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MP3204 Arkusz danych(PDF) 3 Page - Monolithic Power Systems |
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MP3204 Arkusz danych(HTML) 3 Page - Monolithic Power Systems |
3 / 8 page MP3204 – 6V, 1.3MHz WHITE LED DRIVER MP3204 Rev. 1.3 www.MonolithicPower.com 3 9/23/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. TM ELECTRICAL CHARACTERISTICS (continued) VIN = VEN = 5V, TA = +25°C, unless otherwise noted. Parameters Symbol Condition Min Typ Max Units Enable EN Threshold VEN Rising 1.0 1.35 1.6 V EN Threshold VEN Rising, VIN = 2.5V 0.8 V EN Hysteresis 90 mV EN Input Bias Current VEN = 0V, 5V 1 µA Feedback FB Voltage 94 104 114 mV FB Input Bias Current VFB = 0.1V -600 -300 nA Output Switch SW On-Resistance (4) RON 0.5 Ω SW Current Limit Duty Cycle = 60% 350 mA Thermal Shutdown (4) 160 °C Notes: 4) Guaranteed by design, not tested. PIN FUNCTIONS Pin # Name Description 1 SW Power Switch Output. SW is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to SW. SW can swing between GND and 25V. 2 GND Ground. 3 FB Feedback Input. The MP3204 regulates the voltage across the current sense resistor between FB and GND. Connect a current sense resistor from the bottom of the LED string to GND. Connect the bottom of the LED string to FB. The regulation voltage is 104mV. 4 EN Regulator On/Off Control Input. A high input at EN turns on the converter, and a low input turns it off. When not used, connect EN to the input source for automatic startup. The EN pin cannot be left floating. 5 OV Over Voltage Input. OV measures the output voltage for open circuit protection. Connect OV to the output at the top of the LED string. 6 IN Input Supply. This pin must be locally bypassed. |
Podobny numer części - MP3204 |
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Podobny opis - MP3204 |
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