{"product_id":"solenoid-relay-valve-driver-with-current-regulation","title":"Solenoid, Relay, Valve Driver with Current Regulation","description":"\u003cp\u003eThe project presented here is a PWM current driver for solenoids, Relays, and valves. The board will regulate the current with a well-controlled waveform to activate and reduce power dissipation at the same time. The solenoid current is ramped up fast to ensure the opening of the valve or relay. After the initial ramping, the solenoid current is kept at peak value to ensure the correct operation, after which it is reduced to a lower hold level in order to avoid thermal problems and reduce power dissipation.\u003c\/p\u003e\n\u003cp\u003eThe peak current duration is set at\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e78ms\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ewith an external capacitor C2. The current ramp peak level can be adjusted using the\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePR1\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003etrimmer potentiometer in the range\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e83mA to 250mA\u003c\/strong\u003e, the default PWM frequency is\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20KHz\u003c\/strong\u003e, PWM frequency can be changed between\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e20Khz to 60Khz\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eusing the external resistor R4. The enable pin has an internal pull-up, so normally chip is enabled, pulling down the enable pin brings the chip into disable mode.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePower Supply 6V to 24V DC\u003c\/li\u003e\n\u003cli\u003eLoad Current up to 250mA\u003c\/li\u003e\n\u003cli\u003ePeak Current Duration 78mS\u003c\/li\u003e\n\u003cli\u003ePeak Current Adjustable range 83mA to 250mA\u003c\/li\u003e\n\u003cli\u003eStart-Up Delay Approx 25uS\u003c\/li\u003e\n\u003cli\u003ePWM Frequency 20Khz\u003c\/li\u003e\n\u003cli\u003eOn Board Switch to disable the output\u003c\/li\u003e\n\u003cli\u003eEnable Pin for External Connector\u003c\/li\u003e\n\u003cli\u003eHeader Connector for Power and Solenoid\u003c\/li\u003e\n\u003cli\u003eFast Ramp-Up of Solenoid Current to Guarantee Activation\u003c\/li\u003e\n\u003cli\u003eIntegrated Sense Resistor for Regulating Solenoid Current\u003c\/li\u003e\n\u003cli\u003eSolenoid Current is Reduced in Hold Mode for Lower Power and Thermal Dissipation\u003c\/li\u003e\n\u003cli\u003eInternal Supply Voltage Regulation\u003c\/li\u003e\n\u003cli\u003eThermal Shutdown, Threshold 160 Degree Centigrade\u003c\/li\u003e\n\u003cli\u003eUndervoltage Lockout (UVLO), Threshold 4.6V\u003c\/li\u003e\n\u003cli\u003eCompact Design\u003c\/li\u003e\n\u003cli\u003ePCB Dimensions 22.23 x 17.78mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eConnections and Other Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCN1: Pin 1 Enable (High = Enable, Low = Disable) High = 4V to 7V, Pin 2 = GND\u003c\/li\u003e\n\u003cli\u003eCN2: Pin 1 VCC 6V to 24V DC, Pin 2 = GND\u003c\/li\u003e\n\u003cli\u003eSL1: Pin 1 = Solenoid, Pin 2 VCC (Connections for Solenoid)\u003c\/li\u003e\n\u003cli\u003eD2: Power LED\u003c\/li\u003e\n\u003cli\u003eSW1: Disable Switch Push to Disable\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"dotfry","offers":[{"title":"Default Title","offer_id":47171096182956,"sku":"G156","price":22.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0757\/6436\/7532\/files\/G156A.jpg?v=1789028170","url":"https:\/\/dotfry.com\/products\/solenoid-relay-valve-driver-with-current-regulation","provider":"dotfry","version":"1.0","type":"link"}