MP3305 MPS, MP3305 Datasheet
MP3305
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MP3305 Summary of contents
Page 1
... PWM dimming audible noise. The MP3305 is turned off if an over-voltage condition is present due to an open circuit condition. Use one external resistor voltage divider to adjust OVP threshold. MP3305 also includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP Part Number* QFN8 (2mm x 3mm) MP3305DD * For Tape & Reel, add suffix –Z (e.g. MP3305DD–Z).For RoHS compliant packaging, add suffix –LF ABSOLUTE MAXIMUM RATINGS SW Pin, LED Pin..........................–0.5V to +36V All Other Pins ..............................– ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP ELECTRICAL CHARACTERISTICS 5V +25°C, unless otherwise noted Parameters Operating Input Voltage Supply Current (Shutdown) Supply Current (Quiescent) Switching Frequency Maximum Duty Cycle Under Voltage Lockout ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP PIN FUNCTIONS QFN8 Name Pin Function Pin # Power Switch Output the drain of the internal MOSFET switch. Connect the power 1 SW inductor and output rectifier to SW. SW can swing between GND and 36V. ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP TYPICAL PERFORMANCE CHARACTERISTICS 200mA, 3WLEDs 10Strings, unless otherwise noted. IN LED V vs. Efficiency IN 100 3.5 4 4.5 5 5.5 6 6.5 V (V) IN Enable Startup SW 10V/div EN 5V/div V OUT 5V/div ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP OPERATION The MP3305 uses a constant frequency, peak current mode boost regulator architecture to regulate the series string of white LEDs. The operation of the MP3305 can be understood by referring to the block diagram of Figure 1. ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP APPLICATION INFORMATION Enable/ Dimming Control Figure 2—Circuit for Driving 10 Strings of 3 WLEDs A typical application circuit can be seen in Figure 2. The 10 strings of 3 white LEDs can be driven from output current of 200mA. ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP Layout Considerations Careful attention must be paid to the PCB board layout and components placement. Proper layout of the high frequency switching path is critical to prevent noise and electromagnetic interference problems ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP TYPICAL APPLICATION CIRCUITS VIN C1 3.3V -18V 10uF 25V 7.5 D2 5.6V ZENER Optional Bias Circuit EN GND Figure 4 — Driving 27 WLEDs (9 WLEDs in Series and 3 Strings Paralleled) with 3.3V-18V Input Voltage In order to improve the MOSFET on-resistance at low input voltage and make the chip compatible for high input voltage, the additional bias circuit should be used ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP TYPICAL APPLICATION CIRCUITS VIN 16V C2 16V EN GND Figure 6 — Driving 10 WLEDs in Series with 5V Input Voltage MP3305 Rev. 0.9 12/18/2009 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. ...
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... MP3305 –36V, 1.3A, STEP-UP WHITE LED DRIVER WITH HIGH FREQUENCY TRUE PWM DIMMING & ADJUST OVP PACKAGE INFORMATION 2.90 3.10 PIN 1 ID MARKING PIN 1 ID INDEX AREA TOP VIEW 0.20 REF SIDE VIEW 2.90 0.70 1.70 0.25 0.50 RECOMMENDED LAND PATTERN NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application ...