SP7682 EXAR [Exar Corporation], SP7682 Datasheet - Page 4

• Manufacturer Part Number: SP7682
• Description: Backlight and Flash Driver in QFN 3mm x 3mm
• Manufacturer: EXAR [Exar Corporation]

Sept 27-07 rev G
13,14,
PIN #
7,8,9,
15,16
4, 5
10
11
12
1
2
3
4
5
6
-
(SP7682A)
(SP7682A)
SCL,SDA
(SP7682)
C2+, C2-,
C1+, C1-
Thermal
FLASH
SETFL
SETBL
NAME
PGND
LED1-
SGND
VOUT
LED4
Pad
PIN
V
EN
IN
Power supply input. Place a 4.7uF decoupling capacitor next to this pin.
Power ground pin.
Enable/Shutdown (Logic high = enable, logic low = shutdown). Used to immediately
disable the driver and reset the output current level.
These pins connect to the I
interface.
Used to serially program the Flash LED current
Used to serially program the Backlight LED’s output current
High current internal current source. Connect a high brightness LED between this pin and
V
and 500mA with 10mA increments. During operation this pin is monitored for dropout.
When dropout condition detected the charge pump increases operation mode from 1x to
1.5x to 2x. If the FLASH current is set to above the maximum threshold the time-out
protection circuit is activated. After the maximum time of constant operation, FLASH
current is reduced to zero.
Internal current source for LCD backlight. Connect an LED between each of these pins
and V
0mA and 32mA with 0.5mA increments. During operation this pin is monitored for dropout.
When dropout condition detected the charge pump increases operation mode from 1x to
1.5x to 2x. If any of the LEDs are not used connect the corresponding pin to Vout.
Signal ground pin.
Output voltage of the internal charge pump. Connect the LEDs between this pin and the
corresponding internal current source. Connect a 2.2uF capacitor between VOUT and
PGND.
Connect external flying capacitors between these pins.
Connect thermal pad to PGND pin.
OUT
. The value of the current can be programmed via the I
OUT
. The value of the current can be programmed via the I
SP7682: Backlight and Flash Driver
Page 4
2
C bus. Multiple functions can be programmed through his
DESCRIPTION
2
C interface between 0mA
© 2007 Exar Corporation
2
C interface between
PIN DESCRIPTION