Full Bridge Gate Driver Ic
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Using a Single-Output Gate-Driver for High-Side or Low-Side Drive Figure 1. Full-Bridge Powerstage With both High-Side and Low-Side Primary MOSFETs To properly turn-on these switches in high-power applications, gate-drive ICs are often required. To properly drive a LS power switch, it is usually simple enough in that the output of the gate driver can be. Allegro MicroSystems has announced a new full-bridge controller for use with N-channel external power MOSFETs that has been specifically designed for.
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.
Graph after running ForceAtlas2Now we can try to partition the nodes into different communities by using their “Modularity” class, computable through the section “statistics” on the right of the screen. Partition nodes by modularity with a resolution of 0.6Now we can assign different colors to each modularity class. Here we can provide a value for the “resolution” parameter: the smaller value, the more partitions (i.e.: more communities).
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 MLX83202 of the same pre-driver family. For sensorless BLDC applications see also our embedded-MCU BLDC controllers MLX812xx family.
Allegro MicroSystems has announced a new full-bridge controller for use with N-channel external power MOSFETs that has been specifically designed for automotive applications. Allegro's A5929 has a unique charge pump regulator that provides full (>10 V) gate drive at battery voltages down to 7 V and allows the device to operate with reduced gate drive at battery voltages down to 5.5 V. A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs.
One logic level input is provided for each of the four power MOSFETs in the full-bridge, allowing motors to be driven with any PWM scheme defined by an external controller. The power MOSFETs are protected from cross-conduction by integrated crossover control. Motor phase short-to-supply and short-to-ground detection is provided by independent drain-source voltage monitors on each MOSFET. Short faults, supply under-voltage, and chip over-temperature conditions are indicated by a single open drain fault output.
The A5929KLPTR-T is supplied in a 24-pin TSSOP power package with an exposed thermal pad (package type LP) for enhanced power dissipation. This package is available in lead (Pb) free versions, with 100% matte-tin lead frame plating (suffix ). It is priced at $1.60 in quantities of 1,000.