Dual-output power blocks simplify DC/DC design

International Rectifier has introduced the industry's first dual-output, two-phase DC/DC power blocks in single, easy-to-use BGA packages for synchronous buck applications.

International Rectifier has introduced the industry's first dual-output, two-phase DC/DC power blocks in single, easy-to-use BGA packages for synchronous buck applications.

The new devices simplify design, reduce size and streamline computing and telecommunication power system time to market.

Today's advanced telecomms, networking and server systems have as many as six voltage rails throughout the system board.

As the demand to process more information increases, voltage rails must increase their current capability.

The new iPOWIR iP1201 and iP1202 give computer and telecommunications designers a single device to supply two independent voltage rails, simplifying power supply design and reducing board space by up to 59% compared to equivalent circuits made with discrete components.

In addition, the new power blocks have no derating requirements up to 90C circuit board and device case temperature, unlike other module solutions that require derating by as much as 50% in similar environments.

The iP1201 and iP1202 are fully optimised for medium current synchronous buck applications requiring up to 15A dual output or 30A single output with an interleaved input.

The new devices feature built-in, full-function PWM control and protection circuits with optimised power semiconductors and passive components to achieve high power density.

Only an output inductor, input and output capacitors per channel, and a few external components are required to build a complete dual output synchronous buck power supply.

Both the iP1201 and iP1202 are extremely flexible, allowing a wide input and output voltage range.

The iP1201 covers input bus voltages from 3 to 5.5V and the iP1202 covers from 5.5 to 13.2V, with outputs as low as 0.8V and as high as 5V at full current.

The new devices provide overvoltage and overtemperature protection, and independent soft start for each output enables various power sequencing and tracking options.

In addition, a single control pin on the new iP1201 and iP1202 enable an overcurrent hiccup or overcurrent latch function.

The hiccup function is good for high-reliability systems that require immediate output load voltage recovery once the short circuit is removed, thus maximising system uptime and preventing the overall system power to be manually recycled.

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