yb1508p YOBON TECHNOLOGIES,INC., yb1508p Datasheet
yb1508p
Available stocks
Related parts for yb1508p
yb1508p Summary of contents
Page 1
Description The YB1508 is a step-up DC-DC converter, acting as current source to drive white LEDs in series. Series connecting of the LEDs provides identical LED currents ...
Page 2
... VIN possible. Ordering Information Table 2: Order Number Package Type High Ovp YB1508 Low Ovp YB1508P YB1508 MRev1.4 Step-up DC-DC Converter , White LED Driver Figure 2：YB1508 SOT23-5 Description VCTRL < 0.4V chip is off Switching from 0.4V to 2.0V, PWM duty cycle controls the LED current Supplied as SOT23-5 3000 units Tape & Reel SOT23-5 3000 units Tape & ...
Page 3
... Lead Temperature sec) Thermal Resistance Conditions Iout =20mA, Vout = 12.5V Circuit of figure 1. (L=22uH Cout =4.7uF) Rfb = 10 ohms Vfb = 0.3V CTRL = 0V At Isw = 200mA 40% duty cycle Ctrl = 0.3V Ctrl = 2V YB1508 YB1508P WWW.YOBON.COM.TW YB1508 150 °C (Soldering 10 300 °C 195 °C Min Typ Max Units 2.7 9 180 200 ...
Page 4
Functional Block Diagram Application Information Operation understood by referring to the block ...
Page 5
Inrush Current The maximum switch current is limited to about 300 mA by the chip. Typically, this large current will occur for about 40us during start up. A larger Cout will increase the duration of high current. when Vin is ...
Page 6
Figure 6. Li-Ion to Two White LEDs Application Circuit Figure 7. Li-Ion to Three White LEDs Application Circuit Figure 8. Four White LEDs Application Circuit YB1508 MRev1.4 Step-up DC-DC Converter , White LED Driver WWW.YOBON.COM.TW YB1508 6 ...
Page 7
SOT-25 Package Information All the contents in this datasheet are not assuming any responsibility for use of any circuitry described, no circuit patent license are implied and Yobon reserves the right at any time without notice to change said circuitry ...