Additional Features:
- 100W output (20V @ 5A)
- Sinks up to 3A
- Optimized for battery-powered device testing
- Ultra-fast transient response to load changes
- 5A continuous output
- Pulse peak, average, and baseline current measurements
- 100nA DC current sensitivity
The 2304 Power Supply provides both voltage control and power consumption monitoring for automated testing of portable, battery-operated devices. These power supplies are optimized for testing battery-operated, wireless communication devices such as cellular phones that undergo substantial load changes for very short time intervals. These power supplies exhibit outstanding voltage stability during pulse load changes and can simultaneously measure load currents, even if they are short pulses. In addition, this family of power supplies can sink current and, thus, take on the characteristics of a discharged, rechargeable battery for testing chargers and charger-control circuitry.
The 100W Model 2304 can supply 5A at 20V to serve the peak pulse loading requirements of battery-operated devices. The maximum current of 5A can be delivered continuously. The Model 2304 can supply up to 20V DC.
Keithley’s High Speed Power Supplies are designed to simulate the current drive capacity of a battery. The power supplies simulate a battery’s response during a large load change by minimizing the maximum drop in voltage and recovering to within 100mV of the original voltage in 40µs or less.
When a portable device such as a cellular phone switches from standby mode to the full power mode of operation, the current draw on the power supply can change by as much as 1000%. While a battery’s voltage will decrease by the value of the voltage drop across the battery’s low internal resistance, a conventional power supply will have a significant voltage drop (more than one volt) and take milli-seconds to recover to the original voltage level. For portable devices that operate at full power only for short intervals, the full power event is over before a conventional power supply can recover.
For example, cellular phones designed in accordance with the GSM cellular phone standard transmit and receive information in 576µs pulses. If the power supply used to test them cannot recover quickly enough, the performance of the device-under-test will be compromised by the power supply. If the power supply voltage drops below the threshold of the phone’s low battery detection circuitry for a sufficient amount of time, the phone will turn off during testing, giving a false indication of a failed device.
The Models 2304’s fast transient response to large load changes will enable test engineers to test their portable products properly and eliminate false failures due to conventional power supplies with slow response times. In this way, the power supplies ensure maximum production throughput when testing portable devices.
As manufacturers of portable devices strive to extend battery life and the length of time between recharges, power consumption has become an important performance indicator. Therefore, in production testing, accurate peak power and average power measurements are critical.
These measurements are complicated by the fact that wireless telecommunication devices draw full load current in short pulses. The Models 2304’s pulse readback measurement mode makes it possible to capture peak and average values on pulses as short as 60µs. This allows the power supply to power a device-under-test and determine its current consumption to qualify the device for its specified power consumption.
In addition to making measurements on short pulses, the 2304 power supply can measure a current pulse peak or a current pulse train that is as long as 833ms. For random pulse trains that have periods longer than 833ms, the power supplies have a special long integration mode that can make an average current measurement on up to 60s of data.
| Manufacturer | Keithley |
|---|---|
| Condition | Used |
| Current | 5 A |
| Voltage | 20 V |
| Power | 100 W |