June 21-07 revH

SP7680: Complete Backlight Solution



2007 Sipex 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

Storage Temperature..………..…………………….-65°C to 150°C

Junction Temperature

JA

(1 square 1oz Cu)……………...…….………….33.3°C/W

ELECTRICAL SPECIFICATIONS

-40°C to +85°C, Tj=-40°C to +125°C. Bold values apply over the full operating temperature range.

PARAMETER

MIN

TYP

MAX

UNITS

CONDITIONS

Operating Input Voltage Range

2.7

5.5

V

Operating Input Current

(4 MAIN LEDs operating at 33uA

each, all other LEDs off, in 1X

mode)

300

400

µA

Status = 11000000

CNTRL = 00011110

Main=Sub=Aux=00000000

Operating Input Current

(Charge pump in 1.5X mode with

all LEDs at 33uA each)

5

8

mA

Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=00000001

Standby mode Quiescent Current

200

300

µA

Status = 10000000

CNTRL = 00000000

Main=Sub=Aux=00000000

Maximum Output Current (Note 1)

200

mA

LED Current accuracy

-10

10

%

= 20mA

LED Current matching

-3

+3

%

= 20mA

Current DAC Resolution

6

bits

Current for DAC=000000

0

mA

Current for DAC=000001

5

31

50

µA

1x mode only

Current DAC LSB DAC=00010

1

mA

MAIN and SUB LEDs

Current DAC LSB DAC=00010

2

mA

AUX LED

LED Dropout Voltage (Note 2)

0.2

V

=20mA for MAIN and SUB;

=40mA for AUX

Maximum LED Current

31.5

mA

After 63 counts MAIN and SUB

LEDs

Maximum LED Current

63

mA

After 63 counts AUX LED

Switching Frequency

1.6

2

2.4

MHz

Equivalent Resistance, 1x mode

3

5

Equivalent Resistance, 1.5x mode

6

10

Control Clock Frequency

0.4

MHz