OmniDrive™ - 8 Channel LED Power Supply
Features
- 0-2 Amps / 0-5.5V Per Channel
- 8 Independently Controlled Current Sources
- 4 Wire Voltage Monitoring
- D Cor Pulsed up to 1kHz
- 2 External Temperature Inputs
- USB 2.0 and Ethernet
- Software Control (SCPI Compatible)
Applications
- LED Lifetime Testing and Test Systems
- LED Burn-In Racks and Systems
- RGB LED Color Mixing
- LED Product Prototypes
The OmniDrive™ from Orb Optronix is specifically designed for LED test and measurement in lifetime testing applications. Each OmniDrive™ has 8 separate current output channels. Each output channel can be independently assigned a current amplitude via computer controlled software. Four internal pulse generators can be programmed to control frequency, duty cycle, and phase. Each output channel may be configured to use one of the four internal pulse generators or one of 2 external waveforms.
The synchronized measurement capabilities of the OmniDrive™ include current and 4-wire forward voltage monitoring for accurate power measurements at each LED. When operating in PWM mode, current, and voltage measurements are synchronized to the on-time of the LED. Additional external thermistor or RTD temperature inputs allow measurement of LED or TEC temperatures in LED lifetime test applications. The voltage, current and temperature monitors can be configured to shut off specific channels if out of range. Software control allows the user to easily set up multi-LED lifetime tests by assigning current and measurement sequences to each channel. For LED testing applications that require turning some LEDs completely off during optical measurement sequences, the OmniDrive™ ensures no light is emitted by HB LEDs with an off state leakage current of less than 10 microamps.
Preliminary Specifications
| Operating Modes |
| Single Pulse | 8 independent adjustable output pulse channels synchronized to an internal or external
trigger for single pulse Vf and If measurements |
| PWM | 8 independent current amplitudes driven by 4 independent pulse generators synchronized
for measurements of pulse Vf and If |
| CW Mode | 8 independent DC output channels with Vf and If measurement |
| Output |
| Connector | 44 Pin High Density D-sub |
| Output Power | Max 80 Watts |
| Number of Output Channels | 8 |
| Maximum Output Voltage (per channel) | 5.5 V (DC and PWM) |
| Maximum Output Current (per channel) | 2.0 A (DC and PWM) |
| Current Resolution | 1 mA |
| Current Accuracy | 2 mA (or +/- 0.25% whichever is larger) |
| Current Ripple Max | 20mA peak-to-peak |
| Power Per Chanel Max | 14 W |
| Pulse Frequency Max | 1 kHz |
| Pulse width Resolution | 1 μs |
| Pulse Width Min | 100 μs (measured from mid level of rise time). Note: No forward voltage measurement for pulses. |
| Diode Configuration | Drive and return line must float with respect to other channels and/or ground. (i.e. no common-cathode, common-anode, grounded cathode, grounded anode) |
| Input |
| Temperature Monitoring | Input RTD or Thermistor |
| Number of Temperature Monitor Channels | 2 |
| Temperature Measurement Resolution | 0.4 C (with 10k RTD) |
| Voltage Monitoring per Channel | 4 wire, synchronized in pulse mode |
| Trigger / Sync Connector | 1 BNC (Trigger In and Sync Out) |
| Trigger In | 3.3V CMOS or 5V Tolerant |
| Sync Out | 3.3V CMOS |
| Voltage Range | 85-132 VAC (47-44Hz) |
| Inrush Current | 15 A |
| Input Power Max | 150W |
| Shut-Down | Programmable software fault based on current, voltage,
or temperature measurement limits |
| Environmental |
| Operating Temperature Range | 15 to 50C |
| Storage Temperature | -25 to 65C |
| Cooling | Forced Air (enters sides, exits back) |
| Computer Interface and Software |
| USB 2.0 Full Speed and 10/100BaseT Ethernet Port |
| Windows Software with GUI for independent channel control and sequencing for up to 256 channels |
| SCPI Compatible |
| .NET Controls Available |
copyright © Orb Optronix 2010
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