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SS8028T11TR Datasheet(PDF) 8 Page - Silicon Standard Corp. |
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SS8028T11TR Datasheet(HTML) 8 Page - Silicon Standard Corp. |
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8 / 9 page  www.SiliconStandard.com 8 of 9 SS8028 minimize the output ripple voltage, but proper selection of the inductor and the output capacitor also plays a big role. If a larger inductance value or a smaller capacitance value is used, the output ripple voltage will increase because the capacitor will be slightly overcharged each burst cycle. To reduce the output ripple, increase the output capacitance value, or add a 10pF feed-forward capacitor in the feedback network of the SS8028 (see the circuits in the Typical Applications section). To add this small inexpensive 10pF capacitor will greatly reduce the output voltage ripple. TYPICAL APPLICATION CIRCUITS Boost Converter SEPIC Converter VCC SW SHDN FB GND G5111 C2 22µF C1 4.7µF R2 120k 2.5V to 4.2V R1 390k 5V 50mA D1 VCC SW SHDN FB GND C2 22µF C1 4.7µF R2 270k V 2.5V to 4.2V R1 470k 3.3V 60mA 1 L2 10µH D1 VCC SW SHDN FB GND C2 22µF C1 4.7µF V IN 5V 50mA D1 GND C2 22µF C1 4.7µF IN 3.3V 60mA L1:MURATA LQH3C4R7M24 D1:MOTOROLA MBR0520 L1,L2:MURATA LQH3C100K24 D1:MOTOROLA MBR0520 L2 10µH D1 C3 1uF L1 10uH L1 4.7uH R1 30_1% R2 120k_1% Dimming Ratio>50:1 Drive 2~4 White LEDs R3 308k_1% R4 660k_1% VBIAS(+3.3V) PWM Dim PWM Dimming Control VH=3.3V VL=0V Freq=160~240Hz D2(Optional) 18V C2 1µF D1 MBR0520 L1 10µH/0.5A SW VCC SHDN FB GND VBAT 2.5V~5.5V C1 4.7µF ON/OFF Control R1 30_1% R2 120k_1% Dimming Ratio>50:1 Drive 2~4 White LEDs R3 308k_1% R4 660k_1% VBIAS(+3.3V) PWM Dim PWM Dimming Control VH=3.3V VL=0V Freq=160~240Hz D2(Optional) 18V C2 1µF D1 MBR0520 L1 10µH/0.5A SW VCC SS8028 SHDN FB GND VBAT 2.5V~5.5V C1 4.7µF ON/OFF Control White LED Driver Rev.2.02 12/06/2003 |
Número de pieza similar - SS8028T11TR |
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Descripción similar - SS8028T11TR |
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