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Texas Instruments LM251772 36V 4-Switch Buck-Boost Controller

Texas Instruments LM251772 36V 4-Switch Buck-Boost Controller features a regulated output voltage if the input voltage is higher, equal to, or lower than the adjusted output voltage. The TI LM251772 supports high efficiency in power save mode over the entire operation range of the output. The integrated I2C interface allows dynamic output voltage and average current programming. The output voltage and average current configuration range meet the USBPD standard requirements. The integrated DRV pin can control a disconnect FET to support dual-role port (DRP) requirements.

Features

  • Input range from 3.5V to 36V
  • Dynamical Vo programming via I2C from:
    • 3.3V up to 48V in 20mV steps
    • 1V up to 24V in 10mV steps
  • Peak current regulation control
  • Small voltage transition ripple overall operating modes
  • Shut down quiescent current 3μA
  • Operating quiescent current 60μA
  • Drive (DRV) pin for dual role port power path
    • Push-Pull output for fast pMOS FET control
    • Configurable as charge pump driver stage for nMOS FET
  • Operation mode selection for high efficiency in light load and high load conditions:
    • Power save mode (Single Pulse/μSleep)
    • Automatic conduction mode
  • Integrated high voltage supply LDO
  • Auxiliary high voltage LDO for PD-controller supply
  • Integrated full-bridge gate drive
    • 2A peak current capability
    • Bootstrap over and under-voltage protection
    • Integrated bootstrap diode
  • Fixed frequency independent from operating mode (boost, buck-boost, buck)
    • Forced PWM mode selectable
    • Switching frequency from 100kHz to 600kHz
    • External clock synchronization and clock output
  • Average input or output current sensor
    • Programmable from 0.5A to 7A in 50mA steps
    • ISET pin selectable
  • I2C Interface readout of monitoring features
  • Commercial temperature range (Tj = 0°C to +70°C)
  • Create a custom design using the LM251772 with the WEBENCH® Power Designer

Applications

  • USB Type-C™ power delivery sourcing:
    • Docking station
    • PC-monitor
    • Industrial PC/ rugged PC
    • USB AC/DC adapter
  • Wireless charging
Chart - Texas Instruments LM251772 36V 4-Switch Buck-Boost Controller

Typical Application Schematic

Schematic - Texas Instruments LM251772 36V 4-Switch Buck-Boost Controller

Added RCM

Texas Instruments LM251772 Evaluation Module

Demonstrates a flexible high-power buck-boost design using the LM251772 controller.

Learn Moreo Texas Instruments LM251772 Evaluation Module View Productspowiązany z Texas Instruments LM251772 Evaluation Module
Opublikowano: 2025-01-07 | Zaktualizowano: 2025-07-17