Mosfet High Side Driver Charge Pump

An internal micropower regulator and charge pump generate the high side drive output voltage while requiring no external components.

Mosfet high side driver charge pump.

The circuit presented above utilizes the advantages of the boot strap and charge pump technique providing excellent switch ing speed and steady state operation allowing the use of an n channel mos gated power device as a high side switch. For slower turn on times simply. Its internal charge pump fully enhances an external n channel mosfet switch enabling it to remain on indefinitely. The max1614 uses an internal monolithic charge pump and low dropout linear regulator to supply the required 8v vgs voltage to fully enhance an n channel mosfet high side switch figure 1.

The mic5021 high side mosfet driver is designed to operate at frequencies up to 100 khz 5 khz pwm for 2 to 100 duty cycle and is an ideal choice for high speed applications such as motor control smps switch mode power supplies and applications using igbts. The device consumes a low 77µa of. Its powerful driver can easily drive large gate capacitances with very short transition times making it. The ltc7001 s powerful 1ω ga.

The tle7183qu is designed for a 12 v power net. Norwood ma analog devices inc which recently acquired linear technology corporation announces the ltc7001 a high speed high side n channel mosfet driver that operates up to a 150v supply voltage. The mic5019 operates from a 2 7v to 9v supply and generates gate voltages of 9 2v from a 3v supply and 16v from a 9v supply. The mic5019 is a high side mosfet driver with integrated charge pump designed to switch an n channel enhancement type mosfet control signal in high side or low side applications.

The ltc 7001 is a fast high side n channel mosfet gate driver that operates from input voltages up to 135v. The max1614 also features a 1 5 accurate low battery comparator that can be used to indicate a low battery condition provide an early power fail warning to the system microprocessor or disconnect the battery. The charge pump typically supplies 30μa charging 800pf of gate capacitance in 400μs vbatt 15v. Typical applications are cooling fan water pump electrohydraulic and electric power steering.

The mic5021 can also operate as a circuit breaker with or without automatic retry. It contains an internal charge pump that fully enhances an external n channel mosfet switch allowing it to remain on indefinitely. Its 3 high side and 3 low side output stages are powerful enough to drive mosfets with a gate charge of 400 nc with rise and fall times of approximately 150 ns.