Date: 21/11/2009

Efficiency enhancing MOSFET drivers from Analog Devices

The new MOSFET drivers ADP36xx family from Analog Devices offer 2 Amps and 4 Amps peak currents, less propagation delays fast rise and fall times for DC/DC power converters and power control applications.

ADP36xx family perform at a propagation delays of 14 ns to 35 ns (nanoseconds) and edge rise/fall times of 10 ns to 25 ns. The new ADP36xx MOSFET feature overtemperature protection, UVLO (undervoltage lockout), and precision shutdown capabilities. The drivers can complement digital PWM (pulse width modulation) controllers to extend the switching frequency range in isolated power supplys and motor control systems.

These new high-current, high-speed, dual 18-volt drivers can drive two independent N-channel power MOSFETs. The parts have an internal temperature sensor and provide two levels of overtemperature protection are warning and shutdown at junction temperatures. The shutdown function, generated from a precise internal comparator, provides fast system enable or shutdown, allowing redundant overvoltage protection and complementing the protection function of the switching controller. An input voltage range allows the drivers to be compatible with both analog and digital PWM controllers. Digital power controllers are powered by a low voltage supply, while the drivers are powered by a high voltage supply. UVLO and hysteresis functions allow safe startup and shutdown of the higher voltage supply when used with low-voltage digital controllers.

The device families are available in thermally enhanced SOIC_EP (small outline package with exposed pad) and Mini SO_EP (mini small outline package with exposed pad) packaging to maximize high frequency drive capability in a small PCB (printed circuit board) area.

For details visit www.analog.com