Powerelectronics 2904 120114diodes

Trench Super Barrier Rectifiers Meet Efficiency Targets of Next Generation Chargers

Dec. 8, 2014
The first devices to be launched from Diodes Incorporated's proprietary Trench SBR® (Super Barrier Rectifier) technology are enabling the stringent efficiency and temperature targets of next generation battery chargers to be achieved.

The first devices to be launched from Diodes Inc.'s proprietary Trench SBR® (Super Barrier Rectifier) technology are enabling the stringent efficiency and temperature targets of next generation battery chargers to be achieved.

With their ultra-low forward voltage, low leakage current and cooler running characteristics, the new Trench SBRs meet the requirements of the charger output rectifier diode, easily coping with the shorter current pulses of  36 kHz discontinuous mode charger designs.

Diodes Incorporated has initially introduced two devices: the 15 A SBRT15U50SP5, for 10 W smartphone chargers; and the 20 A SBRT20U50SLP, for 12.5 W tablet chargers.  Such chargers are becoming smaller and thinner, and have efficiency and temperature targets that cannot be adequately met with traditional Schottky diode solutions.

SBRT15's forward voltage of 0.47 V at 15 A and SBRT20's forward voltage of  0.5 V at 20 A, coupled with an operating temperature of +90 ºC, means conduction losses are minimized and charger efficiencies increased.  The devices' low reverse leakage currents at high temperatures, respectively 105 mA and 100 mA at +125 ºC, also help minimize blocking mode losses.

The SBRT20U50SLP and SBRT15U50SP5 are the first rectifiers to be released from a complete portfolio of Trench SBR devices that span a reverse voltage range from 10 V to 100 V, a current handling capability from 0.2 A to 40 A and a variety of different package options, including Diodes' space-saving PowerDI®123, PowerDI5 and PowerDI5060.

The SBRT15U50SP5 and SBRT20U50SLP TrenchSBRs are priced at $0.25 USD each in 3K quantities.

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