SC621 Ver la hoja de datos (PDF) - Semtech Corporation
Número de pieza
componentes Descripción
Fabricante
SC621 Datasheet PDF : 23 Pages
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SC621
Pin Descriptions
Pin #
Pin Name
1
C2-
2
PGND
3
FL
4
BL1
5
BL2
6
BL3
7
BL4
8
AGND
9
GREF
10
FLEN
11
SWIF
12
NC
13
BYP
14
LDO2
15
LDO1
16
VOUT
17
C2+
18
C1+
19
VIN
20
C1-
T
THERMAL PAD
Pin Function
Negative connection to bucket capacitor 2 — requires a 2.2μF 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
Ground reference — connect to ground
Control pin for flash LED(s) — high = ON, low = OFF
SemWire single wire interface pin — used to enable/disable the device and to set up all internal
registers (refer to Register Map and SemWire Interface sections)
Unused pin — do not terminate
Bypass pin for voltage reference — connect with a 22nF capacitor to AGND
Output of LDO2 — connect with a 1μF capacitor to AGND
Output of LDO1 — connect with a 1μF capacitor to AGND
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 2.2μF capacitor connected to C2-
Positive connection to bucket capacitor 1 — requires a 2.2μF capacitor connected to C1-
Battery voltage input — connect with a 2.2μF capacitor to PGND
Negative connection to bucket capacitor 1 — requires a 2.2μF capacitor connected to C1+
Thermal pad for heatsinking purposes — connect to ground plane using multiple vias — not
connected internally
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