SC658ULTRT Semtech, SC658ULTRT Datasheet - Page 8

• Manufacturer Part Number: SC658ULTRT
• Description: Backlight Driver For 4 LEDs With SemPulseTM Interface
• Manufacturer: Semtech

Pin Descriptions
Pin #
0

2
3
4

2
3
4
5
6
7
8
9
Pin Name
GND
OUT
SPIF
C+
C2+
BL3
BL4
BL
BL2
C2-
C-
NC
NC
IN
Pin Function
Current sink output for main backlight LED 3
Current sink output for main backlight LED 4
No connection
No connection
SemPulse single wire interface pin — used to enable/disable the device and to configure all regis-
ters (refer to Register Map and SemPulse Interface sections)
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 should be connected to this pin
Battery voltage input
Current sink output for main backlight LED 
Current sink output for main backlight LED 2
—
—
—
—
leave this pin open if unused
leave this pin open if unused
leave this pin open if unused
leave this pin open if unused
SC658
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