Solenoid, Relay, Valve Driver with Current Regulation

  • Rajkumar Sharma
  • 135 Views
  • easy
  • Tested
  • SKU: EL141008
  • Quote Now

The 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.

The peak current duration is set at 78ms with an external capacitor C2. The current ramp peak level can be adjusted using the PR1 trimmer potentiometer in the range 83mA to 250mA, the default PWM frequency is 20KHz, PWM frequency can be changed between 20Khz to 60Khz using 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.

JF-1564B Solenoid

Features

  • Power Supply 6V to 24V DC
  • Load Current up to 250mA
  • Peak Current Duration 78mS
  • Peak Current Adjustable range 83mA to 250mA
  • Start-Up Delay Approx 25uS
  • PWM Frequency 20Khz
  • On Board Switch to disable the output
  • Enable Pin for External Connector
  • Header Connector for Power and Solenoid
  • Fast Ramp-Up of Solenoid Current to Guarantee Activation
  • Integrated Sense Resistor for Regulating Solenoid Current
  • Solenoid Current is Reduced in Hold Mode for Lower Power and Thermal Dissipation
  • Internal Supply Voltage Regulation
  • Thermal Shutdown, Threshold 160 Degree Centigrade
  • Undervoltage Lockout (UVLO), Threshold 4.6V
  • Compact Design
  • PCB Dimensions 22.23 x 17.78mm

Connections and Other Details

  • CN1: Pin 1 Enable (High = Enable, Low = Disable) High = 4V to 7V, Pin 2 = GND
  • CN2: Pin 1 VCC 6V to 24V DC, Pin 2 = GND
  • SL1: Pin 1 = Solenoid, Pin 2 VCC (Connections for Solenoid)
  • D2: Power LED
  • SW1: Disable Switch Push to Disable

Schematic

Parts List

NO.QNTY.DESC.REF.MANUFACTURERSUPPLIER SUPPLIER PART NO
12CN1,CN22 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
21C1100nF/50V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
31C21uF/35V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
41C310uF/35V CERAMIC SMD SIZE 0805YAGEO/MURATADIGIKEY
51D11N4007 SMD DIODEDIODE INCDIGIKEYS1MBDITR-ND
61D2LED RED SMD SIZE 0805OSRAMDIGIKEY475-1278-1-ND
71PR11M TRIMMER POTENTIOMETERBOURNSDIGIKEY3362P-105LF-ND
81R1DNP
91R21K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
101R33.3K 5% SMD SIZE 0805YAGEO/MURATADIGIKEY
111R4200K 1% SMD SIZE 0805YAGEO/MURATADIGIKEY
121SL12 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5315-ND
131SW1TACTILE SWITCHC&KDIGIKEYCKN9085CT-ND
141U1DRV120TIDIGIKEY296-34777-1-ND

Connections

Output Measurements

Gerber View

Photos

Video

DRV120 Datasheet

Please follow and like us:
Pin Share

PCB

Subscribe
Notify of
guest

0 Comments
Inline Feedbacks
View all comments

RELATED PROJECTS

TOP PCB Companies