TAA3033 Active Precharge Controller IC

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The TAA3033 is an active precharge controller IC designed for automotive and industrial applications, including HEVs, BEVs, and ESS. It actively regulates the current to safely pre-charge the DC-link capacitor in xEV traction inverters.

Integrated into the battery management system (BMS), it is typically controlled by the battery junction box (BJB) or battery disconnect unit (BDU).

Operating as a cost-efficient and programmable buck converter, the TAA3033 only requires a few small external components. It eliminates the need for a large power resistor and additional thermal management, simplifying design and reducing system cost and size.

Block Diagram

TAA3033

TAA3033 Block Diagram
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Features

Application Features

  • AEC-Q100 grade 1 qualified: −40 °C to +125 °C ambient temperature range
  • Wide supply voltage ranges from 11 V up to 36 V
  • Supports low-side and high-side operation
  • Suitable to drive Si and SiC power MOSFETs
  • I²C interface for configuration of control parameters
  • Enable input for start of precharge cycle
  • Ready output for end of precharge cycle
  • Fault output for triggered protections against switching and connection failures
  • Small outline SO14 package

Control Features

  • Regulated precharge current with continuous conduction mode (CCM) control
  • Peak current and ripple adjustable by internal comparator level and external sense resistor
  • Duty cycle operation with a very wide range from 0.1 % up to 99.9 %
  • Start of precharge with a low duty cycle to prevent current run-away
  • End of precharge by operation with maximum duty cycle

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