PROTECTED QUAD POWER DRIVERS Providing improved output current li

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PROTECTED QUAD POWER DRIVERS Providing improved output current li

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PROTECTED QUAD POWER DRIVERS
PROTECTED QUAD POWER DRIVERS
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
UDx2549B
OUT4 OUT3 GROUND GROUND OUT2 OUT1 ENABLE GROUND GROUND
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
*Outputs peak current limited approximately driver. Circuit Description Applications further information.
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
Always order complete part number: prefix indicate operating temperature range basic four-digit part number suffix indicate package style, e.g., UDK2549EB
PROTECTED QUAD POWER DRIVERS
FUNCTIONAL BLOCK DIAGRAM
Channels)
ENABLE THERMAL LIMIT
OUTN
Dwg. FP-041
UDx2549EB
CONNECTION
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
ENABLE
OUT2
OUT1
GROUND GROUND
6°C/W
GROUND
SUFFIX 'EB', 36°C/W
GROUND
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, 1995, Allegro MicroSystems, Inc.
PROTECTED QUAD POWER DRIVERS
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. inputs simultaneously, other tests performed with each input tested separately.
PROTECTED QUAD POWER DRIVERS
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. fault condition corrected, output stage will return normal saturated condition.
Dwg. WP-008
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 TRIP
TIME
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
PROTECTED QUAD POWER DRIVERS
UDN2549B UDQ2549B Dimensions Inches
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 (Based 25.4
NOTE
0.508 0.204
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.
PROTECTED QUAD POWER DRIVERS
UDN2549EB UDQ2549EB Dimensions Inches
0.013 0.021 0.219 0.191
0.050
0.026 0.032 0.456 0.450 0.495 0.485
INDEX AREA
0.219 0.191
0.020
0.165 0.180
0.456 0.450 0.495 0.485
Dwg. MA-005-28A
Dimensions Millimeters (Based 25.4
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
PROTECTED QUAD POWER DRIVERS
PROTECTED QUAD POWER DRIVERS
POWER SINK DRIVERS SELECTION GUIDE
ORDER OUTPUT CURRENT, OUTPUT VOLTAGE, NUMBER DRIVERS
Output Ratings
Serial Latched
Features
Diode Saturated Internal Protection Input Drivers Clamp Outputs Hall Sensor/Driver Hall Sensor/Driver Dual 14-Line Decoder/Driver Hall Sensor/Driver Hall Sensor/Driver Stepper Motor Controller/Driver Microstepping Controller/Driver Stepper Motor Translator/Driver Stepper Motor Controller/Driver
Part Number
2595 5833 5832 7003 5140 2596 5275 5800 5801 5821 5841 5842 6817 2547 2549 2543 2559 2597 3625 3626 7024 7029 7042 5804 2064 2068 2065 2069 5829 2544 2540 7026 2878 2879
1000 1200 1250 1500 1600 1800 3000 4000
Current maximum specified test condition, voltage maximum rating. specification sustaining voltage limits over-current protection voltage limits. Complete part number includes additional characters indicate operating temperature range package style.
Allegro MicroSystems, Inc. reserves right make, from time time, such departures from detail specifications required permit improvements design products. Components made under military approvals will accordance with approval requirements. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties which result from use.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

PROTECTED QUAD POWER DRIVERS Providing improved output current li

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