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LED driver micro-modules incorporates circuitry in single design

05 Jun 2012

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Texas Instruments (TI) has introduced two fully-integrated LED driver micro-modules that eliminate the external components and complex layout placement challenges typical of LED driver designs. The 450-mA TPS92550 and TPS92551 DC/DC LED driver modules are ostensibly the industry's first to incorporate all the required power and passive circuitry into a single IC package. This integration purportedly delivers up to 23W of power to the LED.

According to TI, the 14-W TPS92550 and 23-W TPS92551 are constant-current buck LED driver modules that virtually eliminate the need for power supply design resources and simplify procurement. Only one module replaces four or more components. Together with TI's WEBENCH LED Architect, the lighting developer can quickly design a power management circuit with the minimum components needed to drive a string of up to 18 LEDs. These LEDs may have up to 96-percent power efficiency. All these may result in a fast, easy and compact LED lighting design.

According to the company, here are the key features and benefits of the TPS92550 and TPS92551 LED driver modules:

 • The LED driver micro-modules integrate an inductor, Schottky diode and a handful of other passive components to simplifying design and procurement.
 • To control brightness, the LED current is adjustable from 300 mA to 450 mA.
 • Their easy-to-use, robust IC package provides superior thermal and electromagnetic interference (EMI) performance.
 • The micro-modules' efficient heat dissipation and back metal plate allows for operation in high ambient temperatures.
 • The compact package measures 10.16 mm by 9.85 mm by 4.57 mm.
The TPS92550 and TPS92551 are now available in volume from TI and its authorized distributors. Offered in a 7-pin TO-PMOD package, the suggested retail price for the 14-W TPS92550 is $5.00 per, with the 23-W TPS92551 at $5.50 per, both in 1,000-unit order quantities.

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