SC624 Ver la hoja de datos (PDF) - Semtech Corporation

Número de pieza

componentes Descripción

Fabricante

SC624

LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWire™ Interface

Semtech Corporation 

SC624

Pin Descriptions

Pin #

1

2

3

4

5

6

7

8

9

10

Pin Name

C2-

PGND

NC

BL1

BL2

BL3

BL4

AGND

GREF

NC

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 1μF capacitor connected to C2+

Ground pin for high current charge pump

Unused pin — do not terminate

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

Unused pin — do not terminate

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 2.2μF 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 1μF capacitor to PGND

Negative connection to bucket capacitor 1 — requires a 1μF capacitor connected to C1+

Thermal pad for heatsinking purposes — connect to ground plane using multiple

vias — not connected internally

10

Share Link: