Re: Kickback suppression in twin coils

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Dr. Resonance by way of Terry Fritz <teslalist-at-qwest-dot-net>" <resonance-at-jvlnet-dot-com>


International Rectifier has developed a special IC designed especially to
drive ignition coils and other devices that present unique kickback
problems.

Their new IC, designated IRGS143C40L incorporates special clamping diodes
and is designed to operate / switch capacitive loads into inductive coils.
It includes on-chip voltage clamps between both gate-emitter and also
gate-collector.

It can dissipate an amazing 54 watt continuous (125 w. max) and can operate
in the 15-20 Ampere range with heatsinks.  It's available in the standard
TO-220AB package.

It sounds perfect for your work and is much better than a standard 555
driver.  The 555 must be clamped external and the lead inductance can cause
oscillator ring problems.

You can  download the datasheet from their website.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
 >
 >          I'm new to the list and I've got a question about running twin
 > coils. I'm thinking primarily of driving ignition coils or flybacks,