BD8151EFV_09 Datasheet, PDF (1/18 Pages) Rohm – Single-channel Source Voltage Output Power Supply + Gamma Buffer Amp ICs

Power Supply IC Series for TFT-LCD Panels
Single-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 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
BD8157EFV
Topr
−40 to +85
−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
Power supply voltage BD8151EFV
Power supply voltage BD8157EFV
Switching current
Switching pin voltage
VS pin voltage
Symbol
Min.
Vcc
2.5
Vcc
2.1
ISW
—
VSW
—
VS
5
Limit
Typ.
3.3
2.5
—
—
9
Max.
Unit
5.5
V
4.0
V
1.4
A
14
V
14
V
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2009.07 - Rev.B