{"product_id":"pololu-mp6550-single-brushed-dc-motor-driver-carrier","title":"Pololu MP6550 Single Brushed DC Motor Driver Carrier","description":"\u003cp\u003eThis tiny \u003ca href=\"\/zh\/collections\/pololu\"\u003ePololu\u003c\/a\u003e breakout board houses an MPS MP6550 motor driver that offers a wide operating voltage range of \u003cstrong\u003e1.8 V to 22 V\u003c\/strong\u003e and can deliver a \u003cstrong\u003econtinuous 1.7 A (2.5 A peak)\u003c\/strong\u003e to a single brushed DC \u003ca href=\"\/zh\/collections\/motors\"\u003emotor\u003c\/a\u003e. The MP6550 has \u003cstrong\u003ebuilt-in current sensing and current limiting\u003c\/strong\u003e and \u003cstrong\u003eprotection against under-voltage, over-current, and over-temperature\u003c\/strong\u003e conditions. The carrier board also adds \u003cstrong\u003ereverse-voltage protection up to 20 V\u003c\/strong\u003e.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThe MP6550 from Monolithic Power Systems (MPS) is an H-bridge motor driver IC that can be used for bidirectional control of one brushed DC motor at 1.8 V to 22 V. It can supply up to about 1.7 A continuously and features configurable current sensing and current limiting. Since this board is a carrier for the MP6550, we recommend careful reading of the \u003ca href=\"https:\/\/www.pololu.com\/file\/0J1925\/MP6550GG-Z.pdf\"\u003eMP6550 datasheet\u003c\/a\u003e. The board ships populated with all of its SMD components, including the MP6550.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e\u003c\/span\u003e \u003cstrong\u003eThis product can get hot enough to burn you long before the chip overheats.\u003c\/strong\u003e Take care when handling this product and other components connected to it.\u003c\/p\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eH-bridge motor driver: can drive one DC motor\u003c\/li\u003e\n\u003cli\u003eMotor supply voltage: 1.8 V to 22 V\u003c\/li\u003e\n\u003cli\u003eLogic supply voltage: 1.8 V to 4.9 V\u003c\/li\u003e\n\u003cli\u003eOutput current: up to 1.7 A continuous; operation at low motor and logic supply voltages reduces the maximum continuous output current\u003c\/li\u003e\n\u003cli\u003eCurrent control limits peak current to 2.5 A by default (this limit can be adjusted)\u003c\/li\u003e\n\u003cli\u003eUnder-voltage lockout and protection against over-current and over-temperature\u003c\/li\u003e\n\u003cli\u003eCarrier board adds reverse-voltage protection up to 20 V\u003c\/li\u003e\n\u003cli\u003eCompact size (0.5″×0.6″)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eIncluded hardware\u003c\/h2\u003e\n\u003cp\u003eTwo 1×6-pin breakaway 0.1″ male headers are included with the MP6550 motor driver carrier, which can be soldered in to use the driver with \u003ca href=\"\/zh\/collections\/solderless-breadboards\"\u003ebreadboards\u003c\/a\u003e, \u003ca href=\"\/zh\/collections\/prototyping-pcbs-and-perfboard\"\u003eperfboards\u003c\/a\u003e, or 0.1″ female connectors (the headers might ship as a single 1×12 piece that can be broken in half).\u003c\/p\u003e\n\u003cp\u003eThere are two possible board orientations when used with these header pins (parts visible or silkscreen visible) - see product images. You can also \u003ca href=\"\/zh\/collections\/soldering-supplies\"\u003esolder\u003c\/a\u003e your motor leads and other connections directly to the board.\u003c\/p\u003e\n\u003ch2\u003eUsing the motor driver\u003c\/h2\u003e\n\u003cp\u003eIn a typical application, power connections are made on one side of the board and control connections are made on the other. Aside from motor and power connections (including a logic voltage connection to SLEEP), the only required control pins are IN1 and IN2.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/MP6550_DIAGRAM_1.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe following simplified truth table shows how the driver operates:\u003c\/p\u003e\n\u003ctable width=\"477\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"64\"\u003e\u003cstrong\u003eIN1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"72\"\u003e\u003cstrong\u003eIN2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"92\"\u003e\u003cstrong\u003eOUT1\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"94\"\u003e\u003cstrong\u003eOUT2\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"155\"\u003e\u003cstrong\u003eOperating mode\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003eZ\u003c\/td\u003e\n\u003ctd\u003eZ\u003c\/td\u003e\n\u003ctd\u003ecoast (outputs off)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePWM\u003c\/td\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003ePWM (H\/Z)\u003c\/td\u003e\n\u003ctd\u003ePWM (L\/Z)\u003c\/td\u003e\n\u003ctd\u003eforward\/coast at speed PWM %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e0\u003c\/td\u003e\n\u003ctd\u003ePWM\u003c\/td\u003e\n\u003ctd\u003ePWM (L\/Z)\u003c\/td\u003e\n\u003ctd\u003ePWM (H\/Z)\u003c\/td\u003e\n\u003ctd\u003ereverse\/coast at speed PWM %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePWM\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003ePWM (L\/H)\u003c\/td\u003e\n\u003ctd\u003ereverse\/brake at speed 100% − PWM %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003ePWM\u003c\/td\u003e\n\u003ctd\u003ePWM (L\/H)\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003eforward\/brake at speed 100% − PWM %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003ebrake low (outputs shorted to ground)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePinout\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/MP6550_pinout_1.jpg\"\u003e\u003c\/p\u003e\n\u003ctable width=\"470\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"67\"\u003e\u003cstrong\u003ePin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"110\"\u003e\u003cstrong\u003eDefault State\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"293\"\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVIN\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e1.8 V to 22 V board power supply input (reverse-protected up to 20 V).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGND\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eGround connection points for the motor and logic supplies. The control source and the motor driver must share a common ground.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVM\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eThis pin gives access to the motor power supply after the reverse-voltage protection MOSFET (see the board schematic below). It can be used to supply reverse-protected power to other components in the system.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUT1\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eMotor output 1.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOUT2\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eMotor output 2.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIN1\u003c\/td\u003e\n\u003ctd\u003eLOW\u003c\/td\u003e\n\u003ctd\u003eControl input 1. PWM can be applied to this pin.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIN2\u003c\/td\u003e\n\u003ctd\u003eLOW\u003c\/td\u003e\n\u003ctd\u003eControl input 2. PWM can be applied to this pin.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSLEEP\u003c\/td\u003e\n\u003ctd\u003eLOW\u003c\/td\u003e\n\u003ctd\u003eSleep input that puts the MP6550 into a low-power sleep mode when low. By default, this pin is only connected to the nSLEEP_HB pin on the MP6550. It can also be connected to the nSLEEP_LDO pin to control the 3.3V LDO by bridging the nSLEEP surface mount jumper (see below).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eISET\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eCurrent sensing and current limiting configuration pin. A 2 kΩ resistor is connected from this pin to ground (see below).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVISEN\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003eCurrent sense output. This pin provides an analog current-sense feedback voltage of 200 mV\/A by default (see below).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eV3P3\u003c\/td\u003e\n\u003ctd\u003e-\u003c\/td\u003e\n\u003ctd\u003e3.3 V regulator output. Disabled by default (see below).\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eSLEEP pin and 3.3 V LDO\u003c\/h2\u003e\n\u003cp\u003eThe board’s SLEEP pin is connected to the nSLEEP_HB pin on the MP6550, which is internally pulled low, disabling the H-bridge and putting the driver into a low-power sleep mode. This can be used to conserve power when the device is not in use. Driving SLEEP high enables the driver.\u003c\/p\u003e\n\u003cp\u003eThe MP6550 has an internal 3.3 V low-dropout (LDO) regulator, although it is not enabled by default since the chip’s nSLEEP_LDO pin, which controls the regulator, is also internally pulled low. (The LDO does not need to be enabled for the rest of the driver to function.) By default, nSLEEP_LDO is not connected to anything on the carrier board, but by shorting the surface mount jumper shown in the picture below, nSLEEP_LDO can be tied to the board’s SLEEP pin. This allows the LDO to be enabled along with the rest of the driver when SLEEP is high. When enabled, the 3.3V regulator can supply up to 50 mA of current through the V3P3 pin.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0176\/3274\/files\/MP6550_SLEEP_1.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCurrent sensing and current limiting\u003c\/h3\u003e\n\u003cp\u003eThe MP6550 can sense the motor current and actively limit it by using constant-off-time PWM current regulation (current chopping). The feedback sensitivity and current limiting threshold are set by a resistance connected between the ISET pin and ground.\u003c\/p\u003e\n\u003cp\u003eThe carrier board is populated with a 2 kΩ pull-down resistor on ISET, which makes the VISEN pin output a voltage of 200 mV\/A and limits the current to 2.5 A by default. This behaviour can be customized by adding an external pull-down resistor to the ISET pin in parallel with the one already on the carrier. This will reduce the overall resistance, increasing the current limit and decreasing the VISEN sensitivity. If you want to reduce the current limit and increase the VISEN sensitivity, you would need to remove the surface mount resistor and replace it with a surface mount or external resistor of a larger value. Refer to the MP6550 datasheet for more information about the driver’s current sensing and current limiting.\u003c\/p\u003e\n\u003ch3\u003eReal-world power dissipation considerations\u003c\/h3\u003e\n\u003cp\u003eThe MP6550 datasheet recommends a maximum continuous current of 2 A. However, the chip by itself will typically overheat at lower currents. In our tests, we found that for most combinations of logic (VCC) and motor supply (VIN) voltages, the chip was able to deliver 2 A for between 30 seconds and a few minutes before the chip’s thermal protection kicked in and disabled the motor outputs; a continuous current of 1.7 A was sustainable for many minutes without triggering a thermal shutdown.\u003c\/p\u003e\n\u003cp\u003eThe actual current you can deliver will depend on how well you can keep the motor driver cool. The carrier’s printed circuit board is designed to help with this by drawing heat out of the motor driver chip. Our tests were conducted at 100% duty cycle with no forced air flow; PWMing the motor will introduce additional heating proportional to the frequency.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable width=\"427\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"320\"\u003e\u003cstrong\u003eMotor driver\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd width=\"107\"\u003eMP6550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMotor channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum operating voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum operating voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e22 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContinuous output current per channel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.7 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePeak output current per channel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCurrent sense\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.2 V\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum PWM frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMinimum logic voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum logic voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.9 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReverse voltage protection?\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eY\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeader pins soldered?\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5″ × 0.6″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eResources\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1924\/mp6550-single-brushed-dc-motor-driver-carrier-schematic.pdf\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1925\/MP6550GG-Z.pdf\"\u003eDatasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1926\/mp6550-single-brushed-dc-motor-driver-carrier-dimensions.pdf\"\u003eDimensions\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1927\/mp6550-single-brushed-dc-motor-driver-carrier.step\"\u003e3D Model\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.pololu.com\/file\/0J1928\/md44a-drill.dxf\"\u003eDrill guide\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Pololu","offers":[{"title":"Default Title","offer_id":50847539790097,"sku":"POL-4733","price":4.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0901\/6285\/6209\/files\/pololu-mp6550-single-brushed-dc-motor-driver-carrier-pololu-pol-4733-41449528197315.jpg?v=1735214941","url":"https:\/\/abcd3032.myshopify.com\/zh\/products\/pololu-mp6550-single-brushed-dc-motor-driver-carrier","provider":"Tayyab Zak","version":"1.0","type":"link"}