PDF《UCC28C4x-EP》

FEATURES APPLICATIONS DESCRIPTION UCC28C4x-EP BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS SGLS352BCDECEMBER 2006CREVISED MAY

2007 ? Low Operating Current of 2.

3 mA at

52 kHz ? Controlled Baseline ? Fast

35 ns Cycle-by-Cycle Overcurrent Limiting C One Assembly/Test Site, One Fabrication Site ? ±1 A Peak Output Current C Extended Temperature Performance of ? Rail-to-Rail Output Swings With

25 ns Rise C55°C to 125°C and

20 ns Fall Times ? Enhanced Diminishing Manufacturing Sources ? ±1% Initial Trimmed 2.5 V Error Amplifier (DMS) Support Reference ? Enhanced Product-Change Notification ? Trimmed Oscillator Discharge Current ? Qualification Pedigree (1) ? New Undervoltage Lockout Versions ? Enhanced Replacements for UC2842A Family ? MSOP-8 Package Minimizes Board Space With Pin-to-Pin Compatibility ?

1 MHz Operation ? Switch Mode Power Supplies ?

50 ?A Standby Current,

100 ?A Maximum ? DC-to-DC Converters (1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an ? Board Mount Power Modules extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits. The UCC28C4x family are high performance current mode PWM controllers. They are enhanced BiCMOS versions with pin-for-pin compatibility to the industry standard UC284xA family and UC284x family of PWM controllers. In addition, lower startup voltage versions of

7 V are offered as UCC28C40 and UCC28C41. Providing necessary features to control fixed frequency, peak current mode power supplies, this family offers several performance advantages. These devices offer high frequency operation up to

1 MHz with low start up and operating currents, thus minimizing start up loss and low operating power consumption for improved efficiency. The devices also feature a fast current sense to output delay time of

35 ns, and a ±1 A peak output current capability with improved rise and fall times for driving large external MOSFETs directly. The UCC28C4x family is offered in 8-pin package SOIC (D). Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright ? 2006C2007, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. UCC28C4x-EP BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS SGLS352BCDECEMBER 2006CREVISED MAY

2007 AVAILABLE OPTIONS SOIC-8 MAXIMUM UVLO TA SMALL OUTLINE DUTY CYCLE ON/OFF (D)(1) 14.5 V/9 V UCC28C42MDREP(2) 100% 8.4 V/7.6 V UCC28C43MDREP

7 V/6.6 V UCC28C40MDREP(2) C55°C to 125°C 14.5 V/9 V UCC28C44MDREP(2) 50% 8.4 V/7.6 V UCC28C45MDREP

7 V/6.6 V UCC28C41MDREP(2) (1) D (SOIC-8) packages are available taped and reeled. Add R suffix to device type (e.g., UCC28C42DREP) to order quantities of

2500 devices per reel. Tube quantities are

75 for D packages (SOIC-8). (2) Product Preview FUNCTIONAL BLOCK DIAGRAM

2 Submit Documentation Feedback Absolute Maximum Ratings(1)(2) Dissipation Ratings Recommended Operating Conditions UCC28C4x-EP BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS SGLS352BCDECEMBER 2006CREVISED MAY