YB1517 Datasheet, PDF (2/10 Pages) YOBON TECHNOLOGIES,INC. – Step-up DC-DC Converter & White LED Driver

Pin Configuration
YB1517
Step-up DC-DC Converter & White LED Driver
SW ₁
5 ^VIN
GND ₂
FB ₃
4 ^CTRL
SOT23-5
Figure 3: Pin Configuration
Pin Description
Table 1
Pin Name
Description
Switching Pin. This is the collector of the internal NPN power switch.
1
SW Connect to inductor and diode. Minimize the metal trace area
connected to this pin to reduce EMI.
2
GND Ground Pin. Connect directly to local ground plane.
Feedback Pin. Reference voltage is 220mV. When connecting LEDs
3
FB and a resistor at this pin, LED current is determined by the resistance
and CTRL voltage.
Shutdown Pin and Dimming Control Pin.
4
CTRL
VCTRL > 1.8V generates full-scale LED current.
VCTRL < 0.4V chip is off.
Switching from 0.4V to 2.0V, PWM duty cycle controls the LED current.
5
VIN
Input Supply Pin. Bypass this pin with a capacitor as close to the
device as possible.
Ordering Information
Table 2
Order Number Package Type
YB1517ST25
SOT23-5
Supplied As
3000 units Tape & Reel
Package Marking
Y58 F
YB1517 Rev.1.4
www.yobon.com.tw
2