Datasheet

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REF

COMP

Voltage

Reference

REF

Logic

Power

0.5 V

VCC

4 V

1.5 V

Over Current

REF/2

Full Cycle

Soft Start

Oscillator

Leading Edge

Blanking

PWM

Latch

UCCx813-1

UCCx813-4

UCCx813-5

Only

13.5 V

τ=4ms

VCC

OUT

GND

UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5

UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5

www.ti.com

SLUS161D –APRIL 1999–REVISED JUNE 2013

Low-Power Economy BiCMOS Current-Mode PWM

Check for Samples: UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5, UCC3813-0, UCC3813-1, UCC3813-

2, UCC3813-3, UCC3813-4 , UCC3813-5

FEATURES

DESCRIPTION

The UCC3813-x family of high-speed, low-power

• 100-µA Typical Starting Supply Current

integrated circuits contain all of the control and drive

• 500-µA Typical Operating Supply Current

components required for off-line and DC-to-DC fixed-

• Operation to 1 MHz

frequency current-mode switching power supplies

with minimal parts count.

• Internal Soft Start

• Internal Fault Soft Start

These devices have the same pin configuration as

the UC384x family, and also offer the added features

• Internal Leading-Edge Blanking of the Current-

of internal full-cycle soft start and internal leading-

Sense Signal

edge blanking of the current-sense input.

• 1-A Totem-Pole Output

The UCC3813-x family offers a variety of package

• 70-ns Typical Response from Current-Sense to

options, temperature-range options, choice of

Gate-Drive Output

maximum duty cycle, and choice of critical voltage

• 1.5% Tolerance Voltage Reference

levels. Lower reference parts such as the UCC3813-3

and UCC38135 fit best into battery operated systems,

• Same Pinout as UCC3802, UC3842, and

while the higher reference and the higher UVLO

UC3842A

hysteresis of the UCC3813-2 and UCC3813-4 make

these ideal choices for use in off-line power supplies.

The UCC2813-x series is specified for operation from

–40°C to +85°C and the UCC3813-x series is

specified for operation from 0°C to 70°C.

BLOCK DIAGRAM

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.

Summary of content (26 pages)

PAGE 1
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 www.ti.
PAGE 2
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 SLUS161D – APRIL 1999 – REVISED JUNE 2013 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
PAGE 3
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 www.ti.com SLUS161D – APRIL 1999 – REVISED JUNE 2013 ELECTRICAL CHARACTERISTICS Unless otherwise stated, these specifications apply for –40°C ≤ TA ≤ +85°C for UCC2813-x; 0°C ≤ TA ≤ +70°C for UCC3813x; VCC = 10 V (1); RT = 100 k from REF to RC; CT = 330 pF from RC to GND; 0.1-µF capacitor from VCC to GND; 0.1-µF capacitor from VREF to GND. TA = TJ.
PAGE 4
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 SLUS161D – APRIL 1999 – REVISED JUNE 2013 www.ti.com ELECTRICAL CHARACTERISTICS (continued) Unless otherwise stated, these specifications apply for –40°C ≤ TA ≤ +85°C for UCC2813-x; 0°C ≤ TA ≤ +70°C for UCC3813x; VCC = 10 V(1); RT = 100 k from REF to RC; CT = 330 pF from RC to GND; 0.1-µF capacitor from VCC to GND; 0.1-µF capacitor from VREF to GND. TA = TJ.
PAGE 5
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 www.ti.
PAGE 6
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 SLUS161D – APRIL 1999 – REVISED JUNE 2013 www.ti.com RC: RC is the oscillator timing pin. For fixed frequency operation, set the timing-capacitor charging current by connecting a resistor from REF to RC. Set frequency by connecting a timing capacitor from RC to GND. For best performance, keep the timing capacitor lead to GND as short and direct as possible.
PAGE 7
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 www.ti.com SLUS161D – APRIL 1999 – REVISED JUNE 2013 APPLICATION INFORMATION REF 8 0.2 V + Q R _ RT + RC 2.5 V 4 S _ CT Figure 1. Oscillator The UCC3813-0/-1/-2/-3/-4/-5 oscillator generates a sawtooth waveform on RC. The rise time is set by the time constant of RT and CT. The fall time is set by CT and an internal transistor on-resistance of approximately 125 Ω.
PAGE 8
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 SLUS161D – APRIL 1999 – REVISED JUNE 2013 UCC3813-0/ -2 / -4 OSCILLATOR FREQUENCY vs RT AND CT 10 0p F 100 UCC3813-3 / -5 OSCILLATOR FREQUENCY vs RT AND CT 1000 Oscillator Freq. (kHz) 1000 Oscillator Freq. (kHz) www.ti.com 20 0p 33 F 0p F 100 10 0p F 20 0p F 33 0p 1n F 10 10 1n 10 100 1000 10 RT (kΩ) Figure 4. F 100 1000 RT (kΩ) Figure 5.
PAGE 9
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 www.ti.
PAGE 10
UCC2813-0, UCC2813-1, UCC2813-2, UCC2813-3, UCC2813-4, UCC2813-5 UCC3813-0, UCC3813-1, UCC3813-2, UCC3813-3, UCC3813-4, UCC3813-5 SLUS161D – APRIL 1999 – REVISED JUNE 2013 www.ti.com REVISION HISTORY Changes from Revision B (April 2008) to Revision C Page • Added Analog inputs RC and COMP in the ABSOLUTE MAXIMUM RATINGS Table ........................................................ 2 • Added clarification to Analog Inputs min-max range in the ABSOLUTE MAXIMUM RATINGS table ...........................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Aug-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant UCC2813DTR-0 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 UCC2813DTR-1 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 UCC2813DTR-2 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.
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PACKAGE MATERIALS INFORMATION www.ti.com 6-Aug-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) UCC2813DTR-0 SOIC D 8 2500 340.5 338.1 20.6 UCC2813DTR-1 SOIC D 8 2500 340.5 338.1 20.6 UCC2813DTR-2 SOIC D 8 2500 340.5 338.1 20.6 UCC2813DTR-3 SOIC D 8 2500 340.5 338.1 20.6 UCC2813DTR-4 SOIC D 8 2500 340.5 338.1 20.6 UCC2813DTR-5 SOIC D 8 2500 340.5 338.1 20.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.