SP7680EB datasheet(3/16 Pages) SIPEX

3 / 16 page

June 21-07 revH

SP7680: Complete Backlight Solution



2007 Sipex Corporation

Page 3

ELECTRICAL SPECIFICATIONS continued

PARAMETER

MIN

TYP

MAX

UNITS

CONDITIONS

Power-up time from Shutdown

(Note 3)

1.5

VIN = 4.2V, VLED=3.3V

Initial State: Status = 00000000

Final State: Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=00000000

Time measured from stop bit of

final state I

2C command to point

where VOUT = 4.1V

Soft Start Interval

(within 1X mode)

(Note 4)

µs

VIN = 4.0V, VLED=3.3V

Initial State: Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=00000000

Final State:

Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=11111100

Time measured from the raising

edge of STATUS acknowledge bit

of final state command to the point

where all current is within 5% of its

final value.

Soft Start Interval

(transition 1X to 1.5X)

(Note 5)

140

µs

VIN = 3.4V, VLED = 3.3V

Initial State: Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=00000000

Final State: Status = 11000000

CNTRL = 11111110

Main=Sub=Aux=11111100

Time measured from the raising

edge of CNTRL acknowledge bit of

final state command to the point

where output voltage is within 5%

of its final value.

Shutdown Supply Current @ 25 °C

0.01

If both SDA and SCL are low for

50ms, the part goes into shutdown

mode, set

STATUS=00000000,

VSUPPLY = 4.2V

Shutdown Supply Current @ 85 °C

If both SDA and SCL are low for

50ms, part goes into shutdown

mode set

STATUS=00000000,

VSUPPLY = 4.2V

Short LED threshold

VOUT

– 0.5V

VOUT –

Thermal Shutdown Die Temperature

170

Regulator turns off

Thermal Shutdown Hysteresis

Regulator turns on again @ 150°C

SDA, SCL low timeout

If both SDA and SCL are low for

50ms, part goes into shutdown

mode set STATUS=00000000

SDA, SCL input logic low voltage

0.4

Regulator shutdown

SDL, SCA input logic high voltage

1.6

Regulator enabled

Note 1:

The maximum output current is a derived spec IOUTMAX =

(VIN*1.5 – VLED - VDROPOUT)/(max Req 1.5X mode).

Note 2:

Dropout is defined when LED current goes 10% below nominal value as VIN is lowered.

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