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5WATTVSA 데이터시트(PDF) 1 Page - Volgen Kaga Electronics Inc. |
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5WATTVSA 데이터시트(HTML) 1 Page - Volgen Kaga Electronics Inc. |
1 / 7 page Application Notes Ultra High Efficiency 82 - 91% High Efficiency, Small, Low price, Step-Down DC-DC Converter 5 Watt VSA Series <Usage> (A) Standard Connection Recommended Additional Capacitor VSA05-2.5S1R2 C1=16ZL330M (Rubycon) or KZE16VB330 (Nippon Chemi-con) C2=10ZL680M (Rubycon) or KZE16VB680 (Nippon Chemi-con) VSA24-3.3S1R2 C1=50ZL120M (Rubycon) or KZE50VB120(Nippon Chemi-con) C2=10ZL470M (Rubycon) or KZE10VB470(Nippon Chemi-con) VSA24-12S0R6 C1=50ZL120M (Rubycon) or KZE50VB120(Nippon Chemi-con) C2=16ZL330M (Rubycon) or KZE16VB330(Nippon Chemi-con) Note 1: If ON/OFF is not controlled, it should be connected to GND line. Note 2: When output voltage is rating, please open the terminal V. ADJ ( Figure 4 ) (5 pin) Note 3: I/O capacitor (C1, C2) must be added. Please put I/O capacitor to pin close as much as possible and wire with thick pattern. For C1 & C2, please use low impedance capacitor. Note 4: For VSA05 model, when the additional capacitor's capacity is large, startup failure may occur. So please use an additional capacitor which capacity is 8,200µF or below. (B) ON/OFF Control Input voltage is turned on by using ON/OFF control function, and it is possible for ON/OFF control of output voltage without cutting it. That is the effective function to compose the sequence of Power Supply Systems. Also using this function, you can save the electric power when Power Supply stands by. Please connect the terminal ON/OFF with GND. Between the terminal ON/OFF (1 Pin) and GND (3 Pin) VSA05-2.5S1R2 Output voltage OFF mode : OPEN (2V to +Vin) Output voltage ON mode : SHORT (-0.2 to 0.7V, 10µA) ( Figure 5 ) VSA24-3.3S1R2 Output voltage OFF mode : OPEN (2.5 to 5.3 V) Output voltage ON mode : SHORT (-0.2 to 0.5 V, 250µA ) VSA24-12S0R6 Output voltage OFF mode : OPEN (2.5 to 5.3 V) Output voltage ON mode : SHORT (-0.2 to 0.5 V, 250µA ) Note 1: Use an open collector (or drain) switch element for on/ off control. Note 2: Set the switch element for on/ off control close to the converter, and lessen the noise effect by parallel patern short loops, or by using shield wires. To prevent miss operation caused by noise, it is effective to connect a capacitor between the on/ off pin and GND. However, if this capacitor is too large, when impressing the input voltage at off, the charged current may flow and momentarily voltage may occur, so be sure that the max. value is 3300pF. Note 3: The on/ off pin voltage will be pulled up internally, so it is not necessary to impress voltage externally at off. Kaga Electronics(USA) Inc. www.volgen.com |
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