BD8163EFV-E2 ROHM

Power Supply ICs for TFT-LCD Panels 5V Input Multi-channel System Power Supply ICs No.10035EAT13 BD8163EFV Description The BD8163EFV is a system power supply IC for TFT panels. A 1-chip IC providing a total of four voltages required for TFT panels, i.e., logic voltage, sauce voltage, gate high-level, and gate low-level voltage, thus constructing a TFT panel power supply with minimal components required. Features 1) Operates in an operating voltage range as low as 2.1 V to 6. 0 V. 2) Incorporates a step-up DC/DC converter. 3) Incorporates a 2.5 V regulator. 4) Incorporates positive and negative-side charge pumps. 5) Switching frequency of 1100 kHz 6) DC/DC converter feedback voltage of 1.24 V 1% 7) Incorporates a gate shading function 8) Under-voltage lockout protection circuit 9) Thermal shutdown circuit 10) Overcurrent protection circuit 11) HTSSOP-B24 package Applications Liquid crystal TV, PC monitor, and TFT-LCD panel Absolute maximum ratings (Ta = 25) Parameter Symbol Ratings Unit Power supply voltage VCC 7 V Vo1 voltage Vo1 19 V Vo2 voltage Vo2 32 V SW voltage Vsw 19 V Maximum junction temperature Tjmax 150 Power dissipation Pd 1100* mW Operating temperature range Topr -40 to 125 Storage temperature range Tstg -55 to 150 * Reduced by 4.7 mW/ over 25, when mounted on a glass epoxy board. (70 mm 70 mm 1.6 mm). Recommended Operating Ranges Ratings Parameter Symbol Unit Min. Max. Power supply voltage VCC 2.1 6 V Vo1 voltage Vo1 8 18 V Vo2 voltage Vsw 18 V SW Current Isw 1.8 A Vo2 Current Vo2 30 V www.rohm.com 2010.12 - Rev.A 1/21 2010 ROHM Co., Ltd. All rights reserved. Technical Note BD8163EFV Electrical Characteristics (Unless otherwise specified, VCC = 5 V Vo1 = 15 V Vo2 = 25 V Ta = 25) 1 DC/DC Converter Block Limits Parameter Symbol Unit Conditions Min. Typ. Max. Soft start Source current Iso 6 10 14 A Vss = 0.5 V Sinking current Isi 0.1 0.2 1.0 mA Vss = 0.5 V, VDD = 1.65 V Error amp Input bias current 1 I 0.1 0.5 A FB1 Feedback voltage 1 V 1.227 1.240 1.253 V Buffer FB1 Voltage gain AV 200 V/V * Sinking current IoI 25 50 100 A VFB = 1.5 V VCOMP = 0.5 V Source current Ioo -100 -50 -25 A VFB = 1.0 V VCOMP = 0.5 V SW ON resistance N-channel R 50 200 600 m * ON N Leak current N-channel I 10 A Vsw = 18 V LEAKN Maximum duty cycle D 75 85 95 % MAX Overcurrent protection Saw current limit Insw 2 3 A * 2. Regulator controller Limits Parameter Symbol Unit Conditions Min. Typ. Max. Error amp VDD voltage VDD 2.4 2.5 2.6 V Maximum base current I 2 7 15 mA BMAX Line regulation RegI 10 30 mV Vcc = 4.5 V to 5.5 V Load regulation RegL 10 50 mV Io = 10 mA to 100 mA Under-voltage lockout protection Off threshold voltage V 1.7 1.8 1.9 V ROFF On threshold voltage V 1.6 1.7 1.8 V RON This product is not designed for protection against radioactive rays. * Design guarantee (No total shipment inspection is made.) www.rohm.com 2010.12 - Rev.A 2/21 2010 ROHM Co., Ltd. All rights reserved.