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YB1517ST25 Datasheet(PDF) 2 Page - YOBON TECHNOLOGIES,INC. |
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YB1517ST25 Datasheet(HTML) 2 Page - YOBON TECHNOLOGIES,INC. |
2 / 10 page YB1517 Step-up DC-DC Converter & White LED Driver YB1517 Rev.1.4 www.yobon.com.tw 2 SW GND CTRL VIN SOT23-5 5 4 1 2 3 FB Pin Configuration Figure 3: Pin Configuration Pin Description Table 1 Pin Name Description 1 SW Switching Pin. This is the collector of the internal NPN power switch. 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. 3 FB Feedback Pin. Reference voltage is 220mV. When connecting LEDs and a resistor at this pin, LED current is determined by the resistance and CTRL voltage. 4 CTRL Shutdown Pin and Dimming Control Pin. 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 Supplied As Package Marking YB1517ST25 SOT23-5 3000 units Tape & Reel Y58 F |
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