SGM3735 Datasheet, PDF (3/13 Pages) SG Micro Corp – 38V Step-Up LED Driver

SGM3735
PIN CONFIGURATION (TOP VIEW)
SGM3735
38V Step-Up LED Driver
PGND 1
VIN 2
EN/SET 3
GND 4
8 SW
7 VOUT
6 FB
5 RSET
TDFN-2×2-8L
PIN DESCRIPTION
PIN
1
2
3
4
5
6
7
8
Exposed
Pad
NAME
PGND
VIN
EN/SET
GND
RSET
FB
VOUT
SW
FUNCTION
Power Ground.
Supply Input.
Enable Control and Single Wire Dimming Interface. Drive to a logic high to enable the
device. Use pulse to dim LED brightness. Keep EN/SET pin in "Low" status for 3ms to shut
down chip.
Ground.
RSET Pin. Connect one resistor from RSET to GND to program the maximum white LED
current.
Feedback Input. Connect this pin to the cathode of the white LED.
Output and Over-Voltage Protection Pin.
Switch Output. Connect this pin to the inductor and the Schottky diode.
GND Exposed pad should be soldered to PCB board and connected to GND.
TYPICAL APPLICATION
Input Range
2.7V~5.5V
C_IN
1kΩ
Brightness control
L
D1
2
8
VIN
SW
VOUT ⁷
3
SGM3735
EN/SET
FB
6
GND PGND RSET ⁵
4
1
R_SET
Up to 38V Output
C_OUT
White LEDs
Up to 10 in series
Or up to 10S4P
3
SG Micro Corp
www.sg-micro.com