June 21-07 revH

SP7680: Complete Backlight Solution



2007 Sipex Corporation

Page 4

TIMING CHARACTERISTICS

Note 3: Power-up time from Shutdown

START

ADDRESS A

STATUS

A

CNTRL

A

MAIN

A

SUB

A

AUX

A

STOP

I

5%

Power-up time (Softstart time)

Drivers ON

1x mode

1.5x mode

1x mode

Note 4: Soft Start Interval (within 1x Mode)

START

ADDRESS A

STATUS

A

CNTRL

A

MAIN

A

SUB

A

AUX

A

STOP

I

Soft Start Interval within 1X mode

The softstart interval within 1x mode:

After mode changes from Standby to Active, the time from the rising edge of

5%

Output Current within

5% of final value

ILED

Note 5: Soft Start Interval (Transition 1x to 1.5x Mode)

START

ADDRESS A

STATUS

A

CNTRL

A

MAIN

A

SUB

A

AUX

A

STOP

I2C data input (Final state)

Soft Start Interval within 1.5X mode

The softstart interval from 1x to 1.5x mode: After mode changing from 1x mode to 1.5x mode, the time from the

the measurement to know the boosting time of the charge pump at full load current. In this case, it is easier to

5%

Mode of charge pump changes from

1x mode to 1.5x mode at the full load.

1x mode

1.5x mode