Automotive high power 3-phase brushless BLDC B6 pre-driver
MLX83203 Melexis
The MLX83203 is a three-phase pre-drivers (also called bridge driver or gate driver) IC with integrated current sense amplifier. The devices are used to drive brushless DC motors in combination with a microcontroller and six discrete power N-FETs. Ideal for high-power applications, the MLX83203 provides a gate drive strength of 1A.
For DC applications the MLX83100 pre-driver is available. For sensorless BLDC applications see also our MLX8120x embedded-MCU BLDC controllers family.
Top features
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Optional charge pump for low supply voltage operation
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Alternative charge pump configuration provides NFET reverse polarity drive
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Compatible with 3 V and 5 V microcontrollers
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Converts 6 (or 3) PWM inputs from a microcontroller to drive 6 external N-FETs
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Low offset, low drift, fast current sense amplifier
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Fault interrupt and feedback to microcontroller
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Under and overvoltage protection
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Overtemperature protection
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VDS and VGS external FET monitoring
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Very small footprint: QFN32 5x5mm (25mm2)
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Extensive configurability in EEPROM: Programmable dead time: 0 to 6us, programmable gain: 8 to 48, hardware protection settings (auto-shutdown), diagnostics settings (VDS level, masking time, ...), charge pump configuration
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Automotive qualified: Wide supply voltage operating range: [4.5, 28]V, 45V load dump, 2000Hrs HTOL 150C, Sleep mode with low quiescent current (<30uA)
Automotive high power 3-phase brushless BLDC B6 pre-driver - MLX83203
Product description
The MLX83203 is a three-phase pre-drivers (also called bridge driver or gate driver) IC with integrated current sense amplifier. The devices are used to drive brushless DC motors in combination with a microcontroller and six discrete power N-FETs. Ideal for high-power applications, the MLX83203 provides a gate drive strength of 1A.
The pre-driver is able to drive six external N-FETs in the supply range from 4.5 volt to 28 volt by means of the integrated charge pump. The high-side gate drivers are supplied via bootstrap circuits. A trickle charge pump allows 100% pulse width modulation (PWM) operation despite the use of bootstrap capacitors. The bootstrap voltage regulator is optimized for gate charges up to 350 nC per FET at 20 kHz PWM.
The MLX83203 comprise various monitoring and protection functions, including under-voltage and over-voltage detection at multiple internal voltage nodes, overtemperature detection, and drain-source and gate-source voltage monitoring of the external N-FETs. In case of fault detection, the serial ICOM diagnostics interface will inform the microcontroller with a PWM signal, whose duty cycle indicates the nature of the error.
An integrated programmable gain, current sense amplifier with high bandwidth and low offset allows for precise torque control. The MLX83203 include an EEPROM for configurability, avoiding the need for a high pin-count package. The configuration allows the customer to optimize the pre-driver operation for different applications.
For DC applications the MLX83100 pre-driver is available. For sensorless BLDC applications see also our MLX8120x embedded-MCU BLDC controllers family.
Features and benefits
-
Optional charge pump for low supply voltage operation
-
Alternative charge pump configuration provides NFET reverse polarity drive
-
Compatible with 3 V and 5 V microcontrollers
-
Converts 6 (or 3) PWM inputs from a microcontroller to drive 6 external N-FETs
-
Low offset, low drift, fast current sense amplifier
-
Fault interrupt and feedback to microcontroller
-
Under and overvoltage protection
-
Overtemperature protection
-
VDS and VGS external FET monitoring
-
Very small footprint: QFN32 5x5mm (25mm2)
-
Extensive configurability in EEPROM: Programmable dead time: 0 to 6us, programmable gain: 8 to 48, hardware protection settings (auto-shutdown), diagnostics settings (VDS level, masking time, ...), charge pump configuration
-
Automotive qualified: Wide supply voltage operating range: [4.5, 28]V, 45V load dump, 2000Hrs HTOL 150C, Sleep mode with low quiescent current (<30uA)
