OUT4 OUT3 GROUND GROUND OUT2 OUT1 ENABLE GROUND GROUND PROTECTED

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OUT4 OUT3 GROUND GROUND OUT2 OUT1 ENABLE GROUND GROUND PROTECTED

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UDx2549B (DIP)
OUT4 OUT3 GROUND GROUND OUT2 OUT1 ENABLE GROUND GROUND
PROTECTED QUAD POWER DRIVER
Providing improved output current limiting, UDK/UDN/ UDQ2549B UDK/UDN/UDQ2549EB quad power drivers combine logic gates high-current bipolar outputs with complete output protection. Each four outputs will sink state. outputs have minimum breakdown voltage (load dump) sustaining voltage inputs compatible with CMOS logic systems. Over-current protection each channel been designed into these devices activated approximately protects each output from short circuits with supply voltages When output current trip point reached, that output stage driven linearly resulting reduced output current level. over-current short circuit condition continues, thermal limiting circuits will first sense rise junction temperature then rise chip temperature, further decreasing output current. Under worst-case conditions, devices this family will tolerate short-circuits outputs, simultaneously. These devices used drive various loads including incandescent lamps (without warming limiting resistors) inductive loads such relays, solenoids, stepping motors. suffix devices 16-pin power DIPs while suffix `EB' devices 28-lead power PLCCs surface-mount applications. Both packages batwing construction provide maximum package power dissipation.
Data Sheet 29317.8
Dwg. PP-017-1
ABSOLUTE MAXIMUM RATINGS 25°C
Output Voltage, VOUT Over-Current Protected Output Voltage, VOUT Output Current, IOUT Supply Voltage, Input Voltage, Package Power Dissipation, Graph Operating Temperature Range, Prefix `UDK' -40°C +125°C Prefix `UDN' -20°C +85°C Prefix `UDQ' -40°C +85°C Storage Temperature Range, -55°C +150°C
FEATURES
Output Current Channel Independent Over-Current Protection Each Driver Thermal Protection Device Each Driver Output-Saturation Voltage Integral Output Flyback Diodes CMOS Compatible Inputs Pin-Compatible With UDN2543B/EB
*Outputs peak current limited approximately driver. Circuit Description Applications further information.
Always order complete part number: prefix indicate operating temperature range basic four-digit part number suffix indicate package style, e.g., UDK2549EB
2549 PROTECTED QUAD POWER DRIVER
FUNCTIONAL BLOCK DIAGRAM
Channels)
ENABLE THERMAL LIMIT
OUTN
Dwg. FP-041
UDx2549EB (PLCC)
CONNECTION
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
ENABLE
OUT2
OUT1
6°C/W
GROUND GROUND GROUND GROUND
SUFFIX 'EB',
36°C/W
SUFFIX 'B', 43°C/W
CONNECTION
SUPPLY
TEMPERATURE
Dwg. PP-019-1
Dwg. GP-004-1A
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1991, 2003 Allegro MicroSystems, Inc.
2549 PROTECTED QUAD POWER DRIVER
ELECTRICAL CHARACTERISTICS +25°C (prefix `UDN') over operating temperature range (prefix `UDK' `UDQ'), 4.75 5.25
Limits Characteristic Output Leakage Current Symbol ICEX Test Conditions VOUT VOUT Output Sustaining Voltage Output Saturation Voltage VOUT(SUS) VOUT(SAT) IOUT IOUT IOUT IOUT Over-Current Trip Input Voltage ITRIP Logic Logic Input Current Logic Logic Total Supply Current VIN(1) VEN(1) VIN(0) VEN(0) VIN(1) VEN(1) VIN(0) VEN(0) IOUT VIN* Outputs Clamp Diode Forward Voltage Clamp Diode Leakage Current Thermal Limit Min. Typ. <1.0 <1.0 Max. Units
Typical Data design information only. Negative current defined coming (sourcing) specified terminal. used here, -100 defined greater than (absolute magnitude convention) minimum implicitly zero. inputs simultaneously, other tests performed with each input tested separately.
www.allegromicro.com
2549 PROTECTED QUAD POWER DRIVER
TYPICAL OUTPUT CHARACTERISTIC CIRCUIT DESCRIPTION APPLICATION
INCANDESCENT LAMP DRIVER High incandescent lamp turn-ON/in-rush currents contribute poor lamp reliability destroy semiconductor lamp drivers. Warming current-limiting resistors protect both driver lamp significant power either when lamp when lamp respectively. Lamps with steady-state current ratings driven these devices without need warming (parallel) current-limiting (series) resistors. When incandescent lamp initially turned cold filament minimum resistance would normally allow in-rush current. With these drivers, during turn-ON, high in-rush current sensed internal low-value sense resistor. Drive current output stage then diverted shunting transistor, load current momentarily limited approximately During this short transition period, output current reduced value dependent supply voltage filament resistance. During lamp warmup, filament resistance increases maximum value, output stage goes into saturation applies maximum rated voltage lamp. INDUCTIVE LOAD DRIVER Bifilar (unipolar) stepper motors, relays, solenoids driven directly. internal flyback diodes prevent damage output transistors suppressing high-voltage spikes which occur when turning inductive load. rapid current decay (fast turn-OFF speeds), Zener diodes will raise flyback voltage improve performance. However, peak voltage must exceed specified minimum sustaining voltage (VSUPPLY VOUT(SUS)). FAULT CONDITIONS event shorted load, load current will attempt increase. described above, drive current affected output stage reduced, causing output stage linear, limiting peak output current approximately power dissipation that output stage increases, thermal gradient sensing circuit will become operational, further decreasing drive current affected output stage reducing output current value dependent supply voltage load resistance. Continuous multiple overload conditions causing chip temperature reach approximately 165°C will result additional reduction output current maintain safe level.
TIME
150°C
SCALE
OUTPUT VOLTAGE,
165°C
JUNCTION TEMP. LIMIT
THERMAL GRADIENT SENSING OUT(SAT)
TRIP
OUTPUT CURRENT,
Dwg. GP-013
TYPICAL OUTPUT BEHAVIOR
NORMAL LAMP IN-RUSH CURRENT
SCALE
LAMP CURRENT
THERMAL GRADIENT SENSING CURRENT LIMIT ITRIP
Dwg. WP-008
fault condition corrected, output stage will return normal saturated condition.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2549 PROTECTED QUAD POWER DRIVER
UDN2549B UDQ2549B
Dimensions Inches (controlling dimensions)
NOTE
0.020 0.008
0.430 0.280 0.240
0.300
0.070 0.045
0.100 0.775 0.735
0.005
0.210
0.015
0.150 0.115 0.022 0.014
Dwg. MA-001-17A
Dimensions Millimeters (for reference only)
0.508 0.204
NOTE
10.92 7.11 6.10
7.62
1.77 1.15
2.54 19.68 18.67
0.13
5.33
0.39
3.81 2.93 0.558 0.356
Dwg. MA-001-17A
NOTES:
Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative Lead thickness measured seating plane below. Webbed lead frame. Leads internally piece.
www.allegromicro.com
2549 PROTECTED QUAD POWER DRIVER
UDN2549EB UDQ2549EB
Dimensions Inches (controlling dimensions)
0.013 0.021 0.219 0.191
0.026 0.032 0.456 0.450
INDEX AREA
0.050 0.219 0.191
0.495 0.485
0.020
0.165 0.180
0.456 0.450 0.495 0.485
Dwg. MA-005-28A
Dimensions Millimeters (for reference only)
0.331 0.533 5.56 4.85
1.27
0.812 0.661 11.58 11.43 12.57 12.32
INDEX AREA
5.56 4.85
0.51
4.57 4.20
11.582 11.430 12.57 12.32
Dwg. MA-005-28A
NOTES: Exact body lead configuration vendor's option within limits shown. Lead spacing tolerance non-cumulative Webbed lead frame. Leads through through internally piece.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2549 PROTECTED QUAD POWER DRIVER
products described here manufactured under more U.S. patents U.S. patents pending. Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements performance, reliability, manufacturability products. Before placing order, user cautioned verify that information being relied upon current. Allegro products authorized critical components life-support devices systems without express written approval. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringement patents other rights third parties which result from use.
www.allegromicro.com

OUT4 OUT3 GROUND GROUND OUT2 OUT1 ENABLE GROUND GROUND PROTECTED

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