UCC2802-Q1

Manufacturer Part NumberUCC2802-Q1
ManufacturerTexas Instruments
UCC2802-Q1 datasheet
 


Specifications of UCC2802-Q1

Control MethodCurrentDuty Cycle(max)(%)100
Frequency(max)(khz)1000Uvlo Thresholds On/off(v)12.5/8.3
Pin/package8SOICVin(min)(v)8.3
Regulated Outputs(#)1Operating Temperature Range(c)-40 to 125
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D
Qualified for Automotive Applications
D
ESD Protection Exceeds 200 V Using
Machine Model (C = 200 pF, R = 0)
D
100-µA Typical Starting Supply Current
D
500-µA Typical Operating Supply Current
D
Operation to 1 MHz
D
Internal Soft Start
D
Internal Fault Soft Start
description
The UCC2800/1/2/3/4/5 family of high-speed, low-power integrated circuits contain all of the control and drive
components required for off-line and dc-to-dc fixed frequency current-mode switching power supplies with
minimal parts count.
These devices have the same pin configuration as the UC2842/3/4/5 family and also offer the added features
of internal full-cycle soft start and internal leading-edge blanking of the current-sense input.
The UCC2800/1/2/3/4/5 family offers choice of maximum duty cycle and critical voltage levels. Lower reference
parts such as the UCC2803 and UCC2805 fit best into battery operated systems, while the higher reference
and the higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line
power supplies.
The UCC280xQDRQ1 series is specified for the automotive temperature range of −40_C to 125_C, and
qualified in accordance with AEC-Q100 stress test qualification for integrated circuits.
PART NUMBER
MAXIMUM DUTY CYCLE
UCC2800
100%
UCC2801
50%
UCC2802
100%
UCC2803
100%
UCC2804
50%
UCC2805
50%
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.
D
Internal Leading-Edge Blanking of the
Current Sense Signal
D
1-Amp Totem-Pole Output
D
70-ns Typical Response from
Current-Sense to Gate Drive Output
D
1.5% Tolerance Voltage Reference
D
Same Pinout as UC3842 and UC3842A
REFERENCE VOLTAGE
TURN-ON THRESHOLD
5 V
5 V
5 V
4 V
5 V
4 V
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
SGLS121C − JULY 2002 − REVISED APRIL 2008
TURN-OFF THRESHOLD
7.2 V
6.9 V
9.4 V
7.4 V
12.5 V
8.3 V
4.1 V
3.6 V
12.5 V
8.3 V
4.1 V
3.6 V
Copyright  2008, Texas Instruments Incorporated
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UCC2802-Q1 Summary of contents

  • Page 1

    ... The UCC2800/1/2/3/4/5 family offers choice of maximum duty cycle and critical voltage levels. Lower reference parts such as the UCC2803 and UCC2805 fit best into battery operated systems, while the higher reference and the higher UVLO hysteresis of the UCC2802 and UCC2804 make these ideal choices for use in off-line power supplies. ...

  • Page 2

    ... Soft Start Power 8 REF AVAILABLE OPTIONS { SOIC-8 SMALL OUTLINE } TA (D) UCC2800QDRQ1 § UCC2801QDRQ1 § UCC2802QDRQ1 § −40_C to 125_C −40_C to 125_C UCC2803QDRQ1 § UCC2804QDRQ1 § UCC2805QDRQ1 § { For the most current package and ordering information, see the Package Addendum at the end of this document, or see the TI web site at http://www.ti.com. ‡ ...

  • Page 3

    Ordering Information UCC2 absolute maximum ratings over operating free-air temperature range (unless otherwise noted voltage . . . . . . . . . . . . . . . . . . . ...

  • Page 4

    SGLS121C − JULY 2002 − REVISED APRIL 2008 electrical characteristics T = −40_C to 125_C RC 330 pF from RC to GND, 0.1-F capacitor from V GND and (unless otherwise stated ...

  • Page 5

    ... V CC internal zener voltage minus start threshold voltage NOTES: 1. Adjust V CC above the start threshold before setting Oscillator frequency for the UCC2800, UCC2802 and UCC2803 is the output frequency. Oscillator frequency for the UCC2801, UCC2804 and UCC2805 is twice the output frequency. DV COMP 3 ...

  • Page 6

    SGLS121C − JULY 2002 − REVISED APRIL 2008 detailed terminal descriptions COMP COMP is the output of the error amplifier and the input of the PWM comparator. Unlike other devices, the error amplifier in the UCC2800 family is a true, ...

  • Page 7

    the oscillator timing pin. For fixed frequency operation, set timing capacitor charging current by connecting a resistor from REF to RC. Set frequency by connecting timing capacitor from RC to GND. For the best ...

  • Page 8

    SGLS121C − JULY 2002 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION Oscillator REF The UCC3800/1/2/3/4/5 oscillator generates a sawtooth waveform on RC. The rise time is set by the ...

  • Page 9

    UCC1803/05 Oscillator Frequency vs R and Figure 5 UCC1801/04/05 Maximum Duty Cycle vs Oscillator Frequency Figure 7 POST OFFICE BOX 655303 SGLS121C − JULY 2002 − REVISED APRIL 2008 UCC1800/02/03 Maximum Duty Cycle vs Oscillator Frequency Figure ...

  • Page 10

    SGLS121C − JULY 2002 − REVISED APRIL 2008 UCC1805 Oscillator Frequency Figure 9 COMP to CS Offset vs Temperature Figure 100 kW T • POST OFFICE BOX 655303 DALLAS, ...

  • Page 11

    ... In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold Customer on an annual basis. OTHER QUALIFIED VERSIONS OF UCC2800-Q1, UCC2801-Q1, UCC2802-Q1, UCC2803-Q1, UCC2804-Q1, UCC2805-Q1 : • Catalog: UCC2800, UCC2801, UCC2802, UCC2803, UCC2804, • ...

  • Page 12

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  • Page 13

    ... Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’ ...