LM27222 - 高速 4.5A 同步 MOSFET 驱动器

LM27222是TI德州仪器公司的一款半桥驱动器产品，LM27222是高速 4.5A 同步 MOSFET 驱动器，本站介绍了LM27222的封装应用图解、特点和优点、功能等，并给出了与LM27222相关的TI元器件型号供参考。

LM27222 - 高速 4.5A 同步 MOSFET 驱动器 - 半桥驱动器 - MOSFET和IGBT栅极驱动器 - 德州仪器

产品描述

The LM27222 is a dual N-channel MOSFET driver designed to drive MOSFETs in push-pull configurations as typically used in synchronous buck regulators. The LM27222 takes the PWM output from a controller and provides the proper timing and drive levels to the power stage MOSFETs. Adaptive shoot-through protection prevents damaging and efficiency reducing shoot-through currents, thus ensuring a robust design capable of being used with nearly any MOSFET. The adaptive shoot-through protection circuitry also reduces the dead time down to as low as 10ns, ensuring the highest operating efficiency. The peak sourcing and sinking current for each driver of the LM27222 is about 3A and 4.5Amps respectively with a Vgs of 5V. System performance is also enhanced by keeping propagation delays down to 8ns. Efficiency is once again improved at all load currents by supporting synchronous, non-synchronous, and diode emulation modes through the LEN pin. The minimum output pulse width realized at the output of the MOSFETs is as low as 30ns. This enables high operating frequencies at very high conversion ratios in buck regulator designs. To support low power states in notebook systems, the LM27222 draws only 5µA from the 5V rail when the IN and LEN inputs are low or floating.

产品特性

Adaptive Shoot-through Protection
10ns Dead Time
8ns Propagation Delay
30ns Minimum On-time
0.4? Pull-down and 0.9? Pull-up Drivers
4.5A Peak Driving Current
MOSFET Tolerant Design
5µA Quiescent Current
30V Maximum Input Voltage in Buck Configuration
4V to 6.85V Operating Voltage
SOIC-8 and WSON Packages

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