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LM5045MH/NOPB

Full-Bridge PWM Controller with Integrated MOSFET Drivers

Packaging

Package | PIN: PWP | 28
Temp: Q (-40 to 125)
Carrier: Partial Tube
Qty Price
1-9 $4.63
10-24 $4.16
25-99 $3.89
100-249 $3.49
250-499 $3.25
500-749 $2.83
750-999 $2.45
1000+ $2.40

Features

  • Highest Integration Controller for Small Form
    Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows Linear
    Turnon Into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO mode and
    Hiccup Mode
  • Two Independent, Programmable Synchronous Rectifier
    Dead-Time Adjustments
  • Four High-Current 2-A Bridge Gate Drivers
  • Wide-Bandwidth Optocoupler Interface
  • Configurable for Either Current Mode or Voltage
    Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2-MHz Oscillator
  • Programmable Line UVLO and OVP

Texas Instruments  LM5045MH/NOPB

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.