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Product details

Parameters

Bus voltage (Max) (V) 90 Power switch MOSFET Input VCC (Min) (V) 8 Input VCC (Max) (V) 14 Peak output current (A) 1 Rise time (ns) 15 Operating temperature range (C) -40 to 125 Rating Catalog Number of channels (#) 2 Fall time (ns) 15 Prop delay (ns) 25 Iq (uA) 10 Input threshold TTL Channel input logic TTL Negative voltage handling at HS pin (V) -1 Features open-in-new Find other Half-bridge drivers

Package | Pins | Size

SOIC (D) 8 19 mm² 4.9 x 3.9 WSON (NGT) 8 16 mm² 4 x 4 open-in-new Find other Half-bridge drivers

Features

  • Drives Both a High-Side and Low-Side N-Channel MOSFET
  • 1A peak Output Current (1.0A Sink / 1.0A Source)
  • Independent TTL Compatible Inputs
  • Bootstrap Supply Voltage to 108V DC
  • Fast Propagation Times (30 ns Typical)
  • Drives 1000 pF Load with 15ns Rise and Fall Times
  • Excellent Propagation Delay Matching (2 ns Typical)
  • Supply Rail Under-Voltage Lockout
  • Low Power Consumption
  • Pin Compatible with ISL6700
  • Industry Standard SOIC-8 and Thermally Enhanced WSON-8 Package
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Description

The LM5109A is a cost effective, high voltage gate driver designed to drive both the high-side and the low-side N-Channel MOSFETs in a synchronous buck or a half bridge configuration. The floating high-side driver is capable of working with rail voltages up to 90V. The outputs are independently controlled with TTL compatible input thresholds. The robust level shift technology operates at high speed while consuming low power and providing clean level transitions from the control input logic to the high-side gate driver. Under-voltage lockout is provided on both the low-side and the high-side power rails. The device is available in the SOIC and the thermally enhanced WSON packages.

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Technical documentation

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Type Title Date
* Datasheet LM5109A High Voltage 1A Peak Half Bridge Gate Driver datasheet (Rev. C) Sep. 23, 2016
Application notes External Gate Resistor Selection Guide (Rev. A) Feb. 28, 2020
Application notes Understanding Peak IOH and IOL Currents (Rev. A) Feb. 28, 2020
More literature Fundamentals of MOSFET and IGBT Gate Driver Circuits (Replaces SLUP169) (Rev. A) Oct. 29, 2018
Technical articles How to achieve higher system robustness in DC drives, part 3: minimum input pulse Sep. 19, 2018
Technical articles How to achieve higher system robustness in DC drives, part 2: interlock and deadtime May 30, 2018
Technical articles Boosting efficiency for your solar inverter designs May 24, 2018
Application notes AN-1317 Selection of External Bootstrap Diode for LM510X Devices (Rev. B) May 04, 2018
Technical articles How to achieve higher system robustness in DC drives, part 1: negative voltage Apr. 17, 2018
User guides AN-1299 LM5041 Evaluation Board (Rev. A) May 06, 2013
User guides AN-1331 LM5033 Evaluation Board (Rev. A) May 06, 2013

Design & development

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Reference designs

REFERENCE DESIGNS Download
Highly Efficient, Versatile Bi-Directional Power Converter for Energy Storage and DC Home Solutions
TIDA-00476 TIDA-00476 is comprised of a single DC-DC power stage, which can work as a synchronous buck converter or a synchronous boost converter, enabling bidirectional power flow between DC power source and energy storage system. Operating in synchronous buck mode, the system works as a MPPT controlled DC-DC (...)
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CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options
WSON (NGT) 8 View options

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