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LM5104MX/NOPB +BOM

2-A, 100-V half bridge gate driver with 8-V UVLO and adaptive delay

LM5104MX/NOPB General Description

The LM5104 High-Voltage Gate Driver is designed to drive both the high-side and the low-side N-channel MOSFETs in a synchronous buck configuration. The floating high-side driver can work with supply voltages up to 100 V. The high-side and low-side gate drivers are controlled from a single input. Each change in state is controlled in an adaptive manner to prevent shoot-through issues. In addition to the adaptive transition timing, an additional delay time can be added, proportional to an external setting resistor. An integrated high-voltage diode is provided to charge high-side gate drive bootstrap capacitor. A robust level shifter operates at high speed while consuming low power and providing clean level transitions from the control logic to the high-side gate driver. Undervoltage lockout is provided on both the low-side and the high-side power rails. This device is available in the standard SOIC and the WSON packages.

Key Features

  • Drives Both a High-Side and Low-Side N-Channel MOSFET
  • Adaptive Rising and Falling Edges With Programmable
    Additional Delay
  • Single Input Control
  • Bootstrap Supply Voltage Range up to 118-V DC
  • Fast Turnoff Propagation Delay (25 ns Typical)
  • Drives 1000-pF Loads With 15-ns Rise and Fall Times
  • Supply Rail Undervoltage Lockout
  • SOIC and WSON-10 4-mm × 4-mm Package

Specifications

Bus voltage (max) (V) 100 Power switch MOSFET
Input VCC (min) (V) 9 Input VCC (max) (V) 14
Peak output current (A) 2 Operating temperature range (°C) -40 to 125
Undervoltage lockout (typ) (V) 8 Rating Catalog
Propagation delay time (µs) 0.035 Rise time (ns) 10
Fall time (ns) 10 Iq (mA) 0.01
Input threshold TTL Channel input logic TTL
Negative voltage handling at HS pin (V) -1 Driver configuration Dual, Single

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