AAT2825 参数 Datasheet PDF下载

DATA SHEET

AAT2822/2823/2824/2825

TFT-LCD DC/DC Converter with WLED Driver and VCOM Buffer

Electrical Characteristics

V

IN

= 5V, EN = WEN = WDIM = V

IN

, V

AVDD

= V

DD

= 12V, T

A

= -40°C to 85°C unless otherwise noted. Typical values are

at T

A

= 25°C.

Symbol

Description

Conditions

Min

2.5

Rising Edge

V

FB

= V

FBP

= 0.7V, V

FBN

= -0.1, LX not switching

EN = WEN = Low, I

SHDN

= I

IN

+ I

DD

, V

DD

= 5V

No load

0 < I

LOAD

< 50µA

In regulation

Temperature rising

Hysteresis

2.4

50

1.1

1.182

50

+140

15

V

IN

-

V

DIODE

910

86

No Load

V

FB

falling

0 < I

AVDD

< full load

V

IN

= 2.5V to 5.5V

V

FB

= 0.7V

I

LX

= 200mA

V

LX

= 13.2V

V

FB

= 0.7V, duty cycle = 75%

0.588

0.535

14.5

1300

90

0.6

0.546

0.01

0.1

350

0.01

1

1.3

2.7

0.588

470

-1

F

OSC

0.6

13.2

0.612

530

+1

6

3

1690

0.612

0.557

±0.4

+1

700

20

1.20

Typ

Max

5.5

2.5

1.6

1

1.218

10

Units

V

V

mV

mA

µA

V

mV

µA

O

Power Supply

V

IN

Input Voltage Range

V

UVLO

Under-Voltage Lockout Threshold

UVLO

HYS

UVLO Hysteresis

I

IN

IN Quiescent Current

I

SHDN

Shutdown Current

REF Output Voltage

V

REF

REF Load Regulation

REF Current

T

SD

Thermal Shutdown

C

Main Step-Up Regulator

V

AVDD

F

OSC

DC

MAX

V

FB

Output Voltage Range

Operating Frequency

Maximum Duty Cycle

FB Regulation Voltage

V

kHz

%

V

V

%/mA

%/V

µA

mΩ

µA

A

ms

V

kHz

V

mV

μA

Ω

Ω

kΩ

V

Hz

mV

mV

μA

Ω

Ω

kΩ

FB Fault Trip Level

FB Load Regulation

FB Line Regulation

FB Input Bias Current

R

LX(ON)

LX On-Resistance

I

LX

LX Leakage Current

I

LIM

LX Current Limit

t

SS

Soft-Start Period

Gate High Charge Pump (VGH)

V

DD

V

DD

Input Supply Range

Operating Frequency

V

FBP

FBP Regulation Voltage

FBP Fault Trip Level

I

FBP

FBP Input Bias Current

DRVPP

RDS

DRVP PCH ON-Resistance

DRVPN

RDS

DRVP NCH On-Resistance

-1

V

FBP

Falling

V

FBP

= 0.7V

V

FBP

= 0.585V

V

FBP

= 0.615V

3

1.5

20

2.7

-50

408

-1

F

OSC

0

425

3

1.5

20

Gate Low Charge Pump (VGL)

V

DD

V

DD

Input Supply Range

Operating Frequency

V

FBN

FBN Regulation Voltage

FBN Fault Trip Level

I

FBN

FBN Input Bias Current

DRVNP

RDS

DRVN PCH ON-Resistance

DRVNN

RDS

DRVN NCH On-Resistance

13.2

+50

442

+1

6

3

V

FBN

Rising

V

FBN

= -0.1V

V

FBN

= 0.035V

V

FBN

= -0.025V

6

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202081B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • August 2, 2012