NBU-1508 discharge circuit
Applications
- Discharge circuit for flashlamp operation
Features
- Flashlamp voltage – up to 1500 V
- Flashlamp current – up to 1000 A
- Includes a built-in simmer supply module and all necessary flashlamp trigger circuits
- bell-shaped pulse
The NBU-1508 discharge circuit is designed for simplification of solid-state laser systems development. The module utilizes complete discharge of a relatively small capacitor bank (a typical value is 100uF), which, together with an external inductor, forms short (tens to hundreds of microseconds) bell-shaped pulses on a flashlamp and provides simmer current during the interval between pulses. Typical applications are Q-switched Nd:YAG lasers or similar. By default, the NBU-1508 includes capabilities both for serial and external triggering.
The flashlamp operating frequency is controlled by +5 V TTL signal from an external control device to the respective pin. The pulse duration is defined by the capacitor discharge time, which depends on the L, C and flashlamp parameters. Please, ask us for details if needed.
The module includes a thyristor, its driver, protective circuits, simmer and trigger circuits and controls. It also contains a fan for active cooling.
It’s important to emphasize that the NBU-1508 is not a stand-alone solution. It requires a capacitor charging power supply, an external inductor and capacitor bank, an external control device to start pulses, an external +24 V DC power supply, as well as some minor parts and controls to operate properly (see also the picture below).
An important feature of the NBU-1508 is clear and visible separation between low voltage and high voltage parts. The 24V power input and all interface circuits (SIM and PWF) are separated from the high voltage circuits by 4mm creepage distances and solid insulation to 2500VAC test voltage (1 MOOP/MOPP).
Some modifications are available on request. We have also IGBT models, which form quasi-rectangular pulses NBU-0808 discharge circuit and NBU-1012 discharge circuit.
+24VDC Input:
Pulse parameters:
500 A for pulse width > 1 ms
(other on request)
Recommended wires:
for serial triggering additional insulation (e.g. with silicone tubing) or spacing (e.g. with spiral bundle hose) of LAMP– wire is required
Simmer parameters:
Flashlamp triggering parameters:
External triggering:
Recommended p/n ZS1324-24V LUL1(H) by Excelitas Technologies (Digikey p/n ZS1324-24VLUL1(H)-ND)
Serial triggering:
Safety:
Environment:
Other:
The following options are available on request:
- Integrated current sensor
- High power / current / voltage thyristor with extended parameters
- Digital RS-232 / RS-485 interface
- Modified cables
- Modified simmer and / or triggering parameters
Modifications
Example
Download user manual (1.2MB)