NBU-0808 discharge circuit
Applications
- Discharge circuit for flashlamp operation
Features
- Flashlamp voltage – up to 800 V (1000V on request)
- Flashlamp current – up to 1000 A
- Includes a built-in simmer supply module and all necessary flashlamp trigger circuits
- Pulse width – adjustable, from 50 us to 100 ms
The NBU-0808 discharge circuit is designed for simplification of solid-state laser systems development. The module forms quasi-rectangular pulses on a flashlamp using energy stored in external capacitors bank and provides simmer current during the interval between pulses. By default, NBU-0808 includes capabilities both for serial and external triggering.
The flashlamp operating frequency and pulse duration is to be varied by +5 V TTL signal from an external control device to the respective pin.
The NBU-0808 discharge circuit is a bit simplified and less power module than NBU-1012, but it has more attractive price. The module includes IGBT, its driver, protective circuits, simmer and trigger circuits and controls. It also contains a fan for active cooling. The module doesn’t have any embedded discharge resistors, although includes all the necessary circuits to control them. Discharge resistor assemblies of different size and resistance can be purchased as accessories by us.
Let us emphasize, NBU-0808 is not a stand-alone solution. For proper operation it requires capacitor charging power supply and capacitor bank, an external control device to form the pulses, external +24 V DC power supply, as well as some minor parts (see also the picture below).
Simplified as well as more complicated modifications are available on request.
Low voltage input:
Pulse parameters:
(depends on flashlamp impedance K0)
500 A for pulse width > 1 ms
(other on request)
min / max
Recommended wires:
for serial triggering additional insulation (e.g. with silicone tubing) or spacing (e.g. with spiral bundle hose) of L– wire is required
Simmer parameters:
200-500 mA on request
Triggering parameters:
External triggering:
(other on request)
Serial triggering:
(other on request)
Safety:
Environment:
Other:
The following options are available on request:
- Integrated current sensor
- High power / current / voltage IGBT with extended parameters
- Low power / current / voltage IGBT with reduced cost
- Digital RS-232 / RS-485 interface
- Modified cables and connectors
- Modified simmer and / or trigger parameters
Modifications
capability of both serial and external flashlamp triggering
Example
capability of both serial and external flashlamp triggering