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BA00CC0WCPV5 bảng dữ liệu(PDF) 10 Page - Rohm |
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BA00CC0WCPV5 bảng dữ liệu(HTML) 10 Page - Rohm |
10 / 20 page 10/22 Datasheet Datasheet BD60A00NUX BD60A60NUX © 2012 ROHM Co., Ltd. All rights reserved. www.rohm.com TSZ22111・15・001 TSZ02201-0G3G0C200320-1-2 27.SEP.2012 Rev.001 ●Operating of the application deficiency 1) When 1 LED or 1string OPEN during the operating Since FB terminal is set to 0V when set to OPEN, Output boosts up to the over voltage protection voltage. When over voltage is detected, the boosting operation stops and then output voltage goes down slowly. Later, if output voltage becomes less than hysteresis of over current protection, output voltage keeps boosting up to over voltage protection voltage again. Figure 3. LED open detect 2) When LED short-circuited in the plural Even if one LED short-circuits during boost operation, it usually passes along LED and it is turned on. By making LED shorted, FB terminal voltage increases by LED VF. Therefore output voltage becomes lower by LED VF, and the condition turns to be normal. Figure 4. One LED shorted Figure 5. FB terminal – VOUT terminal shorted FB FB output Vout FB voltage LED connection normal Open LED current 20mA 0mA Hysteresis voltage 0.7V+VF of LED FB VOUT LED current 20mA 0.7V LED short VF of LED VF of LED FB VOUT FB VOUT LED current 20mA 0.7V LED short VIN 5.9V 0.1mA 100µs |
Số phần tương tự - BA00CC0WCPV5 |
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Mô tả tương tự - BA00CC0WCPV5 |
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