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2009.07 - Rev.B

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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