ROHM BD8157EFV Data Handbook/Specifications Sheet
Summary
Discover this integrated Power Supply IC series, featuring a sophisticated single-chip design that combines source voltage step-up regulation with a gamma correction buffer amplifier for TFT-LCD panels. Manual specifications detail its excellent low-voltage performance and high efficiency (>85%), supporting input voltages from 2.1 V to 5.5 V. Designed for minimal power usage, this module is essential for applications like laptop LCDs, satellite navigation systems, and general monitor displays, ensuring reliable and comprehensive power management in modern electronics.
Page 1 Text Content
Power Supply IC Series for TFT-LCD Panels
ingle S -channel Source Voltage Output Power Supply + Gamma Buffer Amp ICs BD8151EFV,BD8157EFV No.09035EBT11 ●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 k Hz/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* m W
BD8151EFV −40 to +85
Operating temperature range Topr
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 m W/℃ 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℃)
Limit
Parameter Symbol 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
1/17 www.rohm.com 2009.07 - Rev.B
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Page Summary Contents For ROHM BD8157EFV Data Handbook/Specifications Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 18 |
| File Size | 505.04 KB |
| Published | July 07, 2026 |
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Frequently Asked Questions
What input voltages are supported by the BD8151EFV and BD8157EFV ICs?
The BD8151EFV supports 2.5 V to 5.5 V, while the BD8157EFV supports 2.1 V to 4.0 V.
What is a key benefit of using these single-chip power supply ICs?
They incorporate both the source voltage step-up regulator and gamma correction buffer on one chip, offering cost savings.
Do these ICs have protective features built in?
Yes, they include under-voltage lockout, overcurrent protection, and thermal shutdown circuits.
What is the maximum operating temperature range for both IC models?
The BD8151EFV has an operating range of -40 to +85℃, and the BD8157EFV ranges from -40 to +125℃.