Synchronous Buck Driver works with DC/DC converters.

Press Release Summary:




Offered in HTSSOP-14 PowerPAD(TM) packages, UCC27223 driver utilizes Enable pin and proprietary Predictive Gate Drive digital control technology to reduce diode conduction and reverse recovery losses in synchronous rectifier MOSFETs. Employing closed loop feedback system that detects body-diode conduction, Predictive Gate Drive adjusts dead time delays in next switching cycle. It also has ±3A TrueDrive(TM) Gate Drive Output Architecture and 5-12 V input voltage range.



Original Press Release:



TI Adds Enable to Drivers for Non-Isolated, Low-Voltage DC/DC



New Driver with Enable Pin Increases System Power Management

Design Flexibility and Control

DALLAS (Jan. 20, 2004) - Texas Instruments Incorporated (TI) (NYSE: TXN) announced today it is adding an Enable pin to its widely adopted line of high efficiency synchronous buck drivers for non-isolated, low output voltage DC/DC converters. Providing a new driver with Enable gives system power designers improved flexibility and control when managing low output voltages in central processing units (CPUs), computing, telecom, datacom and general merchant power supply systems. See: power.ti.com/sc04019.

The new UCC27223 driver with Enable, and the previously announced UCC27221 and UCC27222 devices produce ±3 A of output drive current for efficient power MOSFET switching at critical Miller plateau thresholds. The UCC2722x family yields two to four percent better efficiency and up to 40 percent improved heat dissipation compared to competing ICs that support low output voltages.

The UCC27223 device's Enable pin and proprietary Predictive Gate Drive digital control technology reduce diode conduction and reverse recovery losses in synchronous rectifier MOSFETs. Employing a closed loop feedback system that detects body-diode conduction, Predictive Gate Drive adjusts dead time delays in the next switching cycle to minimize the conduction time interval in synchronous rectifiers. In addition, the overall converter efficiency improves up to two to four percent.

The new driver incorporates TI's hybrid TrueDrive(TM) output stage with paralleled bipolar and complementary metal-oxide semiconductor (CMOS) transistors to allow efficient current delivery at low supply voltages.

Key features of UCC27223:

Two to Four Percent Efficiency Gains over Competing Adaptive Technologies

±3A TrueDrive(TM) Gate Drive Output Architecture

Enable Pin for Diode Conduction

On-Board 6.5 Gate Drive Regulator

20 V Maximum Supply Voltage

Input Voltage Range from 5 V to 12 V (or from 3.3 V with Higher Bus Rail)

Available Today

The UCC2722x drivers are available in volume from TI and its authorized distributors in a thermally enhanced low profile HTSSOP-14 PowerPAD(TM) (PWP) packages. Suggested resale pricing of the UCC27223 device with Enable in quantities of 1,000 units is $1.25. TI's new VIP online selection tool, evaluation modules, user guides and application notes on Predictive Gate Drive and predictive, synchronous buck drivers are currently available at power.ti.com.

Texas Instruments Incorporated provides innovative DSP and analog technologies to meet our customers' real world signal processing requirements. In addition to Semiconductor, the company's businesses include Sensors & Controls, and Educational & Productivity Solutions. TI is headquartered in Dallas, Texas, and has manufacturing, design or sales operations in more than 25 countries.

Texas Instruments is traded on the New York Stock Exchange under the symbol TXN. More information is located on the World Wide Web at www.ti.com.

TI Developer Conference

System design engineers who design with TI's power management devices are welcome to attend the upcoming TI Developer Conference (TIDC), Feb. 18-20 in Houston. The conference will focus on learning through peer-to-peer, hands-on interaction with the latest advancements in high-performance analog and digital signal processing technology for video, imaging, control, telecom, audio and security applications. Online registration for the TI Developer Conference is available through www.ti.com/tidc04mr.

Trademarks

Predictive Gate Drive, PowerPAD and TrueDrive are trademarks of Texas Instruments.

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