Compact outline for small-power-apps module enables novel mounting

May 23, 2014 // By Graham Prophet
Vincotech has released its ‘flow 0B’ housing sized for small power applications. The flowCIP 0B with a PIM + PFC topology; and flowPACK 0B with a six-pack topology; are the first two lines to feature this new housing.

The flow 0B is a smaller version of the flow 0 housing, designed to meet the demands of smaller power embedded drives, frequency inverters, solar applications and switching mode power supplies. It is another step forward towards small power applications, which today are largely the domain of discrete components. The flow 0B housing brings the benefits of speed and flexibility, miniaturising capability, low stray inductance and efficiency-enhancing features.

A single screw is all it takes to mount this housing to the heatsink. The mounting bridge works like a clamp, applying considerable pressure to the DCB and heatsink. The moulding of the heatsink allows for it to act as a stand-off to support the PCB to which electrical connections are made. The housing offers free pin positioning, a stress-relieved for pins, optional Press-fit pins or pre-applied phase-change material. NTC, shunt resistors or capacitors can directly mounted into the module.

The first of the two initial topologies in the flow 0B housing consists of a PIM + PFC and is called flowCIP 0B. Equipped with a single-phase input rectifier, a PFC booster and a three-phase inverter, it uses high-speed 650V IGBTs for the PFC. A DC capacitor and an NTC are integrated. The flowCIP 0B module rated for the highest current features a PFC circuit based on a nominal chip current of 15A and an inverter section equipped with 10A components.

The second topology is called flowPACK 0B. This standard inverter topology with six IGBTs and freewheeling diodes is available with 1200V and 600V ratings. The 600V variant covers currents ranging from 6A to 30A; the 1200V variant comes with currents ratings between 4A and 15A.