You are here

100V High Side/Low Side N-Channel High Speed MOSFET Driver

Linear Technology Corporation announces the LTC4446, a high frequency, high input supply voltage (100V) MOSFET driver designed to drive upper and lower N-Channel power MOSFETs in a 2-transistor forward converter.


This driver, combined with power MOSFETs and one of Linear Technology's DC/DC controllers form a complete high efficiency 2-transistor forward converter or can be configured as a fast acting high voltage DC switch.

This powerful driver can source up to 2.5A with a 1.2 Ohm pull-down impedance for driving the top MOSFET and can source 3A with a 0.55 Ohm pull-down impedance for the synchronous MOSFET, making it ideal for driving high gate capacitance, high current MOSFETs. The LTC4446 can also drive multiple MOSFETs in parallel for higher current applications. The fast 8ns rise time, 5ns fall time of the top MOSFET, and 6ns rise time, 3ns fall time of the bottom MOSFET when driving a 1,000pF load minimize switching losses.

The LTC4446 is configured for two supply-independent inputs. The high-side input logic signal is internally level-shifted to the bootstrap supply, which may function at up to 114V above ground. Furthermore, this part drives both upper and lower MOSFET gates over a range of 7.2V to 13.5V.

 100V High Side/Low Side MOSFET Driver

Summary of Features: LTC4446
High Side/Low Side N-Channel MOSFET Driver
100V Maximum Supply Voltage
Ideal for 2-Transistor Forward Converters
High Voltage Switch Applications
High Drive Current - 3A Source, 0.55Ohm Sink
7.2V to 13.5V Gate Drive Voltage
Top Gate-8ns Rise, 5ns Fall Times when Driving 1,000pF
Bottom Gate-6ns Rise, 3ns Fall Times when Driving
Undervoltage Lockout for Gate Drive Voltage
Thermally Enhanced MSOP-8 Package


Hodnocení článku: