TPS28225D

产品概述

The TPS28225D is a 8-pin High Frequency Sink Synchronous MOSFET Driver with adaptive dead-time control. This driver is optimized for use in variety of high-current one and multi-phase DC-to-DC converters. This is a solution that provides high efficiency, small size and low EMI emissions. The efficiency is achieved by up to 8.8V gate drive voltage, 14ns adaptive dead-time control, 14ns propagation delays and high-current 2A source and 4A sink drive capability. The 0.4R impedance for the lower gate driver holds the gate of power MOSFET below its threshold and ensures no shoot-through current at high dV/dt phase node transitions. The bootstrap capacitor charged by an internal diode allows use of N-channel MOSFETs in a half-bridge configuration. The TPS28225 features a 3-state PWM input compatible with all multi-phase controllers employing 3-state output feature. As long as the input stays within 3-state window for the 250-ns hold-off time, the driver switches both outputs low.

• Drives two N-channel MOSFETs with 14ns adaptive dead time
• Wide Power system train input voltage (3 up to 27V)
• Wide input PWM signals (2.0 up to 13.2V amplitude)
• Capable to drive MOSFETs with >=40A current per phase
• High frequency operation (14ns propagation delay and 10ns rise/fall time allow FSW 2MHz)
• Capable to propagate <30ns input PWM pulses
• Low-side driver sink on-resistance (0.4R) prevents dV/dT related shoot-through current
• 3-state PWM input for power stage shutdown
• Space saving enable (input) and power good (output) signals on same pin
• Thermal shutdown

• UVLO protection
• Internal bootstrap diode
• Green product and no Sb/Br

应用

电源管理, 计算机和计算机周边, 便携式器材