Wednesday, June 20, 2018
Publication Date: 10/1/2008
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Keithley Intros Fast Dual-Channel Supply
Dual-channel power supply.
Cleveland, OH — Keithley Instruments, Inc. has introduced the Model 2308 Portable Device Battery/Charger Simulator, a dual-channel battery- and charger-simulating power supply designed to provide the lowest cost testing of both the growing range of mobile phones with new, complex transmission schemes and other types of new portable devices that consume extremely low amounts of power.

The Model 2308's fast transient output response maximizes production yields by maintaining a stable voltage level under dynamic loading conditions. In addition, its measurement engine enables more accurate characterization of both full power operation and low current sleep modes for quantifying power consumption so that design and manufacturing can ensure that battery life of the latest portable electronic devices is maximized. The Model 2308 is optimized for ultra-fast test times, allowing manufacturers to lower their cost of test.

Unlike conventional power supplies, the Model 2308 has extremely fast recovery even when load currents change by a factor of 10 or greater. This can happen when a portable device or component transitions near-instantaneously from a sleep or standby state to a full power operating state and then returns to the original state. The Model 2308 features functionality that makes it suitable both for production test as well as research and development (R&D). In production applications, the Model 2308 employs four-wire sourcing and remote sensing for precision voltage sourcing even when the DUT cannot be close to the power supply. The superior source accuracy enables a Model 2308 channel to act as a calibration source for battery monitoring circuitry used in mobile phones and other portable devices. With two channels packed into one half-rack instrument, one channel can simulate the battery and the other can simulate a charger. In addition, each channel can act as a load as well as a source. Thus, the battery channel can sink current to simulate a discharged battery so that the DUT's charger control circuit can be tested.

For R&D applications, the instrument not only has wide current measurement range for analyzing power consumption, the power supply also has an analog output to enable developers to analyze all the details of their load current including the start-up sequence and all operating modes. Thus, R&D engineers can easily determine total device power consumption. In addition, the unit can simulate the performance of a battery by simulating the battery's internal resistance with a programmable output resistance. Similar to a battery, the Model 2308's output resistance can change while voltage is being sourced to simulate the increase in the battery's internal resistance as the battery discharges. Thus designers can determine how their device will perform when powered by what will look like the actual source.

The instrument is particularly well-suited for design and test of low-power, battery-operated devices, such as 3G mobile phones, smart phones, MP3 players, Bluetooth headsets, PDAs, and portable GPS receivers. The Model 2308 is also optimized for components and sub-systems, such as baseband/power control chipsets, RF power amplifiers, RF power transistors, transmitters, and transceivers.

Contact: Keithley Instruments, Inc., 28775 Aurora Rd., Cleveland, OH 44139-1891 800-688-9951 or 440-248-0400 fax: 440-248-6168 E-mail: Web:

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