SC623A View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
SC623A
Semtech Corporation
'SC623A' PDF : 21 Pages View PDF
SC623A
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
Pin Name
C2-
PGND
FL
BL1
BL2
BL3
BL4
AGND
SCL
FLEN
11
SDA
12
EN
13
NC
14
NC
15
NC
16
VOUT
17
C2+
18
C1+
19
VIN
20
C1-
T
THERMAL PAD
Pin Function
Negative connection to bucket capacitor 2 — requires a 1μF capacitor connected to C2+
Ground pin for high current charge pump and Flash LED driver
Current sink output for flash LED(s)
Current sink output for main backlight LED 1 — leave this pin open if unused
Current sink output for main 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
Analog ground pin — connect to ground and separate from PGND current
I2C clock input pin
Control pin for flash LED(s) — high = ON, low = OFF
I2C bi-directional data pin — used for read and write operations for all internal registers (refer to
Register Map and I2C Interface sections)
Chip enable — active high — low state resets all registers (see register map table)
Unused pin — do not terminate
Unused pin — do not terminate
Unused pin — do not terminate
Charge pump output — all LED anode pins should be connected to this pin — requires a 4.7μF
capacitor to PGND
Positive connection to bucket capacitor 2 — requires a 1μF capacitor connected to C2-
Positive connection to bucket capacitor 1 — requires a 1μF capacitor connected to C1-
Battery voltage input — connect with a 2.2μF capacitor to PGND
Negative connection to bucket capacitor 1 — requires a1μF capacitor connected to C1+
Thermal pad for heatsinking purposes — connect to ground plane using multiple
vias — not connected internally
9
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