SGM3145 Datasheet, PDF (3/12 Pages) SG Micro Corp – 8-Channel PWM Dimming Charge Pump White LED Driver

SGM3145
PIN CONFIGURATION (TOP VIEW)
8-Channel PWM Dimming
Charge Pump White LED Driver
20
19
18
17
16
LED8 1
15 _C2N
LED7 2
14 _C1N
LED6 3
GND
13 _C1P
LED5 4
12 _C2P
LED4 5
11 _N.C.
6
7
8
9
10
TQFN-3×3-20L
PIN DESCRIPTION
PIN
NAME
I/O
FUNCTION
1, 2, 3, 4,
5, 6, 7, 8
LED8－LED1
I
Current Sink Input. Connect the cathode of the white LEDs to these inputs.
9
PGND
- Power Ground.
10
VOUT
O
Output Voltage Source. Connect the output capacitor and the anode of the
LEDs to this pin.
11, 20
N.C.
- No Internal Connection.
12
C2P
- Positive Terminal of Bucket Capacitor 2.
13
C1P
- Positive Terminal of Bucket Capacitor 1.
14
C1N
- Negative Terminal of Bucket Capacitor 1.
15
C2N
- Negative Terminal of Bucket Capacitor 2.
16
VIN
I Supply Voltage Input.
17
18
19
Exposed
Pad
AGND
PWM
EN
GND
- Analog Ground.
I
PWM Dimming Pulse. Duty cycle = 0%, I_OUT = 0mA; duty cycle =100%, I_OUT =
27mA.
Enable or Disable SGM3145. Logic high to enable chip, logic low to disable
I chip. For normal operation, suggest connecting to VIN only after the VIN has
settled if the VIN ramping up is slow.
- Exposed pad should be soldered to PCB board and connected to GND.
SG Micro Corp
3
www.sg-micro.com