These are mounted on a heatsink and are electrically isolated using thermal pads and nylon washers for the screws.The PIC is powered from a 7805 and Vin is 12-15V.I have had the circuit working just fine and my code seems to work like it should, I could run the motor at different duty cycles and different frequencies.The latest burnout happened today when I was testing the motors ability to run slow at 10% PWM duty and at different frequencies. I know this will actually turn on the high side FETs during the power up time where the PIC is initializing but I forgot all about the pulldowns until I was soldering my PCB and it was hard to pull the gates to Vin due to the PCB layout, and I guess it doesn't matter since the lowside FETs are off during power up.The lowside FETs are FDP8896 (N-Channel, 30V, 92A, 5.9mOhm) and the highside FETs are NDP6020P (P-Channel, -20V, -24A, 50mOhm). All the FETs have a 100k pulldown resistor on the gate. I'm using the built-in PWM controller in the PIC.The 2 inputs on the TC4424 that controls the lowside FETs, have a pulldown resistor of 100k. Hi,I'm building a H-bridge full bridge circuit for controlling a windshield wiper motor (around 2A unloaded) and it keeps burning the MOSFETs and MOSFET drivers.A PIC16F1825 is connected to the TC4424's, directly from PIC pins to TC4424 inputs. This can result in serious or fatal injuries and Confine long hair so that it cannot be sucked into damage to property.This can result in personal injury. ■ Charging cables or power supply units not explicitly approved for the blower by STIHL may cause a fire or explosion. The data next to this symbol indicates the energy 7 Charging Socket content of the battery according to the cell manufacturer’s specification.Wear safety glasses. NOTICE This symbol indicates dangers that can cause damage to property.English 4 Safety Precautions 6 Intake Screen This symbol shows that an LK 45 charging cable LK 45 Protects the operator from moving parts inside the must be used. ► The measures indicated can avoid serious injuries or death. We develop and 21.2 STIHL LK 45 Charging Cable.English 3 Overview Symbols used with warnings in the text WARNING This symbol indicates dangers that can cause serious injuries or death. STIHL BGA 45 Instruction Manual.6.3 LEDs.12 18.1 STIHL BGA 45 Blower.17 18.2 STIHL LK 45 Charging Cable.Dear Customer, 21.1 STIHL BGA 45 Blower.18 Thank you for choosing STIHL.
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