Part Number: C-MH-18-790A-CM

Function: DC Motor controller / No IR Module Required

Manufacturer: Electrol

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Description

C-MH-18-790A-CM is a DC motor controller designed for multiple horsepower applications, supporting dual voltage operation with a 12A continuous current rating when properly heat-sinked. It incorporates SCR-based control, soft-start functionality, and precise speed regulation with adjustable parameters for torque, acceleration, and speed range. This controller is typically used with DC motors and gearmotors in industrial and commercial motion control systems.

Features

• Dual voltage operation for 90V and 180V DC motor applications
• 12A continuous current rating with appropriate heat sinking
• 2% base speed regulation with line voltage compensation
• Wide 50:1 speed range with constant torque capability
• Soft-start circuitry for reduced mechanical stress
• Integrated transient and surge protection
• SCR-based discrete power components for improved heat dissipation
• Power ON/OFF switch and status indication (enclosed models)
• Includes 5kΩ, 5W speed control potentiometer
• Flexible connection via screw terminal or plug-in terminal options

Design Notes

• External heat sink is required for high horsepower applications to maintain thermal stability
• Proper adjustment of IR compensation is critical for maintaining constant speed under varying loads
• Ensure adequate ventilation when used in enclosed systems
• Line voltage compensation helps maintain stable motor performance under supply variations
• Use proper fuse protection and wiring practices for safety compliance

Typical Circuit Usage

• DC motor speed control systems
• Industrial conveyor and material handling equipment
• Gearmotor-driven automation systems
• Variable speed drives in machinery

How to Choose This Part

• Select based on required motor voltage (90V or 180V DC)
• Ensure current rating matches motor load requirements
• Consider thermal management for continuous high-load operation
• Suitable for applications requiring wide speed control range with stable torque

Applications

• Industrial motor control systems
• Packaging and processing machinery
• Automation and motion control equipment
• Commercial motor-driven devices

Alternative / Equivalent Products

• KB Electronics KBIC series
• Minarik MM series DC drives
• Dart Controls 125 series
• MC-60 motor controller

Reference World_Class_790A PDF :

Other data sheets are available within the file: CMH18790CM, CMH-18-790A-CM, C-MH-XB-790A-E

C-MH-18-790A-CM Datasheet PDF Download

Part Number: LM5045

Function: Full-Bridge PWM Controller with Integrated MOSFET Driver

Package: 28 HTSSOP / 28 WQFN Type

Manufacturer: Texas Instruments

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Description

The LM5045 PWM controller contains all of the features necessary to implement Full-Bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated dc-dc converter with input voltage up to 100V.

This highly integrated controller-driver provides dual 2A high and low side gate drivers for the four external brige MOSFETs plus control signals for the secondary side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent startup of the synchronous rectifiers allows monotonic turn-on of the power converter even with pre-bias load conditions.

Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start and a 2 MHz capable oscillator with synchronization capability and thermal shutdown.

Pinouts

Features

• Full-bridge PWM controller for isolated DC-DC converters
• Supports both current-mode and voltage-mode control
• Integrated four 2A gate drivers for primary-side MOSFETs
• Control outputs for secondary-side synchronous rectifiers
• Wide input operation up to 100V
• High-frequency operation up to 2 MHz with synchronization capability
• Programmable soft-start and synchronous rectifier soft-start
• Cycle-by-cycle current limiting
• Hiccup mode fault protection for overload conditions
• Thermal shutdown protection
• Integrated high-voltage startup regulator

Design Notes

• Full-bridge topology enables efficient power conversion at higher power levels (>100W typical)
• Dead-time programming is critical to prevent shoot-through in MOSFETs
• Synchronous rectification significantly improves efficiency in low-voltage outputs
• Current-mode control simplifies loop compensation and provides inherent overcurrent protection
• Transformer design (turns ratio, leakage inductance) is key for efficiency and EMI
• Layout must minimize high di/dt loop areas (primary switching loop and gate drive loop)
• Proper snubber or clamp circuits may be required to handle voltage spikes

Typical Applications

• Isolated DC-DC converters (industrial power supplies)
• Telecom and server power systems
• High-density power modules
• Battery-powered high-power systems
• Electric vehicle auxiliary power supplies

Advantages

• High level of integration reduces BOM and design complexity
• Supports advanced topologies (full-bridge + synchronous rectification)
• Robust protection features improve system reliability
• Flexible control (current-mode / voltage-mode)
• Suitable for high-efficiency, high-density designs

Alternative / Equivalent Products

• UCC28950 – Phase-shifted full-bridge controller (TI)
• UC3825 – PWM controller for bridge topologies
• NCP1397 – ON Semiconductor resonant controller
• ICE2HS01G – Infineon half/full-bridge controller
• SG3525 – Classic PWM controller (less integrated)

Other data sheets are available within the file:

LM5045MH, LM5045MH/NOPB, LM5045MHX, LM5045MHX/NOPB

LM5045 Datasheet PDF Download