LMG2656数据手册TI中文资料规格书

描述 Description

The LMG2656 is a 650V 230mΩ GaN power-FET half bridge. The LMG2656 simplifies design, reduces component count, and reduces board space by integrating half-bridge power FETs, gate drivers, bootstrap FET, and high-side gate-drive level shifter in a 6mm by 8mm QFN package.

Programmable turn-on slew rates provide EMI and ringing control. The low-side current-sense emulation reduces power dissipation compared to the traditional current-sense resistor and allows the low-side thermal pad to be connected to PCB power ground.

The high-side GaN power FET can be controlled with either the low-side referenced gate-drive pin (INH) or the high-side referenced gate-drive pin (GDH). The high-side gate-drive signal level shifter reliably transmits the INH pin signal to the high-side gate driver in challenging power switching environments. The smart-switched GaN bootstrap FET has no diode forward-voltage drop, avoids overcharging the high-side supply, and has zero reverse-recovery charge.

The LMG2656 supports converter light-load efficiency requirements and burst-mode operation with low quiescent currents and fast start-up times. Protection features include FET turn-on interlock, under-voltage lockout (UVLO), cycle-by-cycle current limit, and over-temperature shut down. Ultra low slew rate setting supports motor drive applications.

特性 Features

650V GaN power-FET half bridge

230mΩ low-side and high-side GaN FETs

Integrated gate drivers with <100ns low propagation delays

Programmable turn-on slew rate control

Current-sense emulation with high-bandwidth and high accuracy

Low-side referenced (INH) and high-side referenced (GDH) high-side gate drive pins

Low-side (INL) / high-side (INH) gate-drive interlock

High-side (INH) gate-drive signal level shifter

Smart-switched bootstrap diode function

High-side start up: <8µs

Low-side / high-side cycle-by-cycle overcurrent protection

Overtemperature protection

AUX idle quiescent current: 250µA

AUX standby quiescent current: 50µA

BST idle quiescent current: 70µA

8mm × 6mm QFN package with dual thermal pads