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ARG3000 33W Adjustable DC/DC Converter

The
manufacturer says...
Chipcenter's
Nasser Kutkut, Ph.D., says...

Beta Dyne has introduced the ARG3000 is an isolated adjustable 33W DC/DC converter whose input voltage can accept 12, 24 and 48Vdc and whose output can be adjusted from 5-220Vdc. Its patented design allows the ARG3000 to source or sync current at its output. The converter can be driven from an external low frequency signal generator up to 1kHz to provide a 220VPP output voltage. The ARG3000 is input power limited and will allow up to 33W at maximum VO. An onboard adjustable sine wave reference can be used to provide a ringing signal for up to 15 RENs. Applications include Adjustable Power Supplies (Unipolar or Bipolar), Signal Generators, Ring Generator, and Longitudinal Noise Generators.

The multipurpose module RG3000 is an isolated power amplifier that combines switching and linear topologies to achieve high efficiencies and linearity over a wide input voltage range. The switching power converter delivers power to the load from the input power source, while the linear power amplifier at the output section assists the load during the discharging phase of the operation. The RG3000 operates similarly to a linear power amplifier with a push-pull power stage. Specifically, during the PUSH phase the power OPAM delivers power to the load from the positive supply source through the output power transistor, and during the PULL phase it sinks power from the load through the complimentary power transistor to the negative power supply as is shown in Figure 1. The RG3000 needs only one power supply; its output is completely isolated from the input and offers very high efficiency and excellent linearity. The high efficiency is the product of the switching power transfer, while the linearity is due to the high open loop gain of both the converter and the linear amplifier. In Figure 2, a block diagram of the RG 3000 is given. During the PUSH phase, the DC/DC converter delivers power to the output under the command of VIN, while the linear amplifier-which shares the same negative feedback loop-is OFF. During the PULL phase, the DC/DC converter is OFF and the linear amplifier turns ON, as needed depending on the output loading.

In many applications, the power needs of the load dictate that the power supply must be able to source as well as sink current at its output. While most isolated power supplies can only source current, additional control and power circuitry would need to be added to provide current sinking capability. Well, not necessarily if you use Beta Dyne's new ARG3000 isolated DC/DC converter. The ARG3000 combines an isolated switching supply that delivers power to the load and a linear supply that can sink current by the load. It mimics a push-pull amplifier except that during the push mode the power is delivered by a switching supply yielding higher efficiency. Applications for this new combo switching/linear amplifier include uni- and bi-polar power supplies, signal and ring generators.

Press Release


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