UCC28C45-EP_15 Datasheet, PDF (1/23 Pages) Texas Instruments – BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS

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UCC28C4x-EP
BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS
SGLS352B – DECEMBER 2006 – REVISED MAY 2007
FEATURES
• Controlled Baseline
– One Assembly/Test Site, One Fabrication
Site
– Extended Temperature Performance of
–55°C to 125°C
• Enhanced Diminishing Manufacturing Sources
(DMS) Support
• Enhanced Product-Change Notification
• Qualification Pedigree ⁽¹⁾
• Enhanced Replacements for UC2842A Family
With Pin-to-Pin Compatibility
• 1 MHz Operation
• 50 µA Standby Current, 100 µA Maximum
(1) Component qualification in accordance with JEDEC and
industry standards to ensure reliable operation over an
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.
• Low Operating Current of 2.3 mA at 52 kHz
• Fast 35 ns Cycle-by-Cycle Overcurrent
Limiting
• ±1 A Peak Output Current
• Rail-to-Rail Output Swings With 25 ns Rise
and 20 ns Fall Times
• ±1% Initial Trimmed 2.5 V Error Amplifier
Reference
• Trimmed Oscillator Discharge Current
• New Undervoltage Lockout Versions
• MSOP-8 Package Minimizes Board Space
APPLICATIONS
• Switch Mode Power Supplies
• DC-to-DC Converters
• Board Mount Power Modules
DESCRIPTION
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.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2006–2007, Texas Instruments Incorporated