YB1521 Datasheet, PDF (2/9 Pages) YOBON TECHNOLOGIES,INC. – High Power Step-Up DC-DC Converter & WLED Driver

YB1521
High Power Step-Up DC-DC Converter & WLED Driver
Pin Configuration
Figure 3: Pin Configuration
Pin Assignment & Description
Table1
Pin
1
2
3
4
5
NAME
SW
GND
FB
EN
IN
Description
Switching Pin. This is the drain of internal power MOSFET
switch. Connect the power inductor and output rectifier to SW.
Ground pin. Connect directly to local ground plane.
Feedback Pin. Reference voltage is 200mV. Connect LEDs and
a resistor at this pin. LED current is determined by the
resistance and FB voltage.
Shutdown Pin and Dimming Control Pin. PWM duty cycle
controls the LED current.
Input Supply Pin. Bypass this pin with a capacitor as close to
the device as possible.
Ordering Information
Table2
Order Number Package Type
Supplied As
YB1521ST25
SOT23-5 3000 Units Tape & Reel
Package Marking
Y521
YB1521 MRev.1.1
www.yobon.com.tw
2