SP7680EB Exar Corporation, SP7680EB Datasheet - Page 4

• Manufacturer Part Number: SP7680EB
• Description: Display Modules & Development Tools Complete Backlight Solution
• Manufacturer: Exar Corporation

Specifications of SP7680EB

• Product: Display Modules

Note 3: Power-up time from Shutdown
Note 4: Soft Start Interval (within 1x Mode)
Note 5: Soft Start Interval (Transition 1x to 1.5x Mode)
Sept 13-07 revI
The softstart interval within 1x mode: After mode changes from Standby to Active, the time from the rising edge of
“STATUS” acknowledge bit to the point where the I
tested with V
The softstart interval from 1x to 1.5x mode: After mode changing from 1x mode to 1.5x mode, the time from the
rising edge of “CNTRL” acknowledge bit to the point where V
the measurement to know the boosting time of the charge pump at full load current. In this case, it is easier to
measure V
I
START
I
START
I2C data input (Final state)
START
2
2
C data input
C data input (Final state)
V
I
OUT
OUT
ILED
ADDRESS A
ADDRESS A
ADDRESS A
OUT
IN
= 4.0V to ensure 1x mode.
than I
OUT
V
. Softstart is tested with V
OUT
STATUS
STATUS
STATUS
SP7680: Complete Backlight Solution
5%
1x mode
A
A
A
Soft Start Interval within 1.5X mode
Soft Start Interval within 1X mode
CNTRL
CNTRL
CNTRL
1x mode
Power-up time (Softstart time)
Output Current within
5% of final value
Page 4
IN
5%
= 3.4V to force a mode transition.
LED
A
A
A
is within 5% of its final value at full load. This softstart is
MAIN
MAIN
MAIN
1.5x mode
Mode of charge pump changes from
1x mode to 1.5x mode at the full load.
OUT
1.5x mode
is within 5% of its final value at full load. This is
A
A
A
5%
SUB
SUB
SUB
Drivers ON
1x mode
A
A
A
TIMING CHARACTERISTICS
AUX
AUX
AUX
© 2007 Sipex Corporation
A
A
A
STOP
STOP
STOP