FAN7300G

www.fairchildsemi.com FAN7300 LCD Back Light Inverter Drive IC Features Description • • • • • • • • • • • • • • The FAN7300 provides all the control functions for a series parallel resonant converter and also contains a pulse width modulation (PWM) controller to develop a supply voltage. Typical operating frequency range is between 30kHz and 100kHz depending on the CCFL and the transformer's characteristics. High Efficiency Single Stage Power Conversion Wide Input Voltage Range 6V to 25V Back Light Lamp Ballast and Soft Dimming Few External Components Precision Voltage Reference Trimmed to 2% Soft Start PWM and PFM Control Analog, Burst and Mixed Dimming Function Allows All N-Channel MOSFET Drive Double Pulse Suppression Logic Open Lamp Detection Output Short Circuit Protection Open Lamp Regulation 20 Pin SSOP 20-SSOP Rev. 1.0.0 ©2003 Fairchild Semiconductor Corporation FAN7300 Internal Block Diagram 3V VZ Vz 8V Internal Bias V3 1.5Vref COMP6 SCP + UVLO Vcc + - 3.7V 3V ENA R 2uA Q 5.4V Vz S COMP7 + OLP 3.7V 3V Vm2 VS Multiplier Gain + 1.5V Vz K S_S + Va COMP1 - Vmo 8uA Error Amp. + Buffer R Q S Q Vm1 + High side gate driver OUT_H - EA_IN CPUMP OUT_L Low side gate driver Clock GND E/A Controller Main Control Oscillator max. 1.75V EA_OUT Rt min. 0.25V COMP3 OLR Current Generator + Ct - max. 1.75V 3V COMP2 min. 0.25V - Va BCt Vb + COMP4 V3 + Dimming control and Mode Selection 50K 1.5V - DIM_MODE DIM 50K Burst Mixed COMP5 + Analog 1.5V 2 FAN7300 18 SCP OLR VZ OUT_H 19 EA_IN CPUMP 20 DIM EA_OUT V3 DIM_MODE Pin Assignments 17 16 15 14 13 12 11 FAN7300 1 2 3 4 5 6 7 8 9 10 OLP Rt Ct BCt S_S ENA VS VCC GND OUT_L Pin Definitions No Name 1 OLP Function Description Open Lamp Protection No Name 11 OUT_H Function Description High Side Gate Drive Output 2 Rt Timing Resistor 12 CPUMP Charge Pump 3 Ct Timing Capacitor 13 VZ Zener Voltage 4 BCt Burst Dimming Timing Capacitor 14 OLR Open Lamp Regulation 5 S_S Soft Start 15 SCP Short Circuit Protection 6 ENA Enable Input 16 EA_IN 7 VS Voltage Sensing 17 EA_OUT 8 VCC Supply Voltage 18 DIM 9 GND Ground 19 DIM_MODE 10 OUT_L Low Side Gate Drive Output 20 V3 Error Amplifier Input Error Amplifier Output Dimming Input Dimming Mode Selection 3V Reference Voltage 3 FAN7300 Absolute Maximum Ratings Vcc=10V, for typical values Ta=25°C, for min/max values Ta is the operating ambient temperature range with -25°C ≤ Ta ≤ 85°C and 6V ≤ Vcc ≤ 25V, unless otherwise specified. Characteristics Symbol Value Unit Supply Voltage VCC 6 ~ 25 V Operating Temperature Range Topr -25 ~ 85 °C Storage Temperature Range Tstg -65 ~ 150 °C Thermal Resistance Junction-Air (Note1,2) RθJA 112 °C/W Pd 1.1 W Power Dissipation Note: 1. Thermal resistance test board Size: 76.2mm * 114.3mm * 1.6mm(1S0P) JEDEC standard: JESD51-3, JESD51-7 2. Assume no ambient airflow 4 FAN7300 Electrical Characteristics Vcc=10V, for typical values Ta=25°C, for min/max values Ta is the operating ambient temperature range with -25°C ≤ Ta ≤ 85°C and 6V ≤ Vcc ≤ 25V, unless otherwise specified. Characteristics Symbol Test Condition Min. Typ. Max. Unit Vref - 1.46 1.5 1.54 V REFERENCE SECTION Reference Voltage Line Regulation 3V Regulation Voltage ∆Vref 8 ≤ VCC ≤ 20V V3 - - 2 25 mV 2.86 2.96 3.06 V 75 95 115 kHz OSCILLATOR SECTION(MAIN) Oscillation Frequency fosc Ct = 330pF, Rt = 14k CT High Voltage Vcth - - 1.75 - V CT Low Voltage Vbct1 - - 0.25 - V 125 170 205 Hz OSCILLATOR SECTION(BURST) Oscillation Frequency fosc Ctb = 180nF BCT High Voltage Vbcth - - 1.75 - V BCT Low Voltage Vbct1 - - 0.25 - V 3.2 3.7 4.2 V ERROR AMP SECTION Feedback Output High Voltage Veh EA_IN = 0V Output Sink Current lsin EA_OUT = 2.2V - - -1 mA Output Source Current lsur EA_OUT = 2.2V 1 - - mA Feedback High Voltage On Burst Dimming Vfbh R(EA_IN) = 50kΩ Va+0.7 V Va+0.1 Va+0.4 MULTIPLIER SECTION Multiplier Input Voltage High Multiplier Gain Vmih - 1.4 1.6 1.8 V K - - 0.85 - 1/V 5 8.3 11.6 uA SOFT START SECTION Soft Start Current Soft Start Clamping Voltage ISS S_S=2V Vssh - 3 3.7 4.4 V Open Lamp Protection Voltage Vpr - 2.5 3 3.5 V Short Circuit Protection Voltage Vsc - 2.5 3 3.5 V Open Lamp Regulation Vor - 2.5 3 3.5 V PROTECTION SECTION 5 FAN7300 Electrical Characteristics (Continued) Vcc=10V, for typical values Ta=25°C, for min/max values Ta is the operating ambient temperature range with -25°C ≤ Ta ≤ 85°C and 6V ≤ Vcc ≤ 25V, unless otherwise specified. Characteristics Symbol Test Condition Min. Typ. Max. Unit Dim_Mode > 2V, Dim = 0 -0.5 0 0.5 V Vaah Dim_Mode > 2V, Dim = 3V 2.5 3 3.5 V Vba Dim_Mode > 2V - 3 - V Vbbl Dim_Mode < 1V, Dim = 0 -0.5 0 0.5 V Vbbh Dim_Mode < 1V, Dim = 3V 2.1 2.5 2.9 V Vab Dim_Mode < 1V 2.45 2.85 3.25 V DIMMING SECTION Vaal Analog Dimming Range Burst Dimming Range Vaml Dim_Mode = 1.5V, Dim = 0 1.2 1.4 1.6 V Vamh Dim_Mode = 1.5V, Dim = 3V 2.5 3 3.5 V Vbml Dim_Mode = 1.5V, Dim = 0 -0.5 0 0.5 V Vbmh Dim_Mode = 1.5V, Dim = 3V 2.5 3 3.5 V Vsa - 1.5 2 2.5 V Burst Dimming Select Voltage Vsb - 0.7 1 1.3 V Mixed Dimming Select Voltage Vsm - 1.3 1.5 1.7 V - 4.8 5.4 6.0 V 250 uA Mixed Dimming Range Analog Dimming Select Voltage UNDER VOLTAGE LOCK OUT SECTION Start Threshold Voltage Vth Start Up Current Ist VCC = 4.5V - 150 Operating Supply Current Iop VCC = 10V - 8.5 11 mA Stand-by Current Isb VCC = 12V - 80 150 uA 0.7 - - V ON/OFF SECTION On State Input Voltage Von - OUTPUT SECTION 6 Output High Voltage Voh VCC = 7V 5 - - V Output Low Voltage Vol VCC = 7V - - 0.2 V Output Voltage With UVLO Activated Vuv VCC = 4.5V - - 0.9 V Output High Clamping Voltage Vohc VCC = 20V 11 13.5 16 V Rising Time Tr VCC = 7V - 100 200 ns Falling Time Tf VCC = 7V - 50 200 ns FAN7300 Typical Performance Characteristics Startup Voltage 5.6 9 5.4 Vth [V] ICC [mA] Supply Current vs Supply Voltage 12 6 5.2 5.0 3 4.8 -40 0 0 5 10 15 20 25 -20 0 20 40 60 80 100 VCC [V] Temp TEMP [? ] [°C] Figure 1. Supply Current vs. Supply Voltage Figure 2. Start up Voltage 120 140 120 140 120 140 3V Reference Voltage Start Up Current 3.00 80 2.98 60 V3 [V] Ist [uA] 2.96 40 2.94 20 2.92 0 -40 -20 0 20 40 60 80 100 120 2.90 -40 140 -20 0 20 Figure 3. Start up Current 10 100 8 80 6 40 2 20 20 40 60 100 60 4 0 80 Standby Current 120 Isb [uA] Iop [mA] Operating Supply Current -20 60 Figure 4. 3V Reference Voltge 12 0 -40 40 Temp [°C] TEMP [? ] Temp TEMP[°C] [? ] 80 100 120 Temp [°C] TEMP [? ] Figure 5. Operating Supply Current 140 0 -40 -20 0 20 40 60 80 100 Temp TEMP [? [°C] ] Figure 6. Stand by Current 7 FAN7300 Typical Performance Characteristics (Continued) Soft Start Current On State Input Voltage 10 2.0 1.8 9 1.6 8 Iss [uA] Von [V] 1.4 1.2 7 1.0 6 0.8 0.6 -40 -20 0 20 40 60 80 100 120 5 -40 140 -20 0 20 40 60 80 100 120 140 Temp[?[°C] TEMP ] Temp TEMP[°C] [? ] Figure 8. Soft Start Current Figure 7. On State Input Voltage Oscillator Frequency (Burst) Ocillastion Frequency (main) 200 110 180 Fbosc [Khz] Fosc [Khz] 100 90 160 140 120 80 -40 -20 0 20 40 60 80 100 120 100 -40 140 -20 0 20 7.0 0.20 6.5 0.15 Vol [V] Voh [V] 80 100 120 140 Output Low Voltage Output High Voltage 6.0 0.10 0.05 5.5 -20 0 20 40 60 80 100 Temp [°C] TEMP [? ] Figure 11. Output High Voltage 8 60 Figure 10. Ocillastion Frequency (Burst) Figure 9. Ocillastion Frequency (main) 5.0 -40 40 Temp [°C] TEMP [? ] Temp [°C] TEMP [? ] 120 140 0.00 -40 -20 0 20 40 60 80 100 Temp TEMP[°C] [? ] Figure 12. Output Low Voltage 120 140 FAN7300 Typical Performance Characteristics (Continued) Output Voltage with UVLO Activated Output High Clamping Voltage 0.7 15.0 0.6 14.5 0.5 0.4 Vuv [V] Vohc [V] 14.0 13.5 0.3 13.0 0.2 12.5 12.0 -40 0.1 -20 0 20 40 60 80 100 120 0.0 -40 140 -20 0 20 3.4 3.2 3.2 Vsc [V] Vpr [V] 3.4 3.0 2.8 2.6 2.6 20 40 Temp [°C] 60 100 120 140 3.0 2.8 0 80 Short Circuit Protection Voltage Open Lamp Protection Voltage -20 60 Figure 14. Output Voltage With UVLO Activated Figure 13. Output High Clamping Voltage -40 40 Temp TEMP[°C] [? ] Temp [°C] TEMP [? ] 80 100 120 -40 140 -20 0 20 40 60 80 100 120 140 Temp TEMP[°C] [? ] TEMP [? ] Figure 16. Short Circuit Protection Voltage Figure 15. Open Lamp Protection Voltage Error Amp. Output High Voltage Open Lamp Regulation Voltage 4.4 3.50 4.2 4.0 Veh [V] Vor [V] 3.25 3.00 3.8 3.6 3.4 2.75 3.2 2.50 -40 -20 0 20 40 60 80 100 Temp [°C] [? ] TEMP Figure 17. Open Lamp Regulation Voltage 120 140 3.0 -40 -20 0 20 40 60 80 100 120 140 Temp TEMP [? [°C] ] Figure 18. Error Amp Output High Voltage 9 FAN7300 Typical Performance Characteristics (Continued) Output Source Current Output Sink Current 6.0 -2.0 5.5 -2.5 5.0 -3.0 4.5 Isur [mA] Isin [mA] -3.5 -4.0 -4.5 4.0 3.5 3.0 -5.0 2.5 -5.5 2.0 -6.0 -40 -20 0 20 40 60 80 100 Temp [°C] TEMP [? ] Figure 19. Output Sink Current 10 120 140 -40 -20 0 20 40 60 80 100 Temp[?[°C] TEMP ] Figure 20. Output Source Current 120 140 FAN7300 Mechanical Dimensions Package Dimensions in millimeters 20-SSOP 11 FAN7300 Ordering Information Product number Package Operating Temperature FAN7300G 20-SSOP -25°C ~ 85°C DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. 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 THE PRESIDENT 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. www.fairchildsemi.com 4/22/03 0.0m 001 Stock#DSxxxxxxxx  2002 Fairchild Semiconductor Corporation