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Electronic Engineering News Digest |
COMPONENT NEWS | INDUSTRY NEWS | RoHS/WEEE NEWS |
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Introducing MASTR IV TETRA Base StationTyco Electronics announced today that its Wireless Network Solutions business introduced the MASTR IV ("Master Four") Terrestrial Trunked Radio (TETRA) Base Station to power secure digital trunked radio communications via TETRA. The addition of the MASTR IV product extends the M/A-COM MASTR series and marks the first MASTR product to facilitate the TETRA air interface with the VIDA (Voice, Interoperability, Data and Access) network platform. [Read more...] |
| Features |
| Description |
The TPS206x power-distribution switches are intended forapplications where heavy capacitive loads and short-circuits are likely to be encountered. This device incorporates 70-mΩ N-channel MOSFET power switches for power-distribution systems that require multiple power switches in a single package. Each switch is controlled by a logic enable input. Gate drive is provided by an internal charge pump designed to control the power-switch rise times and fall times to minimize current surges during switching. The charge pump requires no external components and allows operation from supplies as low as 2.7 V.
When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by switching into a constant-current mode, pulling the overcurrent (OCx) logic output low. When continuous heavy overloads and short-circuits increase the power dissipation in the switch, causing the junction temperature to rise, a thermal protection circuit shuts off the switch to prevent damage. Recovery from a thermal shutdown is automatic once the device has cooled sufficiently. Internal circuitry ensures that the switch remains off until valid input voltage is present. This power-distribution switch is designed to set current limit at 1.5 A typically.
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