Powering Automotive - and More

Date
08/01/2010

 PDF
Module Enable/Disable

Vicor is expanding its already broad line of products to include the V28 Mini to complete the V28 family of wide input DC-DC converters. With an input range of 9V to 36V, the modules are suitable for MIL-COTS and industrial applications operating from 12V or 24V inputs, which are typical for battery systems in vehicles. Fully encapsulated, Vicor Mini modules utilize a proprietary spin-fill process to assure complete, void-free encapsulation for applications in the harshest environments.

The new 28VDC Mini Series models offer 8 different output voltages ranging from 3.3V to 48V with a maximum power of 150W, and four operating temperature grades, including -55°C. Baseplate options include slotted, threaded, and through-hole. The 9-36V input range enables designers to specify one converter to operate in both 12V and 24V vehicle systems, making this product particularly cost effective for the end-user. These DC-DC converter modules use advanced power processing, control and packaging technologies to provide the performance, flexibility, reliability and cost effectiveness of a mature power component. High frequency ZCS/ZVS switching provides high power density with low noise and high efficiency.

The module may be disabled by pulling pin PC below 2.3V with respect to the -Input. This may be done with an open collector transistor, relay, or optocoupler. Multiple converters may be disabled with a single transistor or relay either directly or via "OR'ing" diodes.

The module contains "watchdog" circuitry which monitors input voltage, operating temperature and internal operating parameters. In the event that any of these parameters are outside of their allowable operating range, the module will shut down and pin PC will go low. PC will periodically go high and the module will check to see if the fault (as an example, overtemperature) has cleared. If the fault has not been cleared, PC will go low again and the cycle will restart. The SC pin will go low in the event of a fault and return to its normal state after the fault has been cleared.

The PR pin supports paralleling for increased power with N+1 (N+M) redundancy and phased array capability. Modules of the same input voltage, output voltage, and power level will current share if all PR pins are suitably interfaced.

  • DC coupled single-wire interface. All PR pins are directly connected to one another. This interface supports current sharing but is not fault tolerant. Negative In pins must be tied to the same electric potential. Up to three converters may be paralleled by this method.
  • AC coupled single-wire interface. All PR pins are connected to a single communication bus through 0.001?F (500 V) capacitors. This interface supports current sharing and is fault tolerant except for the communication bus. Up to three converters may be paralleled by this method.
Transformer coupled interface. For paralleling four or more converters a transformer coupled interface is required. For details on this configuration please refer to the design guide at: http://www.vicorpower.com/mmmguide Lead times can be as short as three weeks for prototype quantities. For data sheets and additional information on Vicor DC-DC and AC-DC power products, visit the Vicor website at: www.vicorpower.com

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