POWER AND LINEAR IC SOLUTIONS

Complete Half-Bridges Suit Motor Control

The new NovalithIC family of devices from Infineon offers complete, low-ohmic, high-current protected half-bridges as single packages. The devices feature up to 25kHz low-side and high-side switching capability and provide overcurrent, overvoltage and overtemperature protection.


NovalithIC Multi-Chip Module

Available with current ratings of 30A, 43A and 68A, NovalithIC range components integrate three separate chips in a single package: one p-channel high-side MOSFET, one n-channel low-side MOSFET and a driver IC. All three chips are mounted on a common leadframe, using chip-on-chip and chip-by-chip technology.

The power switches use vertical MOS technologies to ensure optimum on-state resistance. The provision of a p-channel high-side switch eliminates the need for a charge pump, thus minimising EMI. Interfacing to a microcontroller is made easy by the integrated driver IC which features logic level inputs, slew rate adjustment, dead time generation and protection against overtemperature, overvoltage, undervoltage, overcurrent and short circuit.

All of the devices – the BTS7930B, BTS7960B and BTS7970B – can be combined with other similar devices to form H-bridge and three-phase drive configurations.

An integrated analogue current sense feature is optionally available to monitor load current for easy torque control, reducing system costs.


Application Example for DC Brush Motor

Features

• Integrated 30A, 43A and 68A protected half-bridges
• Integrated high- and low-side driver and controller
• Very low path resistance down to 15mΩ
• Low quiescent current: typically 7µA@25°C
• PWM capability of up to 25kHz with active freewheeling
• Switched mode current limitation for reduced power dissipation in overcurrent
• Status flag diagnosis with current sense capability
• Overtemperature shut down with latch behaviour
• Overvoltage and undervoltage shut down
• Driver circuit with logic level inputs
• Adjustable slew rates for optimised EMI

Applications

• Automation, robotics
• Medical (dentists’ chairs)
• Battery-driven tools
• Automotive applications
  • Central locking
  • Gearbox
  • Seat belt pre-tension
  • Seat control
  • Transfer case
  • Windscreen wipers

For further information, including Product Briefs for the BTS7930B and BTS7960B, please click here