GENERAL INFORMATION:
The "FL" Series of floating-hot-deck, low-voltage power supplies offers an integrated solution for systems requiring LV power & controls with high-voltage isolation. Combining a highly isolated, DC-to-DC, multi-output low-voltage power supply (LVPS) with an advanced isolated digital & analog I/O topology, the "FL" sub-system provides both power and controls to floating-hot-deck circuitry. This solution, when combined with one or more UV HVPS or other circuitry, can provide highperformance solutions for applications such as:
- Floating/Stacked Ion- or E-Beam Biases
- Floating Filament Bias
- Floating Pulsers & Gated Grids
- Floating Capacitance Meters
- Floating High Side Current Monitors
- Floating Leakage Testers
Please contact UltraVolt's customer service department for an analysis of your requirements.
DESIGN METHODOLOGY:
The "FL" Series utilizes a dual-ended forward converter topology with a nominal switching frequency of 80% efficiency. The power stage is protected from intermittent output-current overloads or short circuits vias a primary current limit circuit. The isolated digital I/O channel(s) are optically transmitted directly to the floating hot deck. The isolate analog I/O channel(s) are converted to digital data and optically transmitted directly to the floating hot deck for conversion back to the analog.
COMPATIBILITY:
The "FL" Series works directly with any UltraVolt "A" or "C" Series DC-to-DC HVPS from 0 to 62V through 0 to 35kV @ 0 to 4 watts through 0 to 20 watts. By providing isolated power, TTL enable/disable, and voltage programming, UV HVPS can be floated or stacked on one another.
ISOLATED POWER OUTPUTS:
The "FL12-12W" provides floating +12VDC @ 1 Amp, -12VDC @ 10 mA, and +5VDC @ 10 mA from a single ground side +12VDC input. The ??FL24-24W" provides floating +24VDC @ 1 Amp, -12VDC @ 10 mA, and +5VDC @ 10 mA from a single ground side +24VDC input. The main output is typically used to drive a floating HVPS, or filament switching regulator, etc. The -12VDC is for use with the +DC in providing bias to floated Op-Amps, DACs & ADCs. The +5 VDC can run floating micro-controllers or watchdog reset circuits.
ISOLATED CONTROLS: DIGITAL CHANNELS
The "-I/O" option provides isolated digital I/O channel(s) from the grounded system side to the floating hot deck. The TTL bit is inverted. The output, a schmitt trigger TTL buffer, sources up to 0.8mA and sinks up to 13 mA. This bit is typically used to enable/disable a floated UV HVPS. It can also be used at up to 300kHz to drive a pulser, gate, sample-and-hold multiplexer or to communicate with a floated micro controller. The "-R/B" option provides one additional down channel.
ISOLATED CONTROLS: ANALOG CHANNELS
The "-I/O" option provides isolated analog I/O channel(s) from the grounded system side to the floating hot deck. The analog signal is converted to digital and translated back to analog at the floating hot deck. The output is buffered with a source impedance of 1.5K?. This signal is typically used to remote program a floated UV HVPS. It can be used at up to 30 Hz to drive an amplifier, sample-and-hold, or to program other devices such as a floating filament regulator. The "-R/B" option provides two additional down channels.
STANDBY MODE:
All "FL" models feature an LVPS enable/disable function. When the enable is TTL 0 (< +0.7 VDC +/-0.2 Isink=1mA), the floating LVPS is in standby mode. All isolated outputs go to 0VDC; input current drops to < 90 mA; and all functions are shut down except the +5 Volt reference, which is always operational. If the LVPS enable pin is left unconnected, TTL 1 or at greater voltages up to +32VDC the converter operates normally.
MECHANICAL:
"FL" Series units are in PCB-mountable plastic cases requiring a footprint of 8.5 in2 and only 10 in3 of volume. Mounting plates and brackets are available for chassis mounting. See Application Note AP-6 for thermal considerations and for mounting configurations.
ENVIRONMENTAL:
The "FL" Series provides full power operation at case temperatures from -20 to +55oC. All units receive a 24-hour burn-in prior to final testing. Extended temperature range is available along with other enhanced capabilities. Please contact the factory.
Isolated up to 15kV
DC leakage current of 80% efficiency. The power stage is protected from intermittent output-currentoverloads or short circuits via a primary current limit circuit. The isolated digital I/O channel(s) are optically transmitted directly to the floating hot deck with a schmitt trigger buffer providing glitchfree output on the floating hot deck. The isolated analog I/O channel(s) are converted to digital data and optically transmitted directly to the floating hot deck for conversion back to analog.
COMPATIBILITY:
The FL Series works directly with any UltraVolt A or C Series DC-to-DC HVPS from 0 to 62V through 0 to 35kV @ 0 to 4 watts through 0 to 20 watts. By providing isolated power, TTL enable/disable, and voltage programming, UV HVPS can be floated or stacked on one another.
ISOLOLATED POWER OUTPUTS:
The FL12-12W provides floating +12VDC @ 1 Amp, -12VDC @ 10 mA, and +5VDC @ 10 mA from a single ground side +12VDC input. The FL24-24W provides floating +24VDC @ 1 Amp, -12VDC @ 10 mA, and +5VDC @ 10 mA from a single ground side +24VDC input. The main output is typically used to drive a floating HVPS, or filament switching regulator, etc. The -12VDC is for use with the +DC in providing bias to floated Op-Amps, DACs & ADCs. The +5 VDC can run floating micro-controllers or watchdog reset circuits.
ISOLATED CONTROLS:DIGITALCHANNELS
The I/O option provides isolated digital I/O channel(s) from the grounded system side to the floating hot deck. The TTL bit is inverted. The output, a schmitt trigger TTL buffer, sources up to 0.8mA and sinks up to 13 mA. This bit is typically used to enable/disable a floated UV HVPS. It can also be used at up to 300kHz to drive a pulser, gate, sample-and-hold multiplexer or to communicate with a floated micro controller. The “-R/B� option provides two additional down channels.
ISOLATED CONTROLS: ANALOG CHANNELS
The I/O option provides isolated analog I/O channel(s) from the grounded system side to the floating hot deck. The analog signal is converted to digital and translated back to analog at the floating hot deck. The output is buffered with a source impedance of 1.5K?. This signal is typically used to remote program a floated UV HVPS. It can be used at up to 30 Hz to drive an amplifier, sample-and-hold, or to program other devices such as a floating filament regulator. The R/B option provides two additional down channels.
STANDBY MODE:
All FL models feature an LVPS enable/disable function. When the enable is TTL 0 (< +0.7 VDC +/-0.2 Isink=1mA), the floating LVPS is in standby mode. All isolated outputs go to 0VDC; input current drops to < 90 mA; and all functions are shut down except the +5 Volt reference, which is always operational. If the LVPS enable pin is left unconnected, TTL 1 or at greater voltages up to +32VDC the converter operates normally.
MECHANICAL:
"FL" series units are in PCB mountable plastic cases requiring a footprint of 8.5 in² and only 10 in³ of volume. Mounting plates and brackets are available for chassis mounting. See Applications note AP-6 for thermal considerations and mounting configurations.
ENVIROMENTAL:
The "FL" Series provides full power operation at case temperatures from -20 to +55°C. All units recieve a 24-hour burn-in prior to final testing. Extended temperature range is available along with other enhanced capabilities. Please contact the factory.
UltraVolt, Inc. 1800 Ocean Ave., Frnt, Ronkonkoma, NY 11779 www.ultravolt.com (800) 9HV-POWER
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