{"product_id":"high-current-dc-dc-converter-12v-6a-output-from-16v-to-38v-dc-input","title":"High Current DC-DC Converter – 12V\/6A Output from 16V to 38V DC Input","description":"\u003cp\u003eThe project presented here is a low quiescent current, synchronous buck converter featuring the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLTC3807\u003c\/strong\u003e. This DC-DC converts a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e16V to 38V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003einput voltage to a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e12V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eat\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e6A\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eoutput. The main features of this board include an internal LDO for gate drive power from V\u003csub\u003eIN\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003eor EXTVCC, RUN pins, a mode selector jumper CN1 that allows the converter to run in constant current mode (CCM), pulse-skipping or Burst Mode operation, and selectable current limit. Output is fixed and provides\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e12V DC\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ebut it supports an adjustable output voltage. Refer to the datasheet below to learn more about the adjustable output. The circuit has also soft-start and tracking. The wide input voltage range of 16V to 38V is suitable for automotive and distributed DC power systems where the low quiescent current is essential. The operating frequency is set to\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e120Khz\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eusing resistor R6. MOSFETs are mounted under the PCB for easy heatsink mounting, it is important to use a heatsink for a full current load.\u003c\/p\u003e\n\u003ch3\u003eMain Control Loop\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eLTC3807\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003euses a constant frequency, current mode step-down architecture. During normal operation, the external top MOSFET is turned on when the clock for that channel sets the RS latch and is turned off when the main current comparator, I\u003csub\u003eCMP\u003c\/sub\u003e, resets the RS latch. The peak inductor current at which I\u003csub\u003eCMP\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003etrips and resets the latch is controlled by the voltage on the I\u003csub\u003eTH\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003epin, which is the output of the error amplifier, EA. The error amplifier compares the output voltage feedback signal at the V\u003csub\u003eFB\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003epin (which is generated with an external resistor divider connected across the output voltage, VOUT, to ground) to the internal\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e0.800V\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ereference voltage. When the load current increases, it causes a slight decrease in V\u003csub\u003eFB\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003erelative to the reference, which causes the EA to increase the I\u003csub\u003eTH\u003c\/sub\u003e\u003cspan\u003e \u003c\/span\u003evoltage until the average inductor current matches the new load current. After the top MOSFET is turned off each cycle, the bottom MOSFET is turned on until either the inductor current starts to reverse, as indicated by the current comparator IR, or the beginning of the next clock cycle.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWide VIN Range: 16V to 38V (40V Abs Max)\u003c\/li\u003e\n\u003cli\u003eOutput 12V DC Load Up to 6Amps\u003c\/li\u003e\n\u003cli\u003eLow Operating IQ: 50μA\u003c\/li\u003e\n\u003cli\u003eOutput Voltage 12V (Adjustable Range: 0.8V ≤ VOUT ≤ 24V Read Note 2)\u003c\/li\u003e\n\u003cli\u003eFrequency 120khz\u003c\/li\u003e\n\u003cli\u003eSelectable Continuous, Pulse-Skipping or Low Ripple Burst Mode Operation at Light Load\u003c\/li\u003e\n\u003cli\u003eOver Current Limit\u003c\/li\u003e\n\u003cli\u003eEfficiency up to 95%\u003c\/li\u003e\n\u003cli\u003eVery Low Dropout Operation: 99% Duty Cycle\u003c\/li\u003e\n\u003cli\u003eInbuilt Soft-Start\u003c\/li\u003e\n\u003cli\u003eOutput Overvoltage Protection\u003c\/li\u003e\n\u003cli\u003eLow Shutdown IQ: 14μA\u003c\/li\u003e\n\u003cli\u003eInternal LDO Powers Gate Drive from VIN or EXTVCC\u003c\/li\u003e\n\u003cli\u003eNo Current Foldback During Start-Up\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 71.44 x 41.75mm\u003c\/li\u003e\n\u003cli\u003e4 x 3mm Mounting Holes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":46962801017004,"sku":"G143","price":48.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/G143.jpg?v=1787133230","url":"https:\/\/dotfry.com\/products\/high-current-dc-dc-converter-12v-6a-output-from-16v-to-38v-dc-input","provider":"dotfry","version":"1.0","type":"link"}