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SGLS121C − JULY 2002 − REVISED APRIL 2008

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

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

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

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 REFERENCE VOLTAGE TURN-ON THRESHOLD TURN-OFF THRESHOLD

UCC2800 100% 5 V 7.2 V 6.9 V

UCC2801 50% 5 V 9.4 V 7.4 V

UCC2802 100% 5 V 12.5 V 8.3 V

UCC2803 100% 4 V 4.1 V 3.6 V

UCC2804 50% 5 V 12.5 V 8.3 V

UCC2805 50% 4 V 4.1 V 3.6 V

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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.

Summary of content (17 pages)

PAGE 1
SGLS121C − JULY 2002 − REVISED APRIL 2008 D Qualified for Automotive Applications D ESD Protection Exceeds 200 V Using D D D D D D Internal Leading-Edge Blanking of the D D Machine Model (C = 200 pF, R = 0) 100-µA Typical Starting Supply Current 500-µA Typical Operating Supply Current Operation to 1 MHz Internal Soft Start Internal Fault Soft Start D D Current Sense Signal 1-Amp Totem-Pole Output 70-ns Typical Response from Current-
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SGLS121C − JULY 2002 − REVISED APRIL 2008 block diagram VCC OK FB COMP CS 2 1 3 Leading Edge Blanking 1.5 V Overcurrent 7 VCC UCCx801 UCCx804 UCCx805 Only REF/2 TQ S Q R 4V Oscillator 6 OUT S Q S Q R REF OK PWM Latch R 0.5 V 13.
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SGLS121C − JULY 2002 − REVISED APRIL 2008 Ordering Information UCC2 80 0 Q D R Q1 Q100 INDICATOR TAPE and REEL INDICATOR PACKAGE D = Plastic SOIC AUTOMOTIVE TEMPERATURE RANGE INDICATOR PRODUCT OPTION 0 through 5 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡ VCC voltage w . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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SGLS121C − JULY 2002 − REVISED APRIL 2008 electrical characteristics TA = −40_C to 125_C, VCC = 10 V (see Note 1), RT = 100 kΩ from REF to RC, CT = 330 pF from RC to GND, 0.1-F capacitor from VCC to GND, 0.
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SGLS121C − JULY 2002 − REVISED APRIL 2008 electrical characteristics TA = −40_C to 125_C, VCC = 10 V (see Note 1), RT = 100 kΩ from REF to RC, CT = 330 pF from RC to GND, 0.1-F capacitor from VCC to GND, 0.
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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, low output-impedance, 2-MHz operational amplifier. As such, the COMP terminal can both source and sink current.
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SGLS121C − JULY 2002 − REVISED APRIL 2008 detailed descriptions (continued) RC RC is 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 perfomance, keep the timing capacitor lead to GND as short and direct as possible.
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SGLS121C − JULY 2002 − REVISED APRIL 2008 PARAMETER MEASUREMENT INFORMATION Error Amplifier Gain/Phase Response Oscillator REF 8 0.2 V R Q RT S RC 2.5 V 4 CT The UCC3800/1/2/3/4/5 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.
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SGLS121C − JULY 2002 − REVISED APRIL 2008 UCC1803/05 Oscillator Frequency vs RT and CT UCC1800/02/03 Maximum Duty Cycle vs Oscillator Frequency Figure 5 Figure 6 UCC1801/04/05 Maximum Duty Cycle vs Oscillator Frequency UCC1800 ICC vs Oscillator Frequency Figure 7 Figure 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9
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SGLS121C − JULY 2002 − REVISED APRIL 2008 Dead Time vs CT UCC1805 ICC vs Oscillator Frequency RT = 100 kW Figure 10 Figure 9 COMP to CS Offset vs Temperature CS = 0 V Figure 11 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com 18-Oct-2013 (6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish value exceeds the maximum column width. Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided.
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PACKAGE MATERIALS INFORMATION www.ti.com 8-Apr-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 UCC2800QDRQ1 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 UCC2801QDRQ1 SOIC D 8 2500 330.0 12.4 6.4 5.2 2.1 8.0 12.0 Q1 UCC2802QDRQ1 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 8-Apr-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) UCC2800QDRQ1 SOIC D 8 2500 367.0 367.0 35.0 UCC2801QDRQ1 SOIC D 8 2500 367.0 367.0 35.0 UCC2802QDRQ1 SOIC D 8 2500 367.0 367.0 35.0 UCC2803QDRQ1 SOIC D 8 2500 367.0 367.0 35.0 UCC2804QDRQ1 SOIC D 8 2500 367.0 367.0 35.0 UCC2805QDRQ1 SOIC D 8 2500 367.0 367.0 35.
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