Qualification Accordance With AEC-Q100 Qualified Automotive Applicatio

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LOW-POWER BICMOS CURRENT-MODE
Qualification Accordance With AEC-Q100 Qualified Automotive Applications Customer-Specific Configuration Control Supported Along With Major-Change Approval Protection Exceeds Using Machine Model Typical Starting Supply Current Typical Operating Supply Current
Contact factory details. Q100 qualification data available request.
Operation 1MHz Internal Soft Start Internal Fault Soft Start Internal Leading-Edge Blanking Current Sense Signal Totem-Pole Output Typical Response from Current-Sense Gate Drive Output 1.5% Tolerance Voltage Reference Same Pinout UC3842 UC3842A
description
UCC2800/1/2/3/4/5 family high-speed, low-power integrated circuits contain control drive components required off-line DC-to-DC fixed frequency current-mode switching power supplies with minimal parts count. These devices have same configuration UC2842/3/4/5 family, also offer added features internal full-cycle soft start internal leading-edge blanking current-sense input. UCC2800/1/2/3/4/5 family offers choice maximum duty cycle critical voltage levels. Lower reference parts such UCC2803 UCC2805 best into battery operated systems, while higher reference higher UVLO hysteresis UCC2802 UCC2804 make these ideal choices off-line power supplies. UCC280xQDRQ1 series specified automotive temperature range -40_C 125_C, qualified accordance with AEC-Q100 stress test qualification integrated circuits.
PART NUMBER UCC2800 UCC2801 UCC2802 UCC2803 UCC2804 UCC2805 MAXIMUM DUTY CYCLE 100% 100% 100% REFERENCE VOLTAGE TURN-ON THRESHOLD 12.5 12.5 TURN-OFF THRESHOLD
Please aware that important notice concerning availability, standard warranty, critical applications Texas Instruments semiconductor products disclaimers thereto appears this data sheet.
PRODUCTION DATA information current publication date. Products conform specifications terms Texas Instruments standard warranty. Production processing does necessarily include testing parameters.
Copyright 2002 2003, Texas Instruments Incorporated
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block diagram
AVAILABLE OPTIONS SOIC-8 SMALL OUTLINE UCC2800QDRQ1 UCC2801QDRQ1 -40_C 125_C UCC2802QDRQ1 UCC2803QDRQ1 UCC2804QDRQ1 UCC2805QDRQ1 UCC280x-Q1 only available taped reeled quantities 2500 devices reel.
PACKAGE (TOP VIEW)
COMP
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Ordering Information
UCC2 Q100 INDICATOR TAPE REEL INDICATOR PACKAGE Plastic SOIC AUTOMOTIVE TEMPERATURE RANGE INDICATOR PRODUCT OPTION through
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
voltage current Output current, Output energy, (Capacitive Load) Analog Inputs (FB, -0.3 Power Dissipation +25_C package) 0.65 Storage temperature range, Tstg -65_C 150_C Lead temperature soldering (1/16 inch) from case seconds 300_C
Stresses beyond those listed under "absolute maximum ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated under "recommended operating conditions" implied. Exposure absolute-maximum-rated conditions extended periods affect device reliability. Unless otherwise indicated, voltages reference ground currents positive into negative specified terminals.
normal operation powered through current limiting resistor. Absolute maximum applies when driven from impedance source such that does exceed (which includes gate drive current requirement).
electrical characteristics -40_C 125_C, (see Note from from GND, capacitor from GND, capacitor from VREF (unless otherwise stated)
PARAMETER Reference Section Output voltage Load regulation voltage Line regulation voltage 25_C clamp Note kHz, Note 1000 hours, Note 25_C -40_C 125_C UCC2800/01/02/04 Total variation voltage Output noise voltage Long term stability Output short-circuit current UCC2803/05 25_C 125_C 4.88 UCC2800/01/02/04 UCC2803/05 4.925 3.94 5.075 4.06 4.08 mV/V TEST CONDITIONS UNITS
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electrical characteristics -40_C 125_C, (see Note from from GND, capacitor from GND, capacitor from VREF (unless otherwise stated)
PARAMETER Oscillator Section UCC2800/01/02/04 Oscillator frequency Temperature stability Amplitude peak-to-peak Oscillator peak voltage Error Amplifier Section COMP Input voltage Input bias current Open loop voltage gain COMP sink current COMP source current Gain bandwidth product Section UCC2800/02/03 Maximum duty cycle Minimum duty cycle Current Sense Section Gain Maximum input signal Input bias current blank time Over-current threshold voltage COMP offset voltage Output Section (OUT) IOUT Low-level level output voltage IOUT IOUT IOUT IOUT High-level output voltage VSAT (VCC OUT) Rise time Fall time IOUT -200 IOUT parts parts UCC2803/05 parts parts parts UCC2803/05 0.35 0.15 0.15 Note COMP Note -200 1.42 0.45 1.55 1.65 1.68 1.35 COMP UCC2801/04/05 Note COMP COMP COMP UCC2800/01/02/04 UCC2803/05 2.44 1.95 -0.2 -0.5 -0.8 2.56 2.05 Note Note 2.25 UCC2803/05 2.45 2.55 TEST CONDITIONS UNITS
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electrical characteristics -40_C 125_C, (see Note from from GND, capacitor from GND, capacitor from VREF (unless otherwise stated)
PARAMETER Undervoltage Lockout Section UCC2800 UCC2801 Start threshold Note UCC2802/04 UCC2803/05 UCC2800 UCC2801 Stop threshold Note UCC2802/04 UCC2803/05 UCC2800 UCC2801 Start stop hysteresis UCC2802/04 UCC2803/05 Soft Start Section COMP rise time Overall Section Start-up current Operating supply current internal zener voltage internal zener voltage minus start threshold voltage Start Threshold Note Notes UCC2802/04 13.5 Rise from 11.5 0.12 12.5 10.2 13.5 0.48 TEST CONDITIONS UNITS
NOTES: Adjust above start threshold before setting Oscillator frequency UCC2800, UCC2802 UCC2803 output frequency. Oscillator frequency UCC2801, UCC2804 UCC2805 twice output frequency. Gain defined DVCOMP DVCS Parameter measured trip point latch with Total Variation includes temperature stability load regulation. Start Threshold, Stop Threshold Zener Shunt Thresholds track another. production tested. device fully operating clamp mode forcing current higher than normal operating supply current.
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detailed terminal descriptions
COMP COMP output error amplifier input comparator. Unlike other devices, error amplifier UCC2800 family true, output-impedance, operational amplifier. such, COMP terminal both source sink current. However, error amplifier internally current limited, that command zero duty cycle externally forcing COMP GND. UCC2800 family features built-in full cycle Soft Start. Soft Start implemented clamp maximum COMP voltage. input current sense comparators. UCC2800 family different current sense comparators: comparator over-current comparator. UCC2800 family contains digital current sense filtering, which disconnects terminal from current sense comparator during interval immediately following rising edge pin. This digital filtering, also called leading-edge blanking, means that most applications, analog filtering filter) required Compared external filter technique, leading-edge blanking provides smaller effective propagation delay. Note, however, that minimum non-zero On-Time signal directly affected leading-edge-blanking propagation delay. over-current comparator only intended fault sensing, exceeding over-current threshold will cause soft start cycle. inverting input error amplifier. best stability, keep lead length short possible stray capacitance small possible. ground (GND) reference ground power ground functions this part. output high-current power driver capable driving gate power MOSFET with peak currents exceeding actively held when below UVLO threshold.
high-current power driver consists output devices, which switch output stage also provides very impedance overshoot undershoot. This means that many cases, external schottky clamp diodes required.
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detailed descriptions (continued)
oscillator timing pin. fixed frequency operation, timing capacitor charging current connecting resistor from frequency connecting timing capacitor from GND. best perfomance, keep timing capacitor lead short direct possible. possible, separate ground traces timing capacitor other functions. frequency oscillation estimated with following equations:
R1.5C UCC2803 UCC2805
UCC2800 where frequency resistance ohms, capacitance farads. recommended range timing resistors between 200k timing capacitor 1000 Never timing resistor less than 10k. prevent noise problems, bypass with ceramic capacitor close possible. electrolytic capacitor also used addition ceramic capacitor. voltage reference (REF) voltage reference error amplifier also many other functions also used logic power supply high speed switching logic When greater than less than UVLO threshold, pulled ground through resistor. This means that used logic output indicating power system status. important reference stability that bypassed with ceramic capacitor close possible. electrolytic capacitor also used addition ceramic capacitor. minimum ceramic required. Additional bypassing required external loads greater than reference. prevent noise problems with high speed switching transients, bypass ground with ceramic capacitor very close package. power (VCC) power input connection this device. normal operation powered through current limiting resistor. Although quiescent current very low, total supply current will higher, depending current. Total current quiescent current average current. Knowing operating frequency MOSFET gate charge (Qg), average current calculated from:
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PARAMETER MEASUREMENT INFORMATION
Oscillator Error Amplifier Gain/Phase Response
UCC3800/1/2/3/4/5 oscillator generates sawtooth waveform rise time time constant fall time internal transistor on-resistance approximately 125. During fall time, output maximum duty cycle reduced below 100% depending part number. Larger timing capacitors increase discharge time reduce maximum duty cycle frequency.
Figure
UCC1803/05 VREF VCC; ILOAD
Figure
UCC1800/01/02/04 Oscillator Frequency
Figure
Figure
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UCC1803/05 Oscillator Frequency
UCC1800/02/03 Maximum Duty Cycle Oscillator Frequency
Figure
UCC1801/04/05 Maximum Duty Cycle Oscillator Frequency
Figure
UCC1800 Oscillator Frequency
Figure
Figure
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UCC1805 Oscillator Frequency
Dead Time 100k
Figure
COMP Offset Temperature,
Figure
Figure
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MECHANICAL DATA
(R-PDSO-G**)
PINS SHOWN 0.050 (1,27) 0.020 (0,51) 0.014 (0,35) 0.010 (0,25)
PLASTIC SMALL-OUTLINE PACKAGE
0.244 (6,20) 0.228 (5,80) 0.157 (4,00) 0.150 (3,81)
0.008 (0,20)
Gage Plane 0.044 (1,12) 0.016 (0,40)
0.010 (0,25)
Seating Plane 0.069 (1,75) 0.010 (0,25) 0.004 (0,10) 0.004 (0,10)
PINS
0.197 (5,00) 0.189 (4,80)
0.344 (8,75) 0.337 (8,55)
0.394 (10,00) 0.386 (9,80)
4040047/E 09/01 NOTES: linear dimensions inches (millimeters). This drawing subject change without notice. Body dimensions include mold flash protrusion, exceed 0.006 (0,15). Falls within JEDEC MS-012
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