UCC28C41-Q1 Datasheet, PDF (1/20 Pages) Texas Instruments – BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS

UCC28C41-Q1, UCC28C43-Q1, UCC28C45-Q1
www.ti.com
SLUSA12 – DECEMBER 2009
BiCMOS LOW-POWER CURRENT-MODE PWM CONTROLLERS
Check for Samples: UCC28C41-Q1 UCC28C43-Q1 UCC28C45-Q1
FEATURES
1
• Qualified for Automotive Applications
• Enhanced Replacements for UC2842A Family
With Pin-to-Pin Compatibility
• 1-MHz Operation
• 50-μA Standby Current, 100-μA Maximum
• 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
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, a lower startup voltage versions of 7 V is offered as 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 the 8-pin SOIC (D) package.
T_A
–40°C to 125°C
MAXIMUM
DUTY CYCLE
100%
50%
ORDERING INFORMATION⁽¹⁾
UVLO ON/OFF
PACKAGE ⁽²⁾
8.4 V / 7.6 V
8.4 V / 7.6 V SOIC – D
Reel of 2500
ORDERABLE
PART NUMBER
UCC28C43QDRQ1 ⁽³⁾
UCC28C45QDRQ1 ⁽³⁾
7.0 V / 6.6 V
UCC28C41QDRQ1
TOP-SIDE
MARKING
PREVIEW
PREVIEW
28C41Q
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(3) Product Preview
1
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PRODUCTION DATA information current as of publication date.
Products conform to specifications per the terms of Texas
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Copyright © 2009, Texas Instruments Incorporated