sc656 Semtech Corporation, sc656 Datasheet - Page 10

• Manufacturer Part Number: sc656
• Description: Backlight Driver For 7 Leds With Charge Pump And Pwm Control
• Manufacturer: Semtech Corporation

Pin Descriptions
Pin #
0

2
3
4
5
6
7
8
9
20

2
3
4
5
6
7
8
9
Pin Name
BANK 
BANK 2
ISETM
ISETS
GND
ENM
OUT
ENS
C+
C2+
BL
BL2
BL3
BL4
BL5
BL6
BL7
C2-
C-
IN
Pin Function
Enable pin for sub display LED bank — also used as the PWM dimming control input for this bank
Battery voltage input
Current setting pin — connect a resistor between ISETM and IN to set the main bank LED
current.
Current setting pin — connect a resistor between ISETS and IN to set the sub bank LED
current.
Current sink output for backlight LED  — leave this pin open if unused
Current sink output for backlight LED 2 — leave this pin open if unused
Current sink output for main backlight LED 3 — leave this pin open if unused
Current sink output for main backlight LED 4 — leave this pin open if unused
Current sink output for main backlight LED 5 — leave this pin open if unused
Current sink output for main backlight LED 6 — leave this pin open if unused
Current sink output for main backlight LED 7 — leave this pin open if unused
Logic input that, along with BANK 2, controls the configuration of the main and sub bank functions. See
application information section for details.
Logic input that, along with BANK , controls the configuration of the main and sub bank functions. See
application information section for details.
Ground pin
Negative connection to bucket capacitor 2
Negative connection to bucket capacitor 
Positive connection to bucket capacitor 
Positive connection to bucket capacitor 2
Charge pump output — all LED anode pins are connected to this pin.
Enable pin for the main display LED bank — also used as the PWM dimming control input for this bank
SC656
0