FAN7313 FAIRCHILD | Alldatasheet
Document overview
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Technical content
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 mod- ulation (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.
Ordering Information
Part Number Package Pb-Free Operating Temperature Range Packing Method FAN7313M 20-SOIC Yes -25°C ~ 85°C Rail FAN7313MX 20-SOIC Yes Tape & Reel
Figure 1. Functional Block Diagram of FAN7313
Figure 2. Pin Configuration (Top View)
1 OLP1 Open-Lamp Protection 1 11 V IN Supply Voltage
2 OLP2 Open-Lamp Protection 2 12 V B Connected to VREF Internally
3 CMP Error Amplifier Output 13 OUTH High-Side Driver Output
4 FB Error Amplifier Input 14 V S Connected to GND Internally
5 BDIM Burst Dimming Input 15 SCP Short-Circuit Protection
6 ADIM Analog Dimming Input 16 RT Timing Resistor
8 GND Ground 18 OLR Open-Lamp Regulation
9 OUTL Low-Side Driver Output 19 OLP4 Open-Lamp Protection 4
10 V REF Reference Voltage 20 OLP3 Open-Lamp Protection 3
FAN7313 LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7313 Rev. 1.0.0 4 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=25°C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25°C ≤ TA ≤ 85°C and 4.5V ≤ VIN ≤ 25.5V, unless otherwise specified. Notes: 2. Assume no ambient airflow. Pin Breakdown Voltage Symbol Characteristics Value Unit VIN Supply Voltage 25.5 V TA Operating Temperature Range -25 ~ 85 °C TJ Junction Temperature 150 °C TSTG Storage Temperature Range -65 ~ 150 °C θJA Thermal Resistance Junction-to-Ambient (1)(2) 70 °C/W PD Power Dissipation 1.8 W No Name Max. Unit No Name Max. Unit 1O L P 1 1 0 V 11 V IN 25.5 V 2O L P 2 1 0 1 2 V B 10 3C M P 4 1 3 O U T H 6 4F B 1 0 1 4 V S
5 BDIM 10 15 SCP 10
7 ENA 10 17 BCT/FT
9O U T L 6 1 9 O L P 4 1 0 10 V REF 10 20 OLP3 10
FAN7313 LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7313 Rev. 1.0.0 5
Electrical Characteristics
For typical values, TA=25°C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25°C ≤ TA ≤ 85°C and 4.5V ≤ VIN ≤ 18V, unless otherwise specified. Specifications to -25°C ~ 85°C are guaranteed by design based on final characterization results. Notes: 3. These parameters, although guranteed, are not 100% tesed in production. 4. These parameters, although guranteed, are tested in only EDS test. Symbol Characteristics Test Condition Min. Typ. Max. Unit REFERENCE SECTION V6 6V Regulation Voltage 5.76 6.00 6.24 V V6line 6V Line Regulation 0 0.1 V V6load 6V Load Regulation 0<I6<10mA 0 0.1 V OSCILLATOR SECTION (MAIN) fosc Oscillation Frequency(4) TA=25°C, RT=27kΩ 97.5 100.0 103.7 KHz RT=27kΩ 96 100 104 KHz Vcth CT High-Voltage(3) 2.0 V Vctl CT Low-Voltage(3) 0.5 V fstr Striking Frequency(4) TA=25°C, RT=27kΩ 125.7 130 135.6 kHz RT=27kΩ 124 130 136 KHz Tstoff Strike-Off Delay Time 4 ms Vfbth FB Threshold Voltage ADIM=1 0.35 0.45 0.55 V OSCILLATOR SECTION (BURST) foscb Oscillation Frequency TA=25°C, BCT/FT=10nF, RT=27kΩ 301.6 318 332.5 Hz BCT/FT=10nF, RT=27kΩ 296 318 340 Hz Vbcth BCT/FT High-Voltage BCT/FT=10nF, RT=27k Ω 1.9 2.0 2.1 V Vbctl BCT/FT Low-Voltage BCT/FT=10nF, RT=27k Ω 0.4 0.5 0.6 V Vbctft BCT/FT Fault-Voltage 3.5 4.0 4.5 V ERROR AMPLIFIER SECTION Gm Error Amplifier Transconductance(3) ADIM=1~2.2V 100 360 600 µmho AV Error Amplifier Open-Loop Gain(3) 59 dB V2p2 2.2V Regulation Voltage TA=25°C, ADIM > 2.2V 2.119 2.150 2.195 V ADIM > 2.2V 2.086 2.150 2.215 V Iss Soft-Start Current CMP=2V, FB < 0.45*ADIM -3.2 -1.7 -1.2 µA lsin CMP Sink Current CMP=1V, ADIM < FB 44 73 100 µA lsur CMP Source Current CMP=1V, 0.45*ADIM < FB < ADIM -67 50 -33 µA Gmolr OLR Transconductance(3) 300 719 1300 µmho Iolr Open-Lamp Regulation Current Striking, OLR=2.5V 60 190 300 µA Normal, OLR=2.5V 60 260 400 µA UNDER-VOLTAGE LOCK OUT SECTION Vth Start Threshold Voltage 3.9 4.2 4.5 V Vthhys Start Threshold Voltage Hysterisis 0.20 0.45 0.60 V Ist Start-up Current V IN=Vth-0.2 20 55 120 µA Iop Operating Supply Current Not switching 0.5 1.5 2.5 mA Isb Stand-by Current ENA=0 60 100 150 µA
FAN7313 LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7313 Rev. 1.0.0 6 Electrical Characteristics (Continued) For typical values TA=25°C and VIN=18V. For min./max. values, TA is the operating ambient temperature range with -25°C ≤ TA ≤ 85°C and 4.5V ≤ VIN ≤ 18V, unless otherwise specified. Specifications to -25°C ~ 85°C are guaranteed by design based on final characterization results. Notes: 5. These parameters, although guaranteed, are not 100% tesed in production. 6. Output frequency is half fosc. Symbol Characteristics Test Condition Min. Typ. Max. Unit PROTECTION SECTION Vscp Short-Circuit Protection Voltage FB=OLP=2V 1.9 2.0 2.1 V Vcmpr CMP Protection Voltage 2.1 2.3 2.5 V Volp Open-Lamp Protection Voltage 0.95 1.00 1.08 V Vovp Over-Voltage Protection 2.85 3.00 3.15 V Volr Open-Lamp Regulation Voltage 1.9 2.0 2.1 V Volrhy Opem-Lamp Regulation Hystersis(5) 250 mV Tscp Short-Circuit Protection Delay Striking, Foscb=300Hz 1.7 2.0 2.3 µsec Normal, Fosc=100kHz 100 300 500 µsec Tcmp CMP Protection Delay Striking, Foscb=300Hz 1.7 2.0 2.3 sec Normal Fosc=100kHz 100 300 500 µsec Tolp Open-Lamp Protection Delay F oscb=300Hz 1.7 2.0 2.3 sec Tolr Open-Lamp Regulation Delay Striking, OLR=2.5V 1.7 2.0 2.3 sec Normal, OLR=2.5V 100 300 500 µsec TSD Thermal Shutdown 150 °C ENABLE SECTION Vena Enable State Input Voltage 2 5 V Vdis Disable State Input Voltage 0.7 V Iena Enable Discharge Current 0.2 1.0 4.0 µA OUTPUT SECTION fnrmo Output Normal Frequency(6) VFB=1V, RT=27kΩ 48 50 52 KHz fstro Output Striking Frequency(6) VFB=0V, RT=27kΩ 62 65 68 KHz Vuvh High-Side Output Voltage Before Start-up -0.5 0.5 V Vuvl Low-Side Output Voltage Before Start-up -0.5 0.5 V Venh High-Side Output Voltage at Vena=0V -0.5 0.5 V Venl Low-Side Output Voltage at Vena=0V -0.5 0.5 V OUTH High-Side Output Voltage 5.5 6.0 6.5 V OUTL Low-Side Output Voltage 5.5 6.0 6.5 V Idsurh High-Side Output Drive Soure Current(5) VIN=18V 530 mA Idsinh High-Side Output Drive Sink Current(5) VIN=18V 530 mA Idsurl Low-Side Output Drive Soure Current(5) VIN=18V 530 mA Idsinl Low-Side Output Drive Sink Current(5) VIN=18V 530 mA trh High-Side Output Rising Time(5) VIN=18V, Cload=4.7nF 100 nsec tfh High-Side Output Falling Time(5) VIN=18V, Cload=4.7nF 100 nsec trl Low-Side Output Rising Time(5) VIN=18V, Cload=4.7nF 100 nsec tfl Low-Side Output Falling Time(5) VIN=18V, Cload=4.7nF 100 nsec tdead Dead Time 430 nsec
Figure 3. Push-Pull PWM Control Waveforms
FAN7313 LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7313 Rev. 1.0.0 9 5. BOM of the Application Circuit Part Ref. Value Description / Vendor Part Ref. Value Description / Vendor Fuse C10 12nF 50V 1608 K F1 24V 3A Fuse C11 12nF 50V 1608 K Resistor (SMD) C12 33nF 50V 1608 K R1 27k Ω 1608 J C13 1µF 50V 2012 K R2 100k Ω 1608 F C14 10nF 50V 1608 K R3 100k Ω 1608 F C15 15pF 3KV 3216 R4 1k Ω 1608 F C16 15pF 3KV 3216 R5 1k Ω 1608 F C17 10nF 50V 1608 K R6 680 Ω 1608 F C18 12nF 50V 1608 K R7 680 Ω 1608 F C19 12nF 50V 1608 K R8 100k Ω 1608 F C20 1nF 50V 1608 K R9 100k Ω 1608 F C21 4.7nF 50V 1608 K R10 10k Ω 1608 F C22 330pF 50V 2012 K R11 8.2k Ω 1608 F C23 10nF 50V 1608 K R12 120k Ω 1608 F C24 2.2nF 50V 2012 K R13 10k Ω 1608 F C25 2.2nF 50V 2012 K R14 1k Ω 1608 F Diode / TR (SMD) R15 1k Ω 1608 F D2 BAV70 Fairchild R16 680 Ω 1608 F D3 BAV70 Fairchild R17 680 Ω 1608 F D4 BAV70 Fairchild R18 100k Ω 1608 J D5 BAV70 Fairchild R19 10k Ω 1608 J Electrolytic Capacitor R20 10k Ω 1608 J C1 220µF 25V R21 8.2k Ω 1608 J MOSFET (SMD) R22 100k Ω 1608 J M1 HUFA 76413DK8 Fairchild R23 100k Ω 1608 J Wafer (SMD) R28 33 Ω 3216 J CN1 35001WR-02A R29 33 Ω 3216 J CN2 35001WR-02A Capacitor (SMD) CN3 35001WR-02A C2 1µF 50V 2012 K CN4 35001WR-02A C3 1µF 50V 2012 K CN5 12505WR-10 C5 10nF 50V 1608 K Transformer (SMD) C8 15pF 3KV 3216 TX1 EFD2124 C9 15pF 3KV 3216 TX2 EFD2124
FAN7313 LCD Backlight Inverter Drive IC © 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN7313 Rev. 1.0.0 10 Package Dimensions 20-SOIC Dimensions are in millimeters unless otherwise noted. January 2001, Rev. A A .093 .104 2.35 2.65 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 .004 .012 0.10 0.30 .020 0.51B .013 0.33 C .009 .013 0.23 0.32 E .291 .299 7.40 7.60 e .394 .419 10.00 10.65 .010 .029 0.25 0.75 H .050 BSC 1.27 BSC h L .016 .050 0.40 1.27 0° 8° 0° 8° N2 0 2 0 α ccc .004 0.10 D .496 .512 12.60 13.00 Notes: Dimensioning and tolerancing per ANSI Y14.5M-1982. "D" and "E" do not include mold flash. Mold flash or protrusions shall not exceed .010 inch (0.25mm). "L" is the length of terminal for soldering to a substrate. Terminal numbers are shown for reference only. "C" dimension does not include solder finish thickness. Symbol "N" is the maximum number of terminals.20 D A A1 – C – ccc C LEAD COPLANARITY SEATING PLANEe B L h x 45° C α EH
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