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NBU-1012 discharge circuit


  • Discharge circuit for flashlamp operation


  • Flashlamp voltage - up to 1000 V
  • Flashlamp current - up to 1000 A
  • Pulse width - from 50 us to 100 ms
  • Includes a built-in simmer supply module and all necessary flashlamp trigger circuits
  • 2-year guarantee (option)

Download user manual (1.1MB)

NBU-1012 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 an external capacitor bank) and provides simmer current during the interval between pulses. By default, NBU-1012 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 module includes IGBT, its driver, protective circuits, simmer and trigger circuits, discharge resistors and controls. It also contains a fan for active cooling.

Let us emphasize, NBU-1012 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).

nbu-1012 connections.png

Simplified as well as more complicated modifications are available on request.


Low voltage
+24 V DC
High voltage
Capacitor bank connection


Max. voltage
1000 V
Max. current
1000 A for pulse width < 1 ms
500 A for pulse width > 1 ms
Flashlamp pulse width
up to 100 ms (on request)

Simmer parameters:

up to 300 V
Open circuit voltage
about 1500 V
300-800 mA (500 mA by default)

Triggering parameters:

10 kV / ~160 mJ negative to L- (serial flashlamp triggering)
350 V / ~20 mJ to EXT connector (parallel flashlamp triggering)
Pulse width
~1 us
Restrike rate
a few Hz (automatically adjusted)


Operation temperature
0 … +40 °C
Storage temperature
-20 … +60 °C
0 ... 90%, non-condensing


Size (LxWxH)
225x207x62 mm
2.0 kg
    On request the next options are available:
  • 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
  • Different simmer and / or triggering parameters


NBU-1012 discharge circuit with capability of both serial and external flashlamp triggering


NBU-1012 discharge circuit with capability of both serial and external flashlamp triggering

Download user manual (1.1MB)