The A4910 is a three-phase controller that can be used with N-channel external power MOSFETs specifically for automotive applications.
Unique charge pump regulator provides complete (>10 V)Gate driversto handle battery voltages as low as 7 V and allow the A4910 to be usedGate driversOperates when the voltage drops to 5.5 V.
The bootstrap capacitor is used to provide the above battery supply voltage required for the N-channel MOSFET. The high-side drive internal charge pump allows DC (100% duty cycle) operation.
The device provides full control of all six power MOSFETs in a three-phase bridge, allowing the motor to be driven by blocking commutation or sinusoidal excitation. Integrated crossover control and programmable inductive time save power MOSFETs from breakdown.
The current in each half-bridge can be measured using an integrated current-sense amplifier. These are three user-configurable difference amplifiers with ground common-mode range and excellent transient response and settling time, allowing them to be used in low-side current sensing applications.
Integrated diagnostics indicate undervoltage, overtemperature, and power bridging faults, and can be configured to protect the power MOSFETs under most short-circuit conditions. Detailed diagnostics are available in the form of serial data words.
The A4910 is available in a small (81 mm2) 48-pin LQFP package with exposed heat shield (suffix JP). The package is lead (Pb) free and features 100% matte tin leadframe plating.
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- Electronic power steering (EPS, EHPS, EAS)
- Hydraulic pump
- Engine cooling fan
- Transmission actuators
- High-current, three-phase gate drivers for N-channel MOSFETs
- Three-phase current sense amplifier
- SPI is compatible with series or direct parallel control
- Cross-conduction protection
- Programmable insensitive time
- The charge pump provides 100% PWM when fully charged
- Unconstrained buffer amplifier
- 5.5 to 50 V supply voltage range
- CMOS input, 3.3 to 5 V logic supply
- Comprehensive diagnostic output
- Low current sleep mode