yb1522 YOBON TECHNOLOGIES,INC., yb1522 Datasheet
yb1522
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yb1522 Summary of contents
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... The YB1522 can drive up to 3S10P white LEDs from a single Li-Ion battery. At automotive (5V/12V) applications higher conversion efficiency. To control ...
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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 Order Number Package Type YB1522ST25 SOT23-5 YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver SOT23-5 Figure 2: Pin Configuration Description Supplied As 3000 units Tape & Reel www ...
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... P power dissipation will cause excessive die temperature. All limits at temperature extremes are guaranteed via correlation using standard statistical methods. YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver Recommended Operating Conditions Operating Temperature......... -40°C to 85°C Supply Voltage ...
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... Typical Performance Characteristics C1=1uF/16V L1=33uH/CD43 Output Waveform Vin & Efficiency 95% 90% 85% 80% 75% 70% 65% 60% 2.5 3 3.5 4 Vin (V) YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver C2=10uF/16V R1=0.71Ω 180 160 140 120 100 80 2.5 4.5 5 5.5 6 www.yobon.com.tw YB1522 Output Ripple Vin & Iout 3 3.5 4 4.5 5 5.5 Vin ( ...
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... C1=1uF/16V L1=33uH/CD43 Output Waveform Vin & Efficiency 88% 86% 84% 82% 80% 78% 76% 74% 72% 2.5 3 3.5 4 Vin(V) YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver C2=10uF/16V R1=0.62Ω 250 200 150 100 50 0 4.5 5 5.5 6 www.yobon.com.tw YB1522 Output Ripple Vin & Iout 2.5 3 3.5 4 4.5 5 Vin(V) 5 ...
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... C1=1uF/16V L1=33uH/CD43 Output Waveform Vin & Efficiency 80% 78% 76% 74% 72% 70% 68% 66% 2.5 3 3.5 4 Vin(V) YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver C2=10uF/16V R1=0.55Ω 200 180 160 140 120 100 80 4.5 5 5.5 6 www.yobon.com.tw YB1522 Output Ripple Vin & Iout 2.5 3 3.5 4 4.5 5 Vin (V) 5 ...
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... C1=1uF/16V L1=33uH/CD43 Output Waveform Vin & Efficiency 72% 70% 68% 66% 64% 62% 60% 58% 2.5 3 3.5 4 Vin (V) YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver C2=10uF/16V R1=0.5Ω 250 200 150 100 50 0 2.5 4.5 5 5.5 6 www.yobon.com.tw YB1522 Output Ripple Vin & Iout 3 3.5 4 4.5 5 5.5 Vin ( ...
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... Switching Frequency 932.2 932 931.8 931.6 Khz 931.4 931.2 931 930 Vin(V) Switch Leakage Current 0.5 0.4 0.3 uA 0.2 0 Vin (V) YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver 250 200 150 100 www ...
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... Figure 3: YB1522 Block Diagram Application Information Soft Start and Current Limit The internal soft start circuit minimizes the inrush current during turning on YB1522. The maximum switch current is limited to about 650mA by the chip. LED Current and Dimming Control The LED’s current is set by a resistor ...
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... V (V) V (mV 1.8 2.2 1.6 9.2 1.4 19.6 1.2 31.1 1 43.4 0.8 63 0.6 74 0.4 86.4 0.2 96.9 0 102 Figure 4: Dimming Control Using a DC Voltage YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver I (mA) OUT 0 0.43 1.8 3.6 6 8.5 12.3 14.5 16 Figure 5: Dimming Control Using a Filtered PWM www.yobon.com.tw YB1522 Duty I (mA) OUT 0% 20 20% 17.4 30% 15 40% 12.4 50% 10 60% 8 70% 6 ...
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... In the cases of open circuit or the LEDs failure, the LEDs are disconnected from the circuit, and the feedback voltage will be zero. The YB1522 will then switch to a high duty cycle resulting in a high output voltage, which may cause SW pin voltage to exceed its maximum 30V rating ...
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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. YB1522 Rev.1.0 Step-up DC-DC Converter White LED Driver www.yobon.com.tw YB1522 12 ...