mic3202 Micrel Semiconductor, mic3202 Datasheet
mic3202
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mic3202 Summary of contents
Page 1
... High-frequency switching operation 1MHz allows the use of smaller external components, minimizing space and cost. The MIC3202 offers a frequency dither feature for low-EMI applications. The MIC3202 operates over a junction temperature from −40°C to +125°C and is available in an 8-pin e-PAD SOIC package ...
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... EP GND Connect to PGND. September 2010 Marking Junction Temperature Range −40°C to +125°C MIC3202YME −40°C to +125°C 8-Pin ePAD SOIC MIC3202/MIC3202-1 2 MIC3202/MIC3202-1 Package PWM 8-Pin SOIC Dither 8-Pin SOIC Non-Dither M9999-091710-A ...
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... V Current-Sense Lower Threshold CS(MIN) V Hysteresis CS V Current-Sense Response Time CSHYS Current-Sense Input Current Frequency F Maximum Switching Frequency MAX Dithering (MIC3202 Hysteresis Dithering Range DITH CS F Frequency Dithering Range DITHER Enable Input EN EN Logic Level High HI EN Logic Level Low EN Bias Current ...
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... T J Condition V = 12V DIM DIM I = 200mA 0V Rising J 4 ≤ +125°C; unless noted. J Min. Typ. 2.0 20 0.1 275 = 37V 5 160 20 MIC3202 Max. Units V 0 µ kHz 625 mΩ 50 µA °C M9999-091710-A ...
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... INPUT VOLTAGE (V) Switch R vs. Input Voltage 425 375 325 275 DIM V =OPEN LED LED 225 INPUT VOLTAGE (V) MIC3202 6LED 8LED OPEN OUT NO-SWITCHING =3.5V LED I =1A LED DSON V = 3.5V LED ...
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... TEMPERATURE (°C) Switch R DSON vs. Switch Current 290 285 280 275 V = 3.5V LED V = 12V IN 270 0.0 0.3 0.5 0.8 1.0 SWITCH CURRENT (A) 6 MIC3202 V UVLO Threshold IN vs. Temperature 4.5 Rising 4.0 3 12V Falling 3.5V LED LED L = 47uH 3.0 -50 - 100 130 TEMPERATURE (°C) V Voltage CC vs ...
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... Micrel, Inc. Functional Characteristics September 2010 7 MIC3202 M9999-091710-A ...
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... Micrel, Inc. Functional Characteristics (Continued) September 2010 8 MIC3202 M9999-091710-A ...
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... The MIC3202 has an EN pin which gives the flexibility to enable and disable the output with logic high and low signals. The MIC3202 also has a DIM pin which can turn on and off the LEDs HIGH state. This DIM pin controls the with respect to V ...
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... This makes the control scheme very popular to achieve low dimming duty cycles. LED Current and R CS The main function of the MIC3202 is to control the LED current accurately within ±5% of the set current. A high- side R resistor sets LED current. The following CS ...
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... LED. 515 Frequency Dithering = 36V, 8 LEDs The MIC3202 is designed to reduce EMI by dithering the switching frequency ± 12% in order to spread the noise spectrum over a wider range. This lowers the EMI noise peaks generated by the switching regulator. Switching regulators generate noise by their nature and they are the main EMI source to interference with nearby circuits ...
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... A ground plane is required to control EMI and minimize the inductance in power, signal and return paths. The following guidelines should be followed to insure proper operation of the MIC3202 regulator. IC Use thick traces to route the input and output power lines. Signal and power grounds should be kept separate and connected at only one location ...
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... If there does not happen to be any non-shielded bus wire immediately available, the leads from axial resistors will work. By maintaining the shortest possible ground lengths on the oscilloscope probe, true ripple measurements can be obtained. September 2010 Figure 2. Low-Noise Measurement 13 MIC3202 M9999-091710-A ...
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... Micrel, Inc. Evaluation Board Schematic September 2010 Figure 3. MIC3202 Application Circuit (R9 is for test purposes only) 14 MIC3202 M9999-091710-A ...
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... Resistor, 1%, Size 0603 (8) Vishay 0Ω Resistor, 1%, Size 0603 (8) Vishay 49.9Ω Resistor, 1%, Size 0603 (9) Bourns POT 100kΩ 3/8" SQ CERM SL ST (10) Micrel, Inc. High Brightness LED Driver with High-Side Current Sense (10) Micrel, Inc. RC Time/Oscillator (SOT-23-5) 15 MIC3202 Qty ...
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... Micrel, Inc. PCB Layout Recommendation September 2010 Top Assembly Top Layer 16 MIC3202 M9999-091710-A ...
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... Micrel, Inc. PCB Layout Recommendation (Continued) September 2010 Bottom Layer 17 MIC3202 M9999-091710-A ...
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... Micrel, Inc. Package Information September 2010 8-Pin ePAD SOIC (ME) 18 MIC3202 M9999-091710-A ...
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... Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully indemnify September 2010 8-Pin ePAD SOIC (ME) Micrel for any damages resulting from such use or sale. © 2010 Micrel, Incorporated. 19 http://www.micrel.com M9999-091710-A MIC3202 ...