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LMG1205

ACTIVE

1.2-A, 5-A 90-V, half bridge gate driver with 5-V UVLO for GaNFET and MOSFET

Product details

Power switch GaNFET, MOSFET Input VCC (min) (V) 4.5 Input VCC (max) (V) 5.5 Peak output current (A) 5 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 4 Rating Catalog Propagation delay time (µs) 0.035 Rise time (ns) 7 Fall time (ns) 3.5 Iq (mA) 0.09 Input threshold TTL Channel input logic TTL Negative voltage handling at HS pin (V) -5 Features Bootstrap supply voltage clamp, Split outputs on high and low side Driver configuration Half bridge
Power switch GaNFET, MOSFET Input VCC (min) (V) 4.5 Input VCC (max) (V) 5.5 Peak output current (A) 5 Operating temperature range (°C) -40 to 125 Undervoltage lockout (typ) (V) 4 Rating Catalog Propagation delay time (µs) 0.035 Rise time (ns) 7 Fall time (ns) 3.5 Iq (mA) 0.09 Input threshold TTL Channel input logic TTL Negative voltage handling at HS pin (V) -5 Features Bootstrap supply voltage clamp, Split outputs on high and low side Driver configuration Half bridge
DSBGA (YFX) 12 3.24 mm² 1.8 x 1.8
  • Independent high-side and low-side TTL logic inputs
  • 1.2-A peak source, 5-A sink current
  • High-side floating bias voltage rail operates up to 100 VDC
  • Internal bootstrap supply voltage clamping
  • Split outputs for adjustable turnon, turnoff strength
  • 0.6-Ω pulldown, 2.1-Ω pullup resistance
  • Fast propagation times (35 ns typical)
  • Excellent propagation delay matching (1.5 ns typical)
  • Supply rail undervoltage lockout
  • Low power consumption
  • Independent high-side and low-side TTL logic inputs
  • 1.2-A peak source, 5-A sink current
  • High-side floating bias voltage rail operates up to 100 VDC
  • Internal bootstrap supply voltage clamping
  • Split outputs for adjustable turnon, turnoff strength
  • 0.6-Ω pulldown, 2.1-Ω pullup resistance
  • Fast propagation times (35 ns typical)
  • Excellent propagation delay matching (1.5 ns typical)
  • Supply rail undervoltage lockout
  • Low power consumption

The LMG1205 is designed to drive both the high-side and the low-side enhancement mode Gallium Nitride (GaN) FETs in a synchronous buck, boost, or half-bridge configuration. The device has an integrated 100-V bootstrap diode and independent inputs for the high-side and low-side outputs for maximum control flexibility. The high-side bias voltage is generated using a bootstrap technique and is internally clamped at 5 V, which prevents the gate voltage from exceeding the maximum gate-source voltage rating of enhancement mode GaN FETs. The inputs of the LMG1205 are TTL logic compatible and can withstand input voltages up to 14 V regardless of the VDD voltage. The LMG1205 has split-gate outputs, providing flexibility to adjust the turnon and turnoff strength independently.

In addition, the strong sink capability of the LMG1205 maintains the gate in the low state, preventing unintended turnon during switching. The LMG1205 can operate up to several MHz. The LMG1205 is available in a 12-pin DSBGA package that offers a compact footprint and minimized package inductance.

The LMG1205 is designed to drive both the high-side and the low-side enhancement mode Gallium Nitride (GaN) FETs in a synchronous buck, boost, or half-bridge configuration. The device has an integrated 100-V bootstrap diode and independent inputs for the high-side and low-side outputs for maximum control flexibility. The high-side bias voltage is generated using a bootstrap technique and is internally clamped at 5 V, which prevents the gate voltage from exceeding the maximum gate-source voltage rating of enhancement mode GaN FETs. The inputs of the LMG1205 are TTL logic compatible and can withstand input voltages up to 14 V regardless of the VDD voltage. The LMG1205 has split-gate outputs, providing flexibility to adjust the turnon and turnoff strength independently.

In addition, the strong sink capability of the LMG1205 maintains the gate in the low state, preventing unintended turnon during switching. The LMG1205 can operate up to several MHz. The LMG1205 is available in a 12-pin DSBGA package that offers a compact footprint and minimized package inductance.

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LMG1210 ACTIVE 1.5-A, 3-A, 200-V half bridge gate driver, 5-V UVLO and programmable dead-time for GaNFET and MOSFET This product offers superior switching performance (10-ns prop delay, 1-ns delay matching), resistor-programmable deadtime, an internal LDO, and 300-V/ns CMTI.

Technical documentation

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Type Title Date
* Data sheet LMG1205 100-V, 1.2-A to 5-A, Half Bridge GaN Driver with Integrated Bootstrap Diode datasheet (Rev. B) PDF | HTML 14 Apr 2023
Application note Implementing Bootstrap Overcharge Prevention in GaN Half-bridge Circuits PDF | HTML 15 Nov 2023
Application brief Key Parameters and Driving Requirements of GaN FETs PDF | HTML 04 Aug 2022
Application brief Nomenclature, Types, and Structure of GaN Transistors PDF | HTML 04 Aug 2022
Application brief How GaN Enables More Efficient and Reduced Form Factor Power Supplies PDF | HTML 02 Aug 2022
Application brief External Gate Resistor Selection Guide (Rev. A) 28 Feb 2020
Application brief Understanding Peak IOH and IOL Currents (Rev. A) 28 Feb 2020
White paper Optimizing multi-megahertz GaN driver design white paper (Rev. A) 27 Nov 2018
EVM User's guide Using the LMG1205HBEVM 22 Mar 2017

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMG1205HBEVM — LMG1205 GaN Power Stage Evaluation Module

80-V 10A Power Stage EVM - The LMG1205 half-bridge EVM board is a small, easy to use, power stage with an external PWM signal. The EVM is suitable for evaluating the performance of the LMG1205 driving a GaN half-bridge in many different DC-DC converter topologies. It can be used to estimate the (...)

User guide: PDF
Not available on TI.com
Simulation model

LMG1205 PSpice Transient Model (Rev. A)

SNOM624A.ZIP (35 KB) - PSpice Model
Simulation model

LMG1205 TINA-TI Reference Design (Rev. A)

SNOM622A.TSC (131 KB) - TINA-TI Reference Design
Simulation model

LMG1205 TINA-TI Transient Spice Model (Rev. A)

SNOM621A.ZIP (9 KB) - TINA-TI Spice Model
Calculation tool

SNOR034 LMG1205 Component Design Calculator and Schematic Review

Supported products & hardware

Supported products & hardware

Products
Half-bridge drivers
LMG1205 1.2-A, 5-A 90-V, half bridge gate driver with 5-V UVLO for GaNFET and MOSFET
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins Download
DSBGA (YFX) 12 View options

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