Protected Quad Driver Date status change: October 2005 Recom

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Protected Quad Driver Date status change: October 2005 Recom

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A2547
Protected Quad Driver
Date status change: October 2005
Recommended Substitutions:
NOTE: detailed information purchasing options, contact your local Allegro field applications engineer sales representative.
Allegro MicroSystems, Inc. reserves right make, from time time, revisions anticipated product life cycle plan product accommodate changes production capabilities, alternative product availabilities, market demand. information included herein believed accurate reliable. However, Allegro MicroSystems, Inc. assumes responsibility use; infringements patents other rights third parties which result from use.
2547
UDx2547B (DIP)
FAULT OUT1 OUT2 GROUND GROUND OUT3 CONNECT. OUT4 ENABLE GROUND GROUND SUPPLY
PROTECTED QUAD POWER DRIVER
Providing interface between low-level logic power loads, UDK/UDN/UDQ2547B UDK/UDN/UDQ2547EB 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 include internal pull-down resistors ensure that outputs remain inputs open-circuited. Over-current protection each channel been designed into these devices activated approximately protects each output from short circuits with supply voltages When maximum driver output current reached, that output drive reduced linearly, maintaining constant load current. over-current short circuit condition continues, each channel independent thermal limit circuit which will sense rise junction temperature turn individual channel that fault. Foldback circuitry decreases output current excessive voltage present across output assists keeping device within (safe operating area). Each output also includes diagnostics increased device protection. output shorted opened, diagnostics signal controlling circuitry through common FAULT pin. These devices used drive various resistive loads including incandescent lamps (without warming limiting resistors). With addition external output clamp diodes, they used drive 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 29317.4C*
Dwg. PP-018A
ABSOLUTE MAXIMUM RATINGS 25°C
Output Voltage, VOUT Over-Current Protected Output Voltage, VOUT Output Current, IOUT FAULT Output Voltage, 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 current limited approximately driver junction temperature limited current excess attempted. Circuit Description Application further information.
FEATURES
Output Protection Output-Saturation Voltage Diagnostic FAULT Output CMOS Compatible Inputs Independent Over-Current Protection Each Driver Independent Thermal Protection Each Driver Output Current Channel
Always order complete part number: prefix indicate operating temperature range basic four-digit part number suffix indicate package style, e.g., UDK2547EB
2547 PROTECTED QUAD POWER DRIVER
UDx2547EB (PLCC)
ALLOWABLE PACKAGE POWER DISSIPATION WATTS
OUT2 CONNECTION
FAULT
6°C/W
GROUND
FAULT GROUND GROUND
SUFFIX 'EB',
36°C/W
GROUND
SUFFIX 'B', 43°C/W
CONNECTION
CONNECTION
Dwg. GP-004-1A
SUPPLY
TEMPERATURE
ENABLE
OUT1
Dwg. PP-019
FUNCTIONAL BLOCK DIAGRAM
FAULT ABLE
COMMON CONTROL FOUR DRIVERS
THERMAL SHUTDOWN CURRENT LIMIT
OUTN
Dwg. FP-007
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright 1989, 2002 Allegro MicroSystems, Inc.
2547 PROTECTED QUAD POWER DRIVER
ELECTRICAL CHARACTERISTICS +25°C (prefix `UDN') over operating temperature range (prefix `UDK' `UDQ'), 4.75
Characteristic Output Leakage Current* Symbol IOUT Test Conditions VOUT VOUT Output Sustaining Voltage Output Saturation Voltage VOUT(SUS) VOUT(SAT) IOUT Open IOUT IOUT IOUT Over-Current Limit Input Voltage IOUT Logic Logic Input Current Logic Logic Fault Output Leakage Current Fault Output Current PulseTest, VOUT VIN(1) VEN(1) VlN(0) VEN(0) VIN(1) VEN(1) VIN(0) VEN(0) Driver Outputs Open, Fault Output Saturation Voltage Total Supply Current VF(SAT) Outputs Outputs Thermal Shutdown Thermal Hysteresis Min. Limits Typ. Max. <1.0 Units
Typical Data design information only. *Measurement includes input current other elements.
TRUTH TABLE
STATUS Normal Load ENABLE OUTN FAULT
Over-Current Short Supply Thermal Fault Open Load Short Ground
Don't care.
Linear drive, current limited.
2547 PROTECTED QUAD POWER DRIVER
CIRCUIT DESCRIPTION APPLICATION
NORMAL LAMP IN-RUSH CURRENT
SCALE
LAMP CURRENT
These devices monitor their outputs open shorted conditions. Both conditions sensed comparing input output states. Note that FAULT output operational only ENABLE input high. When fault condition sensed, FAULT output will state. external FAULT output filter capacitor (0.1µF) recommended eliminate erroneous switching. INCANDESCENT LAMP DRIVER
SHORT CIRCUIT CURRENT LIMIT
High incandescent lamp turn-ON/in-rush currents contribute poor lamp reliability destroy semiconductor lamp drivers. Warming (parallel) current-limiting (series) resistors protect both driver lamp significant power either when lamp when lamp respectively. Lamps with steady-state current ratings driven without need warming current-limiting resistors, lamp turn-ON time concern. 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 diverted shunting transistor, output stage operates linear mode, load current limited approximately During lamp warmup, filament resistance increases maximum value, output driver goes into saturation applies maximum rated voltage lamp. INDUCTIVE LOAD DRIVER With addition external clamp diodes, bifilar (unipolar) stepper motors other inductive loads driven directly. external diodes prevent damage output transistors suppressing high-voltage spikes that 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)). OVER-CURRENT CONDITIONS event shorted load, stalled motor, load current will attempt increase. described above, drive current affected output stage linearly reduced (limiting load current about causing output stage linear. junction temperature output stage increases, thermal shutdown circuit will shut affected output. fault condition corrected, output driver will return normal saturated condition.
THERMAL SHUTDOWN THERMAL HYSTERESIS
TIME
Dwg. WP-005A
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2547 PROTECTED QUAD POWER DRIVER
UDN2547B UDQ2547B
Dimensions Inches (controlling dimensions)
0.020 0.008
NOTE
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)
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.
2547 PROTECTED QUAD POWER DRIVER
UDN2547EB UDQ2547EB
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
2547 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.
2547 PROTECTED QUAD POWER DRIVER
POWER SINK DRIVERS
ORDER OUTPUT CURRENT, OUTPUT VOLTAGE, NUMBER DRIVERS
Output Ratings
Serial Input
Latched Drivers
Features Diode Clamp
Outputs
Internal Protection
Part Number
constant current 6275 constant current 6276 saturated 2595 5833 saturated 5832 addressable decoder/driver DMOS 6B259 DMOS 6B273 DMOS 6B595 constant current 6277 addressable decoder/driver DMOS 6259 DMOS 6273 DMOS 6595 saturated 2596 saturated 2557 5800 2003 2004 2803 5801 5821 5841 addressable decoder/driver DMOS 6A259 DMOS 6A595 5822 5842 2023 2024 dual 14-line decoder/driver 6817 saturated 2547 saturated 2549 2559 saturated 2543 saturated 2597 1000 stepper motor controller/driver 7024 7029 1200 microstepping controller/driver 7042 1250 stepper motor translator/driver 5804 1800 2540 3000 stepper motor controller/driver 7026 microstepping controller/driver 7044 4000 2878 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.
Northeast Cutoff, 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

Protected Quad Driver Date status change: October 2005 Recom

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