90W Programmable Benchtop Power Supply Kit

August 09, 2019 by Paul Shepard

The Mini Digital Power System (MDP) from Seeed Technology Co., Ltd. is a system of programmable linear dc power supplies based on a modular design, capable of connecting different modules for use as needed.

Current functional modules in the MDP system include a digital control module and a digital power module. Modules in develop include a digital signal generator module, electronic load module, power charge module and battery pack module.

Target applications include:

  • Universal tests and teaching experiments in the R&D laboratory.
  • Maintenance of cellphones, laptops and other digital products.
  • Power supply testing and data logger of RF and microwave circuits or modules.
  • Supply purified power for high-accuracy digital-analog hybrid circuits and Hi-Fi audio devices.
  • Property verification and fault diagnosis of devices and circuits.
  • Quality control and quality inspection.
  • Emergency power supply for model airplanes and vehicles.

MDP-XP currently consists of a display control module and a digital power module. Through 2.4G wireless connection, MDP-XP achieves multichannel free combination at the power of 90W per channel. MDP-XP is a high cost-effective programmable linear dc power supply, featuring indicators, stability, reliability and distinct user interface comparable with professional power supplies; it also provides programmable output, timing output, sequential control, automatic compensation, and other powerful functions, so as to meet diversified testing needs.

MDP-M01 Display Control Module: equipped with a 2.8-inch TFT screen, it can display the voltage-current waveform in real-time, support data statistics, and automatically pair with and control six sub-modules (digital power modules), with dual thumb wheels and 90-degree scrolling user-friendly design.

MDP-P905 Digital Power Module: high-efficiency linear output, 0.25mV ripple wave, high-speed (4μS) transient response, and supporting precise fine-tuning.

MDP-XP system is capable of providing the following:

  • Programmable output
  • Timing output
  • Sequential Control
  • Automatic Compensation

The device has been designed with protections like input overvoltage, under-voltage protection, anti-reverse connection protection, anti-backflow protection, overtemperature protection, and over-current protection


  • Input - 4.2- to 30-Vdc (after startup 2.7Vdc), 100mA to 6A, supports QC3.0
  • Output - 30V/5A, 90W
  • Adjustment rate
    • Load adjustment rate <±0.01^%
    • Power adjustment rate <±0.01^%
  • Ripple and noise - 250µVrms/3mVpp
  • Transient response time - ≤4μS
  • Line loss compensation range - 5mR-100mR
  • Data record - Max storage: 7MB, Max recording time: 24 hours.
  • Automatically shuts down and enters the micro-power mode.
  • Supports USB firmware upgrade.
  • Supports user calibration

System Features:

  • 4G wireless connection, supporting a Display Control as well as six Digital Powers.
  • DC wide voltage input between 4.2V and 30V reduced up to 2.7V after startup.
  • High-speed transient response and over current protection, as fast as 4uS.
  • Extremely low load regulation and intelligent line loss compensation.
  • High efficiency and natural heat dissipation with 90W of the capacity load.
  • Support positive & negative pressure, series pressurization, parallel current sharing, free combination of collaborative load, and intelligent power allocation.
  • Security Protections: input overvoltage, under-voltage protection, anti-reverse connection protection, anti-backflow protection, overtemperature protection, and over current protection.