yb1517 YOBON TECHNOLOGIES,INC., yb1517 Datasheet
yb1517
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yb1517 Summary of contents
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... One of the major applications for YB1517 is in the converter and OLED power supply and TFT panel power supply. When using YB1517 for white LED driving not recommended to control LED brightness by applying a PWM signal to the CTRL pin, because the built-in soft-start circuit might interfere the start-up operation of YB1517 and cause lower brightness ...
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... Switching from 0.4V to 2.0V, PWM duty cycle controls the LED current. Input Supply Pin. Bypass this pin with a capacitor as close to the 5 VIN device as possible. Ordering Information Table 2 Order Number Package Type YB1517ST25 SOT23-5 YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver SOT23-5 Figure 3: Pin Configuration Description Supplied As 3000 units Tape & ...
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... Exceeding these ratings may damage the device. 2. The device is not guaranteed to function outside of its operating conditions. 3. θ is measured in free air YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver Recommended Operating Conditions (Note 1) Operating Temperature.........-40°C to 85°C Supply Voltage......................... 2.7V to 16V SW Voltage...........................................20V (note) ....... 150° ...
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... Over Thermal Protection Note : Absolute maximum ratings are limits beyond which damage to the device may occur. The maximum allowable, power dissipation at any ambient temperature is calculated using: P YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver = 1μ 4.7μF, T =25°C, unless otherwise noted.) ...
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... Typical Performance Characteristics YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver www.yobon.com.tw YB1517 5 ...
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... YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver www.yobon.com.tw YB1517 6 ...
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... YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver www.yobon.com.tw YB1517 7 ...
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... YB1517. The maximum switch current is limited to about 900mA by the chip. Over Voltage Protection The YB1517 has an internal over voltage protection circuit which also acts as an open-circuit protection. In the cases of open circuit or the LEDs failure, the LEDs are disconnected from the circuit, and the feedback voltage will be zero ...
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... The input bypass capacitor C in Figure 1, must be placed close to the IC. YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver This will reduce copper trace resistance which affects input voltage ripple of the IC. ...
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... Package Information (SOT23-5) NOTICE: The information described herein is subject to change without notice. Yobon does not assume any responsibility for use of any circuitry or applications described herein, nor does it convey any patent license. YB1517 Rev.1.4 Step-up DC-DC Converter & White LED Driver milimeters Inches MIN. ...