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BD8157EFV Datasheet(PDF) 1 Page - Rohm |
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BD8157EFV Datasheet(HTML) 1 Page - Rohm |
1 / 18 page 1/17 www.rohm.com 2009.07 - Rev.B © 2009 ROHM Co., Ltd. All rights reserved. Power Supply IC Series for TFT-LCD Panels ingle S -channel Source Voltage Output Power Supply + Gamma BufferAmp ICs BD8151EFV,BD8157EFV ● Description The BD8151EFV,BD8157EFV power supply IC are designed for use with TFT-LCD panels. It incorporates a built-in source voltage step-up switching regulator and gamma correction buffer amp. The combination of a source power supply and gamma correction buffer on a single chip delivers significant cost savings. Compatible with input voltages from 2.5 V to 5.5 V (BD8151EFV), 2.1 V to 4.0 V (BD8157EFV), the IC supports low-voltage operation and reaches over 85% efficiency with a 2.5 V input, contributing to low power consumption designs. ● Features 1) Single-chip implementation of a source power supply and gamma correction buffer 2) Support for low-voltage operation, with input voltages from 2.5 V to 5.5 V (BD8151EFV) 2.1 V to 4.0 V (BD8157EFV) 3) Built-in 1.4 A, 0.2 low-voltage FET 4) Switchable step-up DC/DC switching frequencies: 600 kHz/1.2 MHz 5) Current mode PWM control 6) Under-voltage lockout protection circuit 7) Built-in overcurrent protection circuit 8) Built-in thermal shutdown circuit ● Applications Satellite navigation systems, laptop PC TFT LCD panels LCD monitor panels ● Absolute maximum ratings (Ta = 25℃) Parameter Symbol Limit Unit Power supply voltage Vcc 7 V Power dissipation Pd 1000* mW Operating temperature range BD8151EFV Topr −40 to +85 ℃ BD8157EFV −40 to +125 Storage temperature range Tstg −55 to +150 ℃ Switching pin current Isw 1.5** A Switching pin voltage Vsw 15 V VS voltage VS 15 V Maximum junction temperature Tjmax 150 °C * Reduced by 8 mW/℃ over 25℃, when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm). ** Must not exceed Pd. ● Recommended Operating Ranges (Ta = 25℃) Parameter Symbol Limit Unit Min. Typ. Max. Power supply voltage BD8151EFV Vcc 2.5 3.3 5.5 V Power supply voltage BD8157EFV Vcc 2.1 2.5 4.0 V Switching current ISW — — 1.4 A Switching pin voltage VSW — — 14 V VS pin voltage VS 5 9 14 V No.09035EBT11 |
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