Analog: Motor Driver
Microchip has more than 20 years' experience with driver ICs for automotive motors. We supply products at a high-volume for a variety of common body electronic applications, including mirror control and flap control in HVACs. They all share the same protection features – short-circuit protection, temperature warning and switch off, low voltage protection, and open load detection – all of which are a must for automotive electronics.
Features and Benefits
The Microchip driver family includes a wide variety of integrated half bridge output stages, enabling designers to easily tailor solutions to their needs.
Our driver portfolio includes ICs for small DC motors controlled directly from the output stages. At the heart of the Microchip, the portfolio is motor driver system basis chips, with integrated gate drivers or pre-drivers to control separate NMOSFETs. These drivers can be used to control almost any size of NMOSFETs, for use in a broad range of applications.
With few external components, the Microchip driver ICs with LIN communication and the Microchip microcontrollers combine to create cost-efficient motor driver modules, complete with LIN functionality for harsh automotive conditions.
The Microchip motor driver family targets applications with stepper motors, brushed and brushless DC motors for standard temperature applications, as well as demanding high-temperature "under-the-hood" applications.
Stepper and Brushed DC Motor Drivers
Microchip offers dual full-bridge motor drivers to drive bipolar stepper motors or bidirectional control of two DC motors. The wide operating voltage range and easy to design with microcontrollers (MCU) allow customer to quickly adopt them into applications, such as security camera, ticketing system, home appliances, etc.
Microchip also offers full-bridge motor gate drivers to drive brushed DC motors in automotive body and powertrain applications.
- Load voltage supply range: 10V to 40V
- Output current up to 750 mA (each bridge)
- Internal fixed Toff time PWM current control
- Built-in protection diodes
- Internal thermal shutdown
- Under-voltage lockout
- LS-TTL compatible logic inputs with pull-up resistors
- Low RON output resistance
- Low quiescent current
- PWM and direction controlled driving of four externally powered NMOS transistors
- Programmable dead time for avoiding cross conduction during switching
- Integrated Charge Pump to provide gate voltages for high-side drivers to supply the gate of the external battery reverse protection NMOS
- 5V / 3.3V regulator and current limitation function
- Sleep mode with a supply current of typically <45µA
- Programmable window watchdog
- Battery overvoltage protection and under voltage management
- Overtemperature warning and protection
- LIN 2.1 compliant
3-Phase Motor Drivers
Microchip offers a family of three-phase brushless motor drivers and gate drivers.
The family of three-phase brushless sensorless sinusoidal motor drivers can be interfaced with any microcontrollers by using a simple PWM, or can also be used stand-alone by the application.
The family of three-phase brushless gate drivers is ideal to be designed with microcontrollers or digital signal controllers.
- Sensorless three-phase brushless motor drivers (no hall-effect sensor required)
- 180° sinusoidal drive, for high efficiency and low acoustic noise
- Speed control through power supply modulation (PSM) and/or pulse-width modulation (PWM)
- Direction control pin (MTD6502B and MTD6505)
- Resistor programmable BEMF coefficient (MTD6505)
- Motor speed output (FG)
- Lockup protection and automatic recovery
- Over-current Limit, short circuit, and over-temperature protection
- Three half-bridge drivers configured to drive external NMOS MOSFETs
- Shoot-through protection
- Overcurrent and short circuit protection
- Adjustable output buck regulator
- Operational amplifiers for motor phase current monitoring and position detection
- Overcurrent Comparator
- Level Translators
- UVLO; OVLO; thermal warning and shutdown
- Load dump protection, Jumpstart capability
- Extended Temperature Range: -40 to +150°C
Multi-channel Half-Bridge Drivers
Microchip multi-channel half bridge drivers support brushed DC motors in automotive and industrial applications. They are designed to support three to six independent driver stages and currents up to 1A each half bridge output. The control and diagnosis interface is a 16-Bit SPI.
The devices are designed in BCD-on-SOI architecture, combining high-voltage capability with the benefits of rugged SOI technology: high-temperature resistance, excellent radiation hardness, very low leakage currents, low parasitic and latch-up immunity.
- Supply and operation up to 40V
- RDSon maximum 1,5Ohm - 1.8Ohm
- Up to 650mA - 1A load current
- 3 or 6 half-bridge outputs
- Capable of switching all kinds of loads such as DC motors, bulbs, resistors, capacitors and inductors
- PWM capability up to 25kHz for each half bridge output controlled by external PWM signal (ATA6831C, 32C)
- No shoot-through current
- Very low quiescent current <2µA in Standby Mode versus total temperature range
- Outputs short circuit protected
- Overtemperature prewarning and protection for each output stage
- Selective thermal shutdown for every single output stage (ATA6831C, ATA6832C)
- Maximum junction temperature up to 200°C (ATA6832C)
- Undervoltage protection
- Various diagnostic functions such as shorted out, open-load, overtemperature and power-supply fail detection
- SPI interface, daisy chain capable
3-Phase Brushless Motor Drivers
Microchip offers a family of three-phase brushless motor drivers and gate drivers.
The family of three-phase brushless sensorless sinusoidal motor drivers can be interfaced witMicrochip offers a family of three-phase brushless motor drivers and gate drivers.
The family of three-phase brushless sensorless sinusoidal motor drivers can be interfaced with any microcontrollers by using a simple PWM, or can also be used stand-alone by the application.
The family of three-phase brushless gate drivers is ideal to be designed with microcontrollers or digital signal controllers.
- Sensorless three-phase brushless motor drivers (no hall-effect sensor required)
- 180° sinusoidal drive, for high efficiency and low acoustic noise
- Speed control through power supply modulation (PSM) and/or pulse-width modulation (PWM)
- Direction control pin (MTD6502B and MTD6505)
- Resistor programmable BEMF coefficient (MTD6505)
- Motor speed output (FG)
- Lockup protection and automatic recovery
- Over-current Limit, short circuit, and over-temperature protection
- Three half-bridge drivers configured to drive external NMOS MOSFETs
- Shoot-through protection
- Overcurrent and short circuit protection
- Adjustable output buck regulator
- Operational amplifiers for motor phase current monitoring and position detection
- Overcurrent Comparator
- Level Translators
- UVLO; OVLO; thermal warning and shutdown
- Load dump protection
- Extended Temperature Range: -40 to +150°C
Full-Bridge Drivers
Microchip offers dual full-bridge motor drivers to drive bipolar stepper motors, or bidirectional control of two DC motors. The wide operating voltage range and easy to design with microcontrollers (MCU) allows customer to quickly adopt them into applications, such as security camera, ticketing system, home appliances, etc.
- Load voltage supply range: 10V to 40V
- Output current up to 750 mA (each bridge)
- Internal fixed Toff time PWM current control
- Built-in protection diodes
- Internal thermal shutdown
- Under-voltage lockout
- LS-TTL compatible logic inputs with pull-up resistors
- Low RON output resistance
- Low quiescent current
