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UCC2804-Q1 Datasheet Preview

UCC2804-Q1 Datasheet

PWM

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ą UCC2800/2801/2802/2803/2804/2805ĆQ1
LOWĆPOWER BICMOS CURRENTĆMODE PWM
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
SGLS121C − JULY 2002 − REVISED APRIL 2008
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
UCC2800
UCC2801
UCC2802
UCC2803
UCC2804
UCC2805
MAXIMUM DUTY CYCLE
100%
50%
100%
100%
50%
50%
REFERENCE VOLTAGE
5V
5V
5V
4V
5V
4V
TURN-ON THRESHOLD
7.2 V
9.4 V
12.5 V
4.1 V
12.5 V
4.1 V
TURN-OFF THRESHOLD
6.9 V
7.4 V
8.3 V
3.6 V
8.3 V
3.6 V
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 Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright 2008, Texas Instruments Incorporated
1




etcTI

UCC2804-Q1 Datasheet Preview

UCC2804-Q1 Datasheet

PWM

No Preview Available !

UCC2800/2801/2802/2803/2804/2805ĆQ1
LOWĆPOWER BICMOS CURRENTĆMODE PWM
SGLS121C − JULY 2002 − REVISED APRIL 2008
block diagram
FB COMP
21
VCC
OK
4V
REF
OK
0.5 V
Logic
Power
1.5 V
Overcurrent
SQ
R
SQ
R
REF/2
Full Cycle
Soft Start
= 4 ms
CS
3
Leading Edge
Blanking
UCCx801
UCCx804
UCCx805
Only
TQ
Oscillator
SQ
R
PWM
Latch 13.5 V
1V
8
REF
AVAILABLE OPTIONS{
TA
−40_C to 125_C
SOIC-8
SMALL OUTLINE}
(D)
UCC2800QDRQ1§
UCC2801QDRQ1§
UCC2802QDRQ1§
UCC2803QDRQ1§
UCC2804QDRQ1§
UCC2805QDRQ1§
{ 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 http://www.ti.com.
Package drawings, thermal data, and
symbolization are available at
http://www.ti.com/packaging.
§ The UCC280x−Q1 is only available taped and
reeled in quantities of 2500 devices per reel.
4
RC
D PACKAGE
(TOP VIEW)
COMP
FB
CS
RC
1
2
3
4
8 REF
7 VCC
6 OUT
5 GND
ą
7 VCC
6 OUT
5 GND
2 POST OFFICE BOX 655303 DALLAS, TEXAS 75265


Part Number UCC2804-Q1
Description PWM
Maker etcTI
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