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Reference DesignMicrochip

HV9901 Universal Relay Driver Reference Design User's Guide

A user's guide for the HV9901 Universal Relay Driver Reference Design, featuring energy monitoring and USB connectivity for universal relay control applications.

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Overview

The HV9901 Universal Relay Driver Reference Design provides a comprehensive solution for driving various relays from high-voltage AC or DC sources. The design utilizes the HV9901 PWM controller to manage relay coil current, which significantly reduces power consumption and heat dissipation compared to traditional linear drivers. The board integrates several Microchip components, including the MCP2221 USB-to-UART/I2C bridge for PC communication, the MCP39F511A power monitoring IC for real-time energy measurement, the MCP9701 for temperature sensing, and the MCP1754ST LDO for stable 3.3V power delivery. This reference design serves as an evaluation platform for efficient relay control, monitoring, and thermal management in industrial and home automation systems.

Use Cases

  • Industrial control systems
  • Home automation
  • Energy-efficient relay driving
  • Power monitoring applications
  • Universal AC/DC relay interfaces

Topics

Microchip
HV9901
Universal Relay Driver
Reference Design
MCP2221
MCP39F511A
MCP9701
MCP1754ST
Energy Monitoring
PWM Relay Driver
Relay Control
Schematic

Referenced Parts

MCP9701

Microchip

The MCP9701 analog temperature sensor with Linear Active Thermistor Integrated Circuit (IC) converts temperature to analog voltage.

CGJ3E2X7R1E103K

TDK

2 C17, C20 Multilayer Ceramic Capacitors MLCC - | SMD/SMT RECOMMENDED ALT 810- | CGJ3E2X7R1E103K | TDK | Corporation

HV9901

Microchip

The HV9901 universal relay driver provides high-efficiency driving for low-voltage relays with supply voltages as high as 450V.

MCP1754ST-3302E

Microchip

1.2.5 MCP1754ST-3302E Device Overview

MCP2221

Microchip

The MCP2221 is a USB-to-UART/I2C serial converter that enables USB connectivity between applications that have a UART and I2C interfaces.

MCP39F511A

Microchip

The MCP39F511A device is a highly-integrated, complete single-phase power-monitoring IC designed for real-time measurement of input power for AC or DC power supplies

S14K275E2K1

TDK

EPCOS/TDK S14K275E2K1

AC0603FR-072R49L

Yageo

Yageo AC0603FR-072R49L

AC2512FK-7W120RL

Yageo

1 R37 120 Ohms 2512 2W 1% Yageo AC2512FK-7W120RL

AC2512FK-7W1ML

Yageo

1 R30 1 MOhms 2512 2W 1% Yageo AC2512FK-7W1ML

AF0603JR-07100RL

Yageo

Yageo AF0603JR-07100RL

RC0603FR-10180KL

Yageo

Yageo RC0603FR-10180KL

RC0805FR-0739RL

Yageo

Yageo RC0805FR-0739RL