2549

2549 ALLEGRO

Document overview

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Technical content

Providing improved output current limiting, the UDK/UDN/ UDQ2549B and UDK/UDN/UDQ2549EB quad power drivers combine AND logic gates and high-current bipolar outputs with complete output protection. Each of the four outputs will sink 600 mA in the on state. The outputs have a minimum breakdown voltage (load dump) of 60 V and a sustaining voltage of 40 V. The inputs are compatible with TTL and 5 V CMOS logic systems. Over-current protection for each channel has been designed into these devices and is activated at approximately 1 A. It protects each output from short circuits with supply voltages up to 25 V. When an output current trip point is reached, that output stage is driven linearly resulting in a reduced output current level. If an over-current or short circuit condition continues, the thermal limiting circuits will first sense the rise in junction temperature and then the rise in chip temperature, further decreasing the output current. Under worst-case conditions, the six devices in this family will tolerate short-circuits on all outputs, simultaneously. These devices can be used to drive various loads including incandescent lamps (without warming or limiting resistors) or inductive loads such as relays, solenoids, or dc stepping motors. The suffix ‘B’ devices are 16-pin power DIPs while the suffix ‘EB’ devices are 28-lead power PLCCs for surface-mount applications. Both packages are of batwing construction to provide for maximum package power dissipation.

FEATURES

I 600 mA Output Current per Channel I Independent Over-Current Protection for Each Driver I Thermal Protection for Device and Each Driver I Low Output-Saturation Voltage I Integral Output Flyback Diodes I TTL and 5 V CMOS Compatible Inputs I Pin-Compatible With UDN2543B/EB ABSOLUTE MAXIMUM RATINGS at TA = 25°C Over-Current Protected Output Voltage, Package Power Dissipation, Operating Temperature Range, T A Storage Temperature Range, *Outputs are peak current limited at approximately 1.0 A per driver. See Circuit Description and Applications for further information. Always order by complete part number: a prefix to indicate operating temperature range + the basic four-digit part number + a suffix to indicate package style, e.g., UDK2549EB . UDx2549B Data Sheet 29317.8 3 14 8 9 ENABLE GROUND GROUND OUT K GROUND GROUND OUT3 OUT4 K OUT1 V CC IN 1 Dwg. PP-017-1 IN4 IN3 IN 2 2549

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Worcester, Massachusetts 01615-0036 (508) 853-5000 FUNCTIONAL BLOCK DIAGRAM (1 of 4 Channels) UDx2549EB 50 75 100 125 150 ALLOWABLE PACKAGE POWER DISSIPATION IN WATTSTEMPERATURE IN °C R = 6°C/WθJT Dwg. GP-004-1A SUFFIX 'EB', R = 36°C/WθJA SUFFIX 'B', R = 43°C/WθJA VCC <<1 Ω OUT Dwg. FP-041 N IN N THERMAL LIMIT ENABLE K GROUND GROUND GROUND GROUND Dwg. PP-019-1 K NO CONNECTION ENABLESUPPLY NC NC CCV OUT1 OUT2OUT3 OUT 4 IN4 IN3 IN2 IN1 NO CONNECTION K Copyright © 1991, 1995, Allegro MicroSystems, Inc.

www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ. Max. Units Output Leakage Current I CEX VOUT = 60 V, VIN = 0.8 V, VEN = 2.0 V — <1.0 100 µA VOUT = 60 V, VIN = 2.0 V, VEN = 0.8 V — <1.0 100 µA Output Sustaining Voltage V OUT(SUS) IOUT = 100 mA, VIN = VEN = 0.8 V 40 —— V Output Saturation Voltage V OUT(SAT) IOUT = 100 mA —— 200 mV IOUT = 400 mA —— 400 mV IOUT = 600 mA —— 600 mV Over-Current Trip I TRIP — 1.0 — A Input Voltage Logic 1 V IN(1) or VEN(1) 2.0 —— V Logic 0 V IN(0) or VEN(0) —— 0.8 V Input Current Logic 1 V IN(1) or VEN(1) = 2.0 V —— 10 µA Logic 0 V IN(0) or VEN(0) = 0.8 V —— -10 µA Total Supply Current I CC IOUT = 600 mA, VIN* = VEN = 2.0 V —— 65 mA All Outputs OFF —— 15 mA Clamp Diode Forward Voltage V F IF = 1.0 A —— 1.7 V Clamp Diode Leakage Current I R VR = 60 V, D1 + D2 or D3 + D4 —— 50 µA Thermal Limit T J — 165 — °C Limits Typical Data is for design information only. Negative current is defined as coming out of (sourcing) the specified terminal. As used here, -100 is defined as greater than +10 (absolute magnitude convention) and the minimum is implicitly zero. * All inputs simultaneously, all other tests are performed with each input tested separately. ELECTRICAL CHARACTERISTICS at TA = +25°C (prefix ‘UDN’) or over operating temperature range (prefix ‘UDK’ or ‘UDQ’), VCC = 4.75 V to 5.25 V

Worcester, Massachusetts 01615-0036 (508) 853-5000 CIRCUIT DESCRIPTION AND APPLICATION INCANDESCENT LAMP DRIVER High incandescent lamp turn-ON/in-rush currents can contribute to poor lamp reliability and destroy semiconductor lamp drivers. Warming or current-limiting resistors protect both driver and lamp but use signifi- cant power either when the lamp is OFF or when the lamp is ON, respectively. Lamps with steady-state current ratings up to 600 mA can be driven by these devices without the need for warming (parallel) or current-limiting (series) resistors. When an incandescent lamp is initially turned ON, the cold filament is at minimum resistance and would normally allow a 10x to 12x in-rush current. With the these drivers, during turn-ON, the high in-rush current is sensed by the internal low-value sense resistor. Drive current to the output stage is then diverted by the shunting transistor, and the load current is momentarily limited to approximately 1.0 A. During this short transition period, the output current is reduced to a value dependent on supply voltage and filament resistance. During lamp warmup, the filament resistance increases to its maximum value, the output stage goes into saturation and applies maximum rated voltage to the lamp. INDUCTIVE LOAD DRIVER Bifilar (unipolar) stepper motors, relays, or solenoids can be driven directly. The internal flyback diodes prevent damage to the output transistors by suppressing the high-voltage spikes which occur when turning OFF an inductive load. For rapid current decay (fast turn-OFF speeds), the use of Zener diodes will raise the flyback voltage and improve performance. However, the peak voltage must not exceed the specified minimum sustaining voltage (V SUPPLY + VZ + VF ≤ VOUT(SUS)). FAULT CONDITIONS In the event of a shorted load, the load current will attempt to increase. As described above, the drive current to the affected output stage is reduced, causing the output stage to go linear, limiting the peak output current to approximately 1 A. As the power dissipation of that output stage increases, a thermal gradient sensing circuit will become operational, further decreasing the drive current to the affected output stage and reducing the output current to a value dependent on supply voltage and load resistance. Continuous or multiple overload conditions causing the chip tem- perature to reach approximately 165°C will result in an additional reduction in output current to maintain a safe level. If the fault condition is corrected, the output stage will return to its normal saturated condition. TYPICAL OUTPUT CHARACTERISTIC VOUT(SAT) Dwg. GP-013 OUTPUT VOLTAGE, V OUT OUTPUT CURRENT, I OUT T < 150°C T = 165°CJ J JUNCTION TEMP. LIMIT NOT TO SCALE TRIP I THERMAL GRADIENT SENSING TYPICAL OUTPUT BEHAVIOR NORMAL LAMP IN-RUSH CURRENT TIME THERMAL GRADIENT SENSING CURRENT LIMIT Dwg. WP-008 NOT TO SCALE ITRIP LAMP CURRENT

www.allegromicro.com UDN2549B and UDQ2549B Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) NOTES: 1. Exact body and lead configuration at vendor ’s option within limits shown. 2. Lead spacing tolerance is non-cumulative 3. Lead thickness is measured at seating plane or below. 4. Webbed lead frame. Leads 4, 5, 12, and 13 are internally one piece. 0.508 0.204 7.62 BSC Dwg. MA-001-17A mm 10.92 MAX 1 8 7.11 6.10 5.33 MAX 1.77 1.15 0.39 MIN 0.558 0.356 2.54 BSC 0.13 MIN 3.81 2.93 19.68 18.67 NOTE 4 0.020 0.008 0.300 BSC Dwg. MA-001-17A in 0.430 MAX 1 8 0.280 0.240 0.210 MAX 0.070 0.045 0.015 MIN 0.022 0.014 0.100 BSC 0.005 MIN 0.150 0.115 0.775 0.735 NOTE 4

Worcester, Massachusetts 01615-0036 (508) 853-5000 UDN2549EB and UDQ2549EB Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) NOTES: 1. Exact body and lead configuration at vendor ’s option within limits shown. 2. Lead spacing tolerance is non-cumulative 3. Webbed lead frame. Leads 5 through 11 and 19 through 25 are internally one piece. 18 12 0.020 MIN 0.050 BSC 128 INDEX AREA Dwg. MA-005-28A in 0.026 0.032 0.013 0.021 19 11 0.165 0.180 0.495 0.485 0.456 0.450 0.495 0.485 0.456 0.450 0.219 0.191 0.219 0.191 0.51 MIN 4.57 4.20 1.27 BSC 12.57 12.32 11.582 11.430 128 INDEX AREA Dwg. MA-005-28A mm 0.812 0.661 0.331 0.533 12.57 12.32 18 12 11.58 11.43 5.56 4.85 5.56 4.85

www.allegromicro.com The products described here are manufactured under one or more Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsi- bility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.

Worcester, Massachusetts 01615-0036 (508) 853-5000 POWER SINK DRIVERS IN ORDER OF 1) OUTPUT CURRENT, 2) OUTPUT VOLTAGE, 3) NUMBER OF DRIVERS Output Ratings * Features Serial Latched Diode Internal mA V # Input Drivers Clamp Outputs Protection Part Number † 75 17 8 X X – constant current – 6275 17 16 X X – constant current – 6276 100 20 8 – – – saturated – 2595 30 32X X – – – 5833 40 32X X – saturated – 5832 50 8 addressable decoder/driver DMOS – 6B259 50 8 – X – DMOS – 6B273 50 8 X X – DMOS – 6B595 250 50 8 addressable decoder/driver DMOS – 6259 50 8 – X – DMOS – 6273 50 8 X X – DMOS – 6595 135 7 – – X – – 7003 300 45 1 – Hall sensor/driver X – X 5140 50 7 – – X – – 2003 50 8 – – X – – 2803 50 8 – – X saturated – 2596 60 4 – – X saturated X 2557 95 7 – – X – – 2023 95 8 – – X – – 2823 350 50 4 – X X – – 5800 50 7 – – X – – 2004 50 8 – – X – – 2804 50 8 – X X – – 5801 50 8 X X – – – 5821 50 8 X X X – – 5841 50 8 addressable decoder/driver DMOS – 6A259 50 8 X X – DMOS – 6A595 80 8 X X – – – 5822 80 8 X X X – – 5842 95 7 – – X – – 2024 95 8 – – X – – 2824 450 30 28 dual 4- to 14-line decoder/driver – – 6817 600 60 4 – – – saturated X 2547 60 4 – – X saturated X 2549 700 60 4 – – X saturated X 2543 and 2559 750 50 8 – – X saturated – 2597 900 14 2– Hall sensor/driver X saturated X 362 5 26 2 – Hall sensor/driver X saturated X 3626 1000 46 4 stepper motor controller/driver MOS – 7024 and 7029 1200 46 4 microstepping controller/driver MOS – 7042 1250 50 4 stepper motor translator/driver – X 5804 50 4 – – X – – 2064 and 2068 1500 80 4 – – X – – 2065 and 2069 1800 50 4 – – X – – 2544 50 4 – – X – – 2540 3000 46 4 stepper motor controller/driver MOS – 7026 46 4 microstepping controller/driver MOS – 7044 4000 50 4 – – X – – 2878 80 4 – – X – – 2879 * Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. † Complete part number includes additional characters to indicate operating temperature range and package style.