LCD Backlight Inverter Drive IC
5. BOM of the Application Circuit
Part Ref.
F1 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R28 R29 C2 C3 C5 C8 C9
Value
Fuse
Description / Vendor
Fuse 1608 J 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 F 1608 J 1608 J 1608 J 1608 J 1608 J 1608 J 3216 J 3216 J 50V 2012 K 50V 2012 K 50V 1608 K 3KV 3216 3KV 3216
Part Ref.
C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 D2 D3 D4 D5 C1
Value
12nF 12nF 33nF 1F 10nF 15pF 15pF 10nF 12nF 12nF 1nF 4.7nF 330pF 10nF 2.2nF 2.2nF
Description / Vendor
50V 1608 K 50V 1608 K 50V 1608 K 50V 2012 K 50V 1608 K 3KV 3216 3KV 3216 50V 1608 K 50V 1608 K 50V 1608 K 50V 1608 K 50V 1608 K 50V 2012 K 50V 1608 K 50V 2012 K 50V 2012 K Fairchild Fairchild Fairchild Fairchild 25V
24V 3A
Resistor (SMD)
27k 100k 100k 1k 1k 680 680 100k 100k 10k 8.2k 120k 10k 1k 1k 680 680 100k 10k 10k 8.2k 100k 100k 33 33
Capacitor (SMD)
Diode / TR (SMD)
BAV70 BAV70 BAV70 BAV70 220F
MOSFET (SMD)
Electrolytic Capacitor
M1
HUFA 76413DK8
Wafer (SMD)
Fairchild
CN1 CN2 CN3 CN4 CN5 TX1 TX2
35001WR-02A 35001WR-02A 35001WR-02A 35001WR-02A 12505WR-10
Transformer (SMD)
1F 1F 10nF 15pF 15pF
EFD2124 EFD2124
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 9
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FAN7313 LCD Backlight Inverter Drive IC
Package Dimensions
20-SOIC
Dimensions are in millimeters unless otherwise noted.
Symbol A A1 B C D E e H h L N ccc Notes:
Inches Min. Max.
Millimeters Min. Max.
Notes
.093 .104 .004 .012 .013 .020 .009 .013 .496 .512 .291 .299 .050 BSC .394 .010 .016 20 0 8 .004 .419 .029 .050
2.35 2.65 0.10 0.30 0.33 0.51 0.23 0.32 12.60 13.00 7.40 7.60 1.27 BSC 10.00 0.25 0.40 20 0 8 0.10 10.65 0.75 1.27
5 2 2
3 6
1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. "D" and "E" do not include mold flash. Mold flash or protrusions shall not exceed .010 inch (0.25mm). 3. "L" is the length of terminal for soldering to a substrate. 4. Terminal numbers are shown for reference only. 5. "C" dimension does not include solder finish thickness. 20 11 6. Symbol "N" is the maximum number of terminals.
E
H
1
10
D h x 45 A e B A1 C SEATING PLANE -C- LEAD COPLANARITY ccc C L
January 2001, Rev. A
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 10
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FAN7313 LCD Backlight Inverter Drive IC
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LIFE SUPPORT POLICY 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 Advance Information Product Status Formative or In Design First Production Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. 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. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice to improve design. This datasheet contains specifications on a product that has been discontinued by Fairchild Semiconductor. The datasheet is printed for reference information only.
Rev. I20
Preliminary
No Identification Needed
Full Production
Obsolete
Not In Production
(c) 2006 Fairchild Semiconductor Corporation FAN7313 Rev. 1.0.0 11
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