Power Supply IC Series for TFT-LCD Panels 4-channel System Power Supply + Gamma Buffer Amp IC No.09035EBT03 BD8150KVT Description The BD8150KVT is a system power supply IC that offers a 4-channel power supply with 10 gamma correction output channels and VCOM. The DC/DC block can be switched between step-up and step-down and supports both 5V and 12V input. Features 1) Multi-channel power supply with two DC/DC converter controller channels and two charge pump channels 2) 10channel gamma correction Buffer Amp output and 1channel VCOM 3) High reference voltage accuracy: 1 % 4) Oscillating frequency: 1MHz 5) Built-in UVLO (Under Voltage Lockout) and output short-circuit protection circuits 6) Standby current of 0A (Typ.) 7) Controllable start up sequence 8) TQFP64V package Applications Power supply for LCD monitors and LCD TVs Absolute Maximum Ratings (Ta=25C) Parameter Symbol Rating Unit Power supply voltage VCC 15 V Regulator power supply voltage REGVCC 15 V Driver power supply voltage PVCC 15 V Junction temperature Tjmax 125 C *1 Power dissipation Pd 1000 mW Operating temperature range Topr 30 to 85 C Storage temperature range Tstg 55 to 150 C *1 Derated at 10mW/C at Ta>25C when mounted on a 70.0 mm 70.0 mm 1.6 mm glass epoxy board Operating Conditions (Ta=-30C ~+85C) Limits Parameter Symbol Unit Min. Max. Power supply voltage VCC 2.7 13 V Regulator power supply voltage REGVCC 4.5 14 V Driver power supply voltage PVCC 2.7 13 V www.rohm.com 1/18 2009.07 - Rev.B 2009 ROHM Co., Ltd. All rights reserved. Technical Note BD8150KVT Electrical Characteristics (Unless otherwise specified, VCC = 5 V, REGVCC = 12V, Ta = 25C) Limit Parameter Symbol Unit Conditions Min. Typ. Max. (1) DC/DC converter controller ERR AMP1, 2 Input bias current Ib12 3 0.1 3 A INV = 0.5 V Input offset voltage Vos12 10 0 10 mV Output source current Iesc12 2 0.7 0.2 mA VFB = 1.25 V, INV = 0.5 V, NON = 2.5 V Output sink current Iesk12 0.1 0.3 1 mA VFB = 1.25 V, INV = 1.5 V, NON = 0 V Input voltage range VNON12 0.1 VCC1V Max. output voltage Voh12 1.8 2.1 2.4 V IFB = 0.1 mA Min. output voltage Vol12 0.6 0.8 1.0 V IFB = 0.1 mA Feedback voltage FB1 1.225 1.25 1.275 V ERRAMP1 only (1) PWM and DRV Output sink current Ipsk12 70 130 200 mA GD1, 2 = 5 V Output source current Ipsc12 245 160 85 mA GD1, 2 = 0 V (1) UD Selector High-side threshold voltage Vudh VCC 0.7 VCC V Step-down operation Low-side threshold voltage Vudl 0 VCC 0.3 V Step-up operation (1) Detector 1, 2 High-side threshold voltage 1 Vdeh12 0.9 1.0 1.1 V DET1, 2 L H sweep up VINV Low-side threshold voltage 1 Vdel12 0.6 0.7 0.8 V DET1, 2 H L sweep down VINV High-side threshold voltage 2 Vdeh22 0.1 0.2 0.3 V DET2 LH,Inverting sweep down VNON Low-side threshold voltage 2 Vdel22 0.4 0.5 0.6 V DET2 H L,Inverting sweep up VNON DET1 max. output voltage Vdh1 4.8 5.0 V DET1 min. output voltage Vdl1 0 0.2 V DET2 max. output voltage Vdh2 4.8 5.0 V DET2 min. output voltage Vdl2 0 0.2 V (1) Oscillator Switching frequency Fsw12 0.8 1.0 1.2 MHz Frequency variation Fc12 10 % VCC = 3 V to 13 V (1) Soft start Source current Iscss 6 10 14 A Sink current Iskss 0.5 1 2 mA CTL1, 2 = 0 V (1) Timer latch Source current Isctl 6 10 14 A SCP = 1.0 V SCP threshold voltage Vthscp 1.25 V (1) DTC1 Input bias current Vdtc1 3 0.1 3 A High-side threshold voltage VdtcH1 1.5 V On Duty = 0% Low-side threshold voltage VdtcL1 1.0 V On Duty = 100% (1) DTC2 Input bias current Idtc2 3 0.1 3 A High-side threshold voltage IdtcH2 1.5 V On Duty = 100% Low-side threshold voltage IdtcL2 1.0 V On Duty = 0% (2) Charge pump driver ERR AMP3, 4 FB3 1.212 1.25 1.288 V Feedback voltage FB4 0 V Input bias current Ib34 3 0.1 3 ABuffer I/O voltage difference Vd34 0.2 0.5 V Io = 10 mA Output current capacity Io34 130 50 mA VFB = 0 V www.rohm.com 2/18 2009.07 - Rev.B 2009 ROHM Co., Ltd. All rights reserved.