High-Side N-Channel FET Driver

Texas Instruments recently introduced the a single-chip, 100-V, high-side FET driver for high-power lithium-ion battery applications. Offering advanced power protection and control, the bq76200 high-voltage solution drives high-side N-channel charge and discharge FETs in batteries commonly used in energy storage systems and motor-driven applications (e.g., drones, power tools, e-bikes, and more). TexInst bq76200

Compared to 50-V low-side FET driver solutions, the 100-V high-side FET driver provides increased protection against possible inductive transient events in motor-driven applications. It also helps maintain constant battery monitoring and enhanced system diagnostics.

Key features and benefits:

  • Versatile supply voltage range: Compatible with a variety of battery architectures, capacities and voltage ranges from 8 to 75 V, with an absolute maximum of 100 V.
  • Advanced-protection FET control: The fast-switching feature minimizes fault response time and disables the discharge FET if a battery has been severely discharged.
  • Quick development time and reduced overhead: The adaptable driver works with small to large power FET arrays by simply scaling the charge-pump capacitor, reducing engineering overhead and speeding development time.
  • High integration and small package size: The bq76200 integrates a high-voltage charge pump and dual FET drivers into one 5 mm × 4.4 mm × 1 mm thin shrink small outline package (TSSOP).

The bq76200 can be used in conjunction with the bq76940 battery-monitoring family, allowing for the application to move to a high-side FET drive and ensure that communication is always possible. The bq76200 can also drive Texas Instrument’s CSD19531Q5A 100-V NexFET power MOSFET as in the bq76200 evaluation module.

The bq76200 is available now. The driver (six-pin TSSOP) costs $1.69 in 1,000-unit quantities.

Source: Texas Instruments