ver: 0.2 mar 03, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5562 global mixed-mode technology inc. bias power supply with high-speed amplifier and high-accuracy ldo for lcd tvs features ? 8v to 14v input voltage range ? 500khz/750khz fixed switching frequency ? v s step-up converter ? current mode ? 1% feedback accuracy ? output voltage range up to 20v ? 3a switch current ? adjustable soft start ? adjustable current limit ? v logic 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 volt- age 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/ s 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 applications ? lcd tv panels general description the G5562 dc-dc converter provides regulated volt- ages 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 power- supply requirements of large screen lcd panels. the step-up converter provides source voltages v s and the step-down converter provides logic voltage for the sys- tem. 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. both step-up and step-down converters operate in asynchronous switch mode. current mode control pro- vides fast transient response and eases loop stabiliza- tion. 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 op- erational amplifier and one high-accuracy ldo for gamma buffer reference. the G5562 is available in a 48-pin tqfn package. ordering information order number marking temp. range package (green) G5562r11u 5562 -40 c~ +85 c tqfn7x7-48 note: r1: tqfn7x7-48 1: bonding code u: tape & reel
ver: 0.2 mar 03, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 2 G5562 global mixed-mode technology inc. pin configuration G5562 tqfn7x7-48 note: recommend connecting the thermal pad to the ground for excellent power dissipation. swb swb gnd vdet invl fsel clim drvp cpgnd supp thr comp fb gd gd_i pgnd pgnd sw sw in2 vl nc in2 ss vref_i vop ognd opp opn opo xao gvoff en fbb out nc vref_o vref_fb ref fbn gnd drvn supn drn vghm vgh dly1 1 2 3 4 5 6 7 8 9 10 11 12 25 26 27 28 29 30 31 32 33 34 35 36 13 14 15 16 17 18 19 20 21 22 23 24 48 43 42 41 40 39 38 37 44 45 47 46 fbp thermal pad 49 gnd G5562 tqfn7x7-48 note: recommend connecting the thermal pad to the ground for excellent power dissipation. swb swb gnd vdet invl fsel clim drvp cpgnd supp thr comp fb gd gd_i pgnd pgnd sw sw in2 vl nc in2 ss vref_i vop ognd opp opn opo xao gvoff en fbb out nc vref_o vref_fb ref fbn gnd drvn supn drn vghm vgh dly1 1 2 3 4 5 6 7 8 9 10 11 12 25 26 27 28 29 30 31 32 33 34 35 36 13 14 15 16 17 18 19 20 21 22 23 24 48 43 42 41 40 39 38 37 44 45 47 46 fbp thermal pad 49 gnd
ver: 0.4 dec 20, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 1 G5562a global mixed-mode technology bias power supply with high-speed amplifier and high-accuracy ldo for lcd tvs features ? 8v to 14v input voltage range ? 500khz/750khz fixed switching frequency ? v s step-up converter ? current mode ? 1% feedback accuracy ? output voltage range up to 20v ? 3a switch current ? adjustable soft start ? adjustable current limit ? v logic 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 volt- age 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/ s 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 applications ? lcd tv panels general description the G5562a dc-dc converter provides regulated volt- ages 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 power- supply requirements of large screen lcd panels. the step-up converter provides source voltages v s and the step-down converter provides logic voltage for the sys- tem. 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. both step-up and step-down converters operate in asynchronous switch mode. current mode control pro- vides fast transient response and eases loop stabiliza- tion. 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. the G5562a is available in a 48-pin tqfn package. ordering information order number marking temp. range package (green) G5562ar11u 5562a -40 c~ +85 c tqfn7x7-48 note: r1: tqfn7x7-48 1: bonding code u: tape & reel
ver: 0.4 dec 20, 2011 tel: 886-3-5788833 http://www.gmt.com.tw 2 G5562a global mixed-mode technology pin configuration G5562a tqfn7x7-48 note: recommend connecting the thermal pad to the ground for excellent power dissipation. swb swb gnd vdet invl fsel clim drvp cpgnd supp thr comp fb gd gd_i pgnd pgnd sw sw in2 vl nc in2 ss vref_i vop ognd opp opn opo xao gvoff en fbb out nc vref_o vref_fb ref fbn gnd drvn supn drn vghm vgh dly1 1 2 3 4 5 6 7 8 9 10 11 12 25 26 27 28 29 30 31 32 33 34 35 36 13 14 15 16 17 18 19 20 21 22 23 24 48 43 42 41 40 39 38 37 44 45 47 46 fbp thermal pad 49 gnd G5562a tqfn7x7-48 note: recommend connecting the thermal pad to the ground for excellent power dissipation. swb swb gnd vdet invl fsel clim drvp cpgnd supp thr comp fb gd gd_i pgnd pgnd sw sw in2 vl nc in2 ss vref_i vop ognd opp opn opo xao gvoff en fbb out nc vref_o vref_fb ref fbn gnd drvn supn drn vghm vgh dly1 1 2 3 4 5 6 7 8 9 10 11 12 25 26 27 28 29 30 31 32 33 34 35 36 13 14 15 16 17 18 19 20 21 22 23 24 48 43 42 41 40 39 38 37 44 45 47 46 fbp thermal pad 49 gnd
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