Alright, i am getting upset. I dont have very much documentation for the h-bridge i am using, but it is part no. zhb6790.
Anyways, i am using 2 pins from a pic to drive a coil/magnet, type device. I have have 1 pin of the pic tied to the bases of the upper left, and the lower right (using current limiting resistors). The pin 2 from the pic to the other bases. When i first powered it up at a freq of 40Hz it seemed to be working fine. I had the voltage pretty low, about 3 volts, and the coil was drawing about a quarter amp. However, when i took it past 5 volts it drew about 1 amp and blew out the chip. It says on my data sheet they are rated to 2.5 amps. What am I doing wrong here? Does anyone have any diagrams on wiring up one of these chips?
thanks for any help.
Dave
Anyways, i am using 2 pins from a pic to drive a coil/magnet, type device. I have have 1 pin of the pic tied to the bases of the upper left, and the lower right (using current limiting resistors). The pin 2 from the pic to the other bases. When i first powered it up at a freq of 40Hz it seemed to be working fine. I had the voltage pretty low, about 3 volts, and the coil was drawing about a quarter amp. However, when i took it past 5 volts it drew about 1 amp and blew out the chip. It says on my data sheet they are rated to 2.5 amps. What am I doing wrong here? Does anyone have any diagrams on wiring up one of these chips?
thanks for any help.
Dave