Sept 27-07 rev G

SP7682: Backlight and Flash Driver

© 2007 Exar Corporation

Page 2

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the

device at these ratings or any other above those indicated in the

operation sections of the specifications below is not implied.

Exposure to absolute maximum rating conditions for extended

periods of time may affect reliability.

Power Dissipation………………………….Internally limited

1

Storage Temperature..……..………………-65

°C to 150 °C

Junction Temperature................................-40

°C to +125°C

ESD @ LED pins……………...…………………+/-4kV HBM

ESD all other pins………….…………………....+/-2kV HBM

ELECTRICAL SPECIFICATIONS

Bold

values apply over the full operating temperature range (-40

°C to 85°C).

PARAMETER

MIN

TYP

MAX

UNITS

CONDITIONS

Operating VIN Range

2.7

5.5

V

Operating Input Current

2

mA

Quiescent Current

25

μA

Standby Mode

Shutdown Supply Current

0.01

1

μA

ILED Voltage for DAC=000000

0

mA

Measure LED1-LED4 and FLASH pins

0.5

mA

Measure current into LED1-LED4

30.2

31.5

34.8

mA

Measure current into LED1-LED4

10

mA

Measure current into FLASH

465

500

535

mA

Measure current into FLASH

Current DAC Resolution

6

Bit

Backlight Current DAC LSB

0.5

mA

Flash Current DAC LSB

10

mA

DAC Current Accuracy

-7

7

%

Switching Frequency

1.9

2.4

2.9

MHz

Equivalent Resistance, 1x mode

1.0

1.8

Ohm

Iout=200mA

Equivalent Resistance, 1.5x mode

10

Ohm

Iout=80mA

Equivalent Resistance, 2x mode

8

Ohm

Iout=500mA

LEDx Pin dropout voltage

0.25

V

FLASH Pin dropout voltage

0.25

V

Thermal Regulation

0.01

%/

°C

Thermal Shutdown Die Temperature

150

160

170

°C

Driver turns off

Thermal Shutdown Hysteresis

20

°C

Driver turns on again

Over-current Protection

0.7

1.2

A

Vout =0V

Over-voltage protection

5.4

6.0

V

Vout open

100

μs

To 1x mode from STANDBY mode

SDA, SCL, SETB, SETFL input logic low

voltage

0.4

V

SDA, SCL, SETB, SETFL input logic

high voltage

1.6

V

50

μs

EN pin high to low

Time Duration before standby, SP7682

2

4

6

s

bits TOUT0, TOUT1)

Time Duration before standby, SP7682A

1

2

3

s

Enable logic low voltage

0.4

V

Driver shutdown

Enable logic high voltage

1.6

V

Driver enabled