White LED Step-Up Converter

China Resources Powtech (Shanghai) Limited

WWW.CRPOWTECH.COM

Page 2

PT4103_DS Rev EN_2.2

PT4103

PIN ASSIGNMENT

PIN DESCRIPTIONS

SOT

PIN No.

PIN

Names

DESCRIPTION

1

SW

Power Switch Output. Connect the inductor and the blocking Schottky diode to

SW.

2

GND

Ground

3

FB

Feedback input pin. The reference voltage at this pin is 104mV. Connect the

cathode of the lowest LED to FB and a current sense resistor between FB and

GND.

4

EN

Enable pin. A high input at EN enables the device and a low input disables the

devices. When not used, connect EN to the input source for automatic startup.

5

OV

Over Voltage Input. OV measures the output voltage for open circuit protection.

Connect OV to the output at the top of the LED string.

6

IN

Input Supply Pin. Must be locally bypassed.

ABSOLUTE MAXIMUM RATINGS (Note 1)

SYMBOL

ITEMS

VALUE

UNIT

VIN

Input Voltage

-0.3～6

V

VSW

Voltage at SW Pin

-0.5～35

V

VIO

All Other I/O Pins

GND-0.3 to VDD+0.3

V

PTR1

Thermal Resistance，SOT-23-6

θJA

θJC

220

110

℃

/W

Tstg

Storage Temperature

-55 to 150

℃

Tsolder

Package Lead Soldering Temperature

260 , 10s

℃