TC4469 PDF

The TC/TC/TC devices are a family of four-output CMOS buffers/ MOSFET drivers with A peak drive capability. Unlike other MOSFET drivers. Microchip Technology TC PMIC – Gate Drivers parts available at DigiKey. I would like to use a driving chip by the name of TC It is a “Logic-Input CMOS Quad Driver”. I looked at the datasheet and found a circuit.

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TC MOSFET H-Bridge Driving Question

Typical motor supplies are not stable and not spike-free the 18V zener they show in the circuit is there to catch spikes and tv4469 requred to stop the motor frying the driver chip!

It has nothing to do with back-EMF protection; in figure it’s pretty clear that none is being used there. Look at the datasheet for the HIPA to see how this sort of thing is normally done – with proper MOSFET drivers you get protection functionality like shoot-through prevention and under-voltage protection, which you need in the real world.

Chagrin Faraday Member Posts: Application Notes Download All. The TCX series will not latch under any conditions within yc4469 power and voltage ratings.

TC – Power MOSFET Drivers – Power Management

I have attached a picture of the circuit that can be found at the bottom of this post I hope. I would like to use a driving chip by the name of TC Only show products with samples.


Each driver has been equipped with a two-input logic gate for added flexibility. This seems to be how the datasheet wants you to do it odd. Quick Guide to Microchip Development Tools. Sampling Options Buy Now. Or in other words it’s to avoid shoot-through. Buy from the Microchip Store.

I am confused by this because I thought the diodes should be placed in the other direction, so there would be current limited on the way into the gate, and then the diode would allow the current to quickly discharge.

They are not subject to damage when up to 5V of noise spiking either polarity occurs on the ground line.

When discharging, the current has to go out through the resistor. They can accept up to half an amp of inductive kickback current either polarity into their outputs without damage or logic upset.

Here is the link to the datasheet: MarkT Brattain Member Posts: To my knowledge, these diodes are currently bypassing the gate resistor and allowing the gate of the MOSFET to charge without any current limiting. Could someone tell me td4469 these diodes are placed in this direction? Heavily loaded clock lines, coaxial cables, and piezoelectric transducers can all be easily driven with the X series drivers.

In Production View Datasheet Features: It sounds like a superior method. Alternatively, I added a link to the datasheet, where the circuit can be found on page For pricing and availability, contact Microchip Local Sales.


In many cases I’ve had a lot of problems as fc4469 result of back EMF frying mosfet and BJT components, it’s likely the diodes and resistors are providing this in the example circuit. The only limitation on loading is that total power dissipation in the IC must be kept within the power dissipation limits of the package.

While it’s a different part, you may wish to look at the datasheet for the L H-bridge, it ct4469 a better example of how you want to configure the diodes: I looked at the datasheet and found a circuit diagram that I don’t completely understand.

Automotive Recommended Product Selector Guide. That circuit only works from a stable 12V supply.

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Please contact sales office if yc4469 weight is not available. Looking tf4469 the datasheet, I’m guessing what you’re going to be using are two drivers? The TCX drivers can source up to mA into loads referenced to ground. Thanks for all of the information. In addition, all terminals are protected against ESD to at least V.

At this point, I am not sure whether I will be switching the H-bridge at high frequency 20kHz which is out of hearing range or not, but for now I would like to design my circuit with the capability of high frequencies.