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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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EV0021 데이터시트(PDF) 1 Page - Monolithic Power Systems |
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EV0021 데이터시트(HTML) 1 Page - Monolithic Power Systems |
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1 / 4 page  EV0021 MP1521 High Efficiency White LED Driver EVALUATION BOARD EV0021 Rev 1.1_01/21/03 www.monolithicpower.com 1 Monolithic Power Systems General Description The EV0021 evaluation board uses the MP1521 to drive up to three strings of 5 White LEDs. This MP1521 uses a peak current, constant minimum off-time architecture and has three individual current-sensing feedbacks. The OLS pin is designed for detecting loose or open LED connections. The feedback pins measure voltage across sense resistors in series with the LED strings. When supplying a bias current of 20mA, the voltage drop across the sense resistor is only 0.4V to minimize power loss. Either a DC voltage or a PWM signal at the BRT/PWM input can control the LED brightness. The MP1521 has an on board power MOSFET switch that is protected by current limit, open load shutdown, thermal shutdown, and under voltage lockout. Ordering Information Board Number MPS IC Number EV0021 MP1521EQ Absolute Maximum Ratings Supply Voltage (VIN) 28V Switch Voltage to GND -0.5V to 28V VEN,VREF, VBRT, VFB1, VFB2, VFB3 –0.3V to 6V Storage Temperature -55 °C to +150°C Recommended Operating Conditions Supply Voltage (VIN) 2.7 V to 25V Figure 1: EV0021 Evaluation Board |
유사한 부품 번호 - EV0021 |
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유사한 설명 - EV0021 |
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