YB1518ST25 YOBON [YOBON TECHNOLOGIES,INC.], YB1518ST25 Datasheet
YB1518ST25
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YB1518ST25 Summary of contents
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Description The YB1518 is a step-up DC-DC converter; operates as current source to drive white LEDs(VIN at 3.0V LEDs(VIN at 3.4V LEDs(VIN at 3.4V) in series. Series connecting of the LEDs provides identical ...
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... CTRL 4 VIN 5 Ordering Information Table 2 Order Number YB1518ST25 YB1518 MRev.1.2 Step-up DC-DC Converter White LED Driver Figure 2: YB1518 Pin Configuration Description 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. ...
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Absolute Maximum Ratings VIN .........................................................................20V SW Voltage ............................................................36V FB Voltage ...............................................................5V CTRL Voltage...........................................................5V Maximum Junction Temp,TJ .............................150°C Lead Temperature (Slokering 10 sec) ................300°C Thermal Resistance............................................195°C Electricity Characteristics (TA=25°C, Vin=3.3V, Cin=1uF Cout=10uF unless otherwise noted) Table 3 Symbol Function Parameter Vin ...
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Typical Performance Characteristics Condition : VIN 2.8V ; 4.4V / VOUT ; 2pcs white LEDs Efficiency vs Vin (2WLEDs 2.7 3.0 3.3 3.6 Vin(V) YB1518 MRev.1.2 Step-up DC-DC Converter White LED Driver VCRTL : 3V ...
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Condition : Vin 2.8V ; 4.4V / Vctrl : 3V VOUT ; 4pcs white LEDs Efficiency vs Vin (4WLEDs 2.7 3.0 3.3 3.6 Vin(V) YB1518 MRev.1.2 Step-up DC-DC Converter White LED Driver Condition : Vin ...
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Condition : Vin 2.8V ; 4.4V / Vctrl : 3V VOUT ; 6pcs white LEDs Efficiency vs Vin (6WLEDs 2.7 3.0 3.3 3.6 Vin(V) YB1518 MRev.1.2 Step-up DC-DC Converter White LED Driver Condition : ...
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Condition : Vin 3.0V ; 4.4V / Vctrl : 3V VOUT ; 8pcs white LEDs Efficiency vs Vin (8WLEDs 2.7 3.0 3.3 3.6 Vin(V) YB1518 MRev.1.2 Step-up DC-DC Converter White LED Driver Condition : ...
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Typical Performance Characteristics Supply Current (Vctrl = 0V) 1 0.8 0.6 uA 0.4 0 Switching Frequency 932.2 932 931.8 931.6 Khz 931.4 931.2 931 930 Vin(V) Switch Leakage Current 0.5 ...
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Functional Block Operation The YB1518 uses a constant frequency, current mode control scheme to regulate the output LED current. Its operation can be understood by referring to the block diagram in Figure 3. At the start of each oscillator cycle, ...
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Using the above different scheme, the LED current can be controlled from 0% to 100% to its maximum value Iout(mA) FB DC( 1.8 2.2 1.6 9.2 1.4 19.6 1.2 31.1 1 43.4 0.8 63 ...
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Although small size and high efficiency are major concerns, the inductor should have low core losses at 1MHz and low DCR (copper wire resistance). Diode Selection To maintain high efficiency, the average current rating of the Schottky diode should be ...
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Package Description All the contains 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 and ...