Smart Pulse Power Supply

  The Smart Pulse Power Supply is a portable smart power device specifically designed for coil driving. Based on a high-performance MCU core, the system integrates a boost drive circuit and precision pulse generation logic. It supports three adjustable levels of high-frequency, high-voltage pulse output, providing stable excitation energy for various coil loads through precise duty cycle and frequency control. Featuring a minimalist single-button and digital tube interaction design, along with a comprehensive battery management and safety protection system, it is ideal for driving and controlling electromagnets, micro vibrators, and various induction coils.

Pulse Output Mode:

• Output Voltage: 24V (Generated by the internal boost circuit).
• Duty Cycle: Fixed at 20%.
• Current Characteristics: Average current of 0.1A, with a momentary peak current of 0.5A.

Frequency Levels:

• Level 1: 10Hz (Low-frequency, high-force drive).
• Level 2: 40Hz (Mid-frequency, balanced drive).
• Level 3: 80Hz (High-frequency, fast-response drive).

Power Management Parameters:

• Cell Discharge Cutoff Voltage: Single cell 2.9V (Precise detection to prevent over-discharge).
• Capacity Release Target: Ensures that 90% of the total battery capacity is released before the cutoff threshold is reached.

Charging Input:

• Interface Type: USB Type-C.
• Input Voltage: 5V DC.

Power Drive Stage:

• Boost Inductor and MOSFET: A high-power shielded inductor combined with an N-MOSFET is onboard to build a BOOST step-up topology, boosting the battery voltage to 24V to drive the coil load.
• Output Interface: Wire soldering pads (Output Pads) are reserved for directly connecting the coil leads.

Main Control and Interaction Unit:

• MCU Controller: The core processing unit responsible for PWM waveform generation, button scanning, and digital tube dynamic scanning.
• Digital Tube Display: An onboard LED digital tube is used to intuitively display the remaining battery percentage and the current working level.
• Tactile Button: Located at the edge of the board for power on/off, level switching, and start/stop control.

Power Interfaces:

• USB Type-C Receptacle: Supports 5V charging input.
• Battery Connection Terminal: Connects to the lithium battery pack via soldering wires or terminal blocks.

To ensure the safety of both the coil drive and the equipment, the controller incorporates multiple hardware and software protection mechanisms:

• Over-Discharge Protection (UVLO): Real-time monitoring of the cell voltage; the discharge circuit is immediately cut off and pulse output is stopped once the 2.9V cutoff threshold is reached.

• No-Load/Timeout Auto Power-Off: If the system is in a state of no output and no button operation for more than 5 seconds, it automatically enters power-off mode to prevent accidental battery depletion.

• Output Short-Circuit Protection: If a short circuit occurs at the 24V output terminal, the hardware circuit shuts down the MOSFET within milliseconds to prevent damage to the drive chip.

• Charging Protection: A built-in charge management chip prevents damage to the internal circuit from over-voltage or reverse connection during 5V input.

Button Operation Logic (Single Multi-function Button):

• Power On / Level Switching:
  • 1st Short Press: Power on, default output at Level 1 (10Hz).
  • 2nd Short Press: Switch to Level 2 (40Hz).
  • 3rd Short Press: Switch to Level 3 (80Hz).
  • Note: If the pulse is currently outputting, a short press cannot switch levels; the output must be stopped first.

Start/Stop Output:

• Long Press: Starts pulse output; if currently outputting, a long press will stop the output.
• Auto Sleep: The device automatically powers off after 5 seconds of no output and no button operation.

Display Interaction:

• Alternating Display: The screen cyclically alternates between displaying the remaining battery percentage and the current level number (1/2/3).

Timing Logic:

• Default Duration: A single operation cycle is set to 30 minutes.
• Non-Cumulative Timing: If stopped midway, restarting will initiate a new 30-minute cycle without accumulating the previous runtime.