A4957: Full Bridge MOSFET Driver The A4957 is a full-bridge controller for use with external N-channel power MOSFETs and is specifically designed for applications with high-power inductive loads such as brush DC motors. Microchip Technology MIC4606 85V Full Bridge MOSFET Drivers offer adaptive dead time and shoot-through protection. MIC4606's adaptive dead-time circuitry constantly monitors both sides of the full-bridge. This design minimizes the time between high-side and low-side MOSFET transitions, which in turn maximizes power efficiency.
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The MLX83100 is a two-phase pre-driver (also called bridge driver or gate driver) IC with integrated current sense amplifier. This device is used to drive brushed DC motors in combination with a microcontroller and four discrete power N-FETs.
This device is able to control four external N-FETs for full H-bridge control 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.
The 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 500 nC per FET at 20 kHz PWM. Our MLX83100 pre-driver comprises various monitoring and protection functions, including undervoltage and overvoltage detection at multiple internal voltage nodes, over temperature 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, where the duty cycle indicates the nature of the error. An integrated fast, high-bandwidth, low offset current sense amplifier allows for precise torque control, with programmable gain selection.
The MLX83100 provides an EEPROM for configurability, avoiding the need for a high pin-count package. The configuration allows the customer to optimize the pre-driver’s operation for different applications. For brushless (BL)DC applications see also the of the same pre-driver family. For sensorless BLDC applications see also our embedded-MCU BLDC controllers MLX812xx family.
Product Details The LT1160/LT1162 are cost effective half-/full-bridge N-channel power MOSFET drivers. The floating driver can drive the topside N-channel power MOSFETs operating off a high voltage (HV) rail of up to 60V. The internal logic prevents the inputs from turning on the power MOSFETs in a half-bridge at the same time. Its unique adaptive protection against shoot-through currents eliminates all matching requirements for the two MOSFETs.
This greatly eases the design of high efficiency motor control and switching regulator systems. During low supply or start-up conditions, the undervoltage lockout actively pulls the driver outputs low to prevent the power MOSFETs from being partially turned on. The 0.5V hysteresis allows reliable operation even with slowly varying supplies. The LT1162 is a dual version of the LT1160 and is available in a 24-pin PDIP or in a 24-pin SO Wide package. Applications • PWM of High Current Inductive Loads • Half-Bridge and Full-Bridge Motor Control • Synchronous Step-Down Switching Regulators • 3-Phase Brushless Motor Drive • High Current Transducer Drivers • Class D Power Amplifiers.
LTspice LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits. To launch ready-to-run LTspice demonstration circuits for this part: Step 1: Download and install LTspice on your computer. Step 2: Click on the link in the section below to download a demonstration circuit. Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu. Status Status indicates the current lifecycle of the product. This can be one of 4 stages: • Pre-Release: The model has not been released to general production, but samples may be available. • Production: The model is currently being produced, and generally available for purchase and sampling.