Global Mixed-mode Technology Inc. G5562 Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs Features General Description The G5562 DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TQFN package. One step-up converter, one step-down converter, and two charge pumps convert the 8V to 14V input voltage into four output voltages. These features complete the powersupply requirements of large screen LCD panels. The step-up converter provides source voltages VS and the step-down converter provides logic voltage for the system. The dual charge pumps independently generate adjustable regulated output voltages VGL and VGH to bias the LCD. These four blocks operate with a fixed switching frequency of 500kHz or 750kHz. 8V to 14V Input Voltage Range 500kHz/750kHz Fixed Switching Frequency VS Step-Up Converter Current Mode 1% Feedback Accuracy Output Voltage Range up to 20V 3A Switch Current Adjustable Soft Start Adjustable Current Limit VLOGIC Step-Down Converter Current Mode 1% Feedback Accuracy 2.5A Switch Current 2.5ms Internal Soft Start 150mA Negative Charge Pump Driver for VGL 150mA Positive Charge Pump Driver for VGH Integrated High Voltage Switch for Gate Voltage Shaping High Voltage LDO for VREF 0.5% Feedback Accuracy 0.5V Dropout at 60mA Output Current High-Speed Operational Amplifier 20MHz -3dB Bandwidth 45 V/µs Slew Rate ±200-mA Short-Circuit Current Gate Drive Signal to Drive External MOSFET XAO Comparator Thermal Shutdown Available in 7mmx7mm 48-pin TQFN Package Both step-up and step-down converters operate in asynchronous switch mode. Current mode control provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current limit, thermal shutdown, and output-fault shutdown. Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes. High voltage switch is used for gate voltage shaping to improve TFT-LCD display quality. The G5562 includes one high-speed high-current operational amplifier and one high-accuracy LDO for Gamma buffer reference. Applications The G5562 is available in a 48-pin TQFN package. LCD TV Panels Ordering Information ORDER NUMBER G5562R11U Note: R1: TQFN7X7-48 1: Bonding Code U: Tape & Reel MARKING TEMP. RANGE PACKAGE (Green) 5562 -40°C~ +85°C TQFN7X7-48 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Mar 03, 2011 1 G5562 Global Mixed-mode Technology Inc. GND SUPN DRN VGHM VGH FBP DLY1 43 42 41 40 39 38 37 45 DRVN FBN 46 44 VREF_FB REF 47 VREF_O 48 Pin Configuration 36 DRVP 35 CPGND 3 34 SUPP 4 33 THR 5 32 COMP VREF_I 1 VOP 2 OGND OPP OPN OPO 6 XAO 7 49 GND Thermal Pad 31 FB 30 GD GVOFF 8 29 GD_I EN 9 28 PGND 10 27 PGND FBB SS 24 CLIM 23 FSEL 22 VL 21 INVL 20 VDET 19 GND 18 IN2 17 SW IN2 16 SW 25 NC 15 26 12 SWB 14 11 NC SWB 13 OUT G5562 TQFN7X7-48 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.2 Mar 03, 2011 2 G5562A Global Mixed-mode Technology Bias Power Supply with High-Speed Amplifier and High-Accuracy LDO for LCD TVs Features General Description The G5562A DC-DC converter provides regulated voltages required by thin-film transistor (TFT) liquid crystal displays (LCD) panels in TQFN package. One step-up converter, one step-down converter, and two charge pumps convert the 8V to 14V input voltage into four output voltages. These features complete the powersupply requirements of large screen LCD panels. The step-up converter provides source voltages VS and the step-down converter provides logic voltage for the system. The dual charge pumps independently generate adjustable regulated output voltages VGL and VGH to bias the LCD. These four blocks operate with a fixed switching frequency of 500kHz or 750kHz. 8V to 14V Input Voltage Range 500kHz/750kHz Fixed Switching Frequency VS Step-Up Converter Current Mode 1% Feedback Accuracy Output Voltage Range up to 20V 3A Switch Current Adjustable Soft Start Adjustable Current Limit VLOGIC Step-Down Converter Current Mode 1% Feedback Accuracy 2.5A Switch Current 2.5ms Internal Soft Start 150mA Negative Charge Pump Driver for VGL 150mA Positive Charge Pump Driver for VGH Integrated High Voltage Switch for Gate Voltage Shaping High Voltage LDO for VREF 0.5% Feedback Accuracy 0.5V Dropout at 60mA Output Current High-Speed Operational Amplifier 20MHz -3dB Bandwidth 45 V/µs Slew Rate ±200-mA Short-Circuit Current Gate Drive Signal to Drive External MOSFET XAO Comparator Thermal Shutdown Available in 7mmx7mm 48-pin TQFN Package Both step-up and step-down converters operate in asynchronous switch mode. Current mode control provides fast transient response and eases loop stabilization. Fault protection includes cycle-by-cycle current limit, thermal shutdown, and output-fault shutdown. Current mode control is used for both charge pumps to regulate its output voltage, which minimizes output ripple and capacitor sizes. High voltage switch is used for gate voltage shaping to improve TFT-LCD display quality. The G5562A includes one high-speed high-current operational amplifier and one high-accuracy LDO for Gamma buffer reference. Applications The G5562A is available in a 48-pin TQFN package. LCD TV Panels Ordering Information ORDER NUMBER G5562AR11U Note: R1: TQFN7X7-48 1: Bonding Code U: Tape & Reel MARKING TEMP. RANGE PACKAGE (Green) 5562A -40°C~ +85°C TQFN7X7-48 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Dec 20, 2011 1 G5562A Global Mixed-mode Technology GND DRVN SUPN DRN VGHM VGH FBP DLY1 42 41 40 39 38 37 FBN 45 43 REF 46 44 VREF_O VREF_FB 48 47 Pin Configuration VREF_I 1 36 DRVP VOP 2 35 CPGND OGND 3 34 SUPP OPP 4 33 THR OPN 5 32 COMP OPO 6 XAO 7 GVOFF 49 GND Thermal Pad SW NC 12 25 SW SS 24 11 CLIM 23 OUT FSEL 22 PGND 26 VL 21 PGND 27 INVL 20 28 VDET 19 9 10 GND 18 EN FBB IN2 17 GD_I NC 15 29 IN2 16 8 SWB 14 FB GD SWB 13 31 30 G5562A TQFN7X7-48 Note: Recommend connecting the Thermal Pad to the Ground for excellent power dissipation. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 0.4 Dec 20, 2011 2