Mosfet High Side Driver Charge Pump

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.

Mosfet high side driver charge pump.

Typical applications are cooling fan water pump electrohydraulic and electric power steering. 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. 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. 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 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 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. 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. It contains an internal charge pump that fully enhances an external n channel mosfet switch allowing it to remain on indefinitely.

An internal micropower regulator and charge pump generate the high side drive output voltage while requiring no external components. This simple inexpensive charge pump circuit overcomes the maximum on time limitation of the bootstrap circuit. 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 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.

Its internal charge pump fully enhances an external n channel mosfet switch enabling it to remain on indefinitely. The charge pump typically supplies 30μa charging 800pf of gate capacitance in 400μs vbatt 15v. The device consumes a low 77µa of. The ltc7001 s powerful 1ω ga.

The mic5021 can also operate as a circuit breaker with or without automatic retry. Its powerful driver can easily drive large gate capacitances with very short transition times making it. The ltc 7001 is a fast high side n channel mosfet gate driver that operates from input voltages up to 135v.