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Part: A2549
Category:
Description: Protected Quad Power Driver
Company: Allegro Micro Systems, Inc.
Datasheet: Download A2549 datasheet File size : 192 kB
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Datasheet text preview:
2549
UDx2549B (DIP)
OUT4 K OUT3 GROUND GROUND OUT2 K OUT1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 IN 4 IN3 ENABLE GROUND GROUND V CC IN 2 IN 1
PROTECTED QUAD POWER DRIVER
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.
Data Sheet 29317.8
Dwg. PP-017-1
ABSOLUTE MAXIMUM RATINGS at TA = 25°C
Output Voltage, VOUT . . . . . . . . . . . . . 60 V Over-Current Protected Output Voltage, VOUT . . . . . . . . . . . . . . . . . . . . . . . 25 V Output Current, IOUT . . . . . . . . . . . . . 1.0 A* Supply Voltage, VCC . . . . . . . . . . . . . . 7.0 V Input Voltage, VIN or VEN . . . . . . . . . . 7.0 V Package Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . See Graph Operating Temperature Range, TA Prefix `UDK' . . . . . . . -40°C to +125°C Prefix `UDN' . . . . . . . . -20°C to +85°C Prefix `UDQ' . . . . . . . . -40°C to +85°C Storage Temperature Range, TS . . . . . . . . . . . . . . . -55°C to +150°C
*Outputs are peak current limited at approximately 1.0 A per driver. See Circuit Description and Applications for further information.
FEATURES
s s s s s s s 600 mA Output Current per Channel Independent Over-Current Protection for Each Driver Thermal Protection for Device and Each Driver Low Output-Saturation Voltage Integral Output Flyback Diodes TTL and 5 V CMOS Compatible Inputs Pin-Compatible With UDN2543B/EB
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 .
2549 PROTECTED QUAD POWER DRIVER
FUNCTIONAL BLOCK DIAGRAM
(1 of 4 Channels)
V CC
K
ENABLE IN N THERMAL LIMIT
OUTN
<<1
Dwg. FP-041
UDx2549EB (PLCC)
NO CONNECTION
10
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
ENABLE
OUT2
OUT1
IN 1
K
IN 2
28
27
26
4
2
3
1
8
R JT = 6°C/W
NC GROUND 5 6 7 8 9 10 GROUND 11 NC VCC 25 24 23 22 21 20 19 GROUND GROUND
6
4
SUFFIX 'EB', R
JA
= 36°C/W
2
SUFFIX 'B', R JA = 43°C/W
15
12
13
14
16
NO CONNECTION
OUT 4
OUT 3
IN 4
IN 3
K
17
SUPPLY
18
0 25 50 75 100 TEMPERATURE IN °C 125 150
Dwg. PP-019-1
Dwg. GP-004-1A
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1991, 1995, Allegro MicroSystems, Inc.
2549 PROTECTED QUAD POWER DRIVER
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
Limits Characteristic Output Leakage Current Symbol I CEX Test Conditions VOUT = 60 V, VIN = 0.8 V, VEN = 2.0 V VOUT = 60 V, VIN = 2.0 V, VEN = 0.8 V Output Sustaining Voltage Output Saturation Voltage V OUT(SUS) V OUT(SAT) IOUT = 100 mA, VIN = VEN = 0.8 V IOUT = 100 mA IOUT = 400 mA IOUT = 600 mA Over-Current Trip Input Voltage IT R I P Logic 1 Logic 0 Input Current Logic 1 Logic 0 Total Supply Current I CC VIN(1) or VEN(1) VIN(0) or VEN(0) VIN(1) or VEN(1) = 2.0 V VIN(0) or VEN(0) = 0.8 V IOUT = 600 mA, VIN* = VEN = 2.0 V All Outputs OFF Clamp Diode Forward Voltage Clamp Diode Leakage Current Thermal Limit VF IR TJ IF = 1.0 A VR = 60 V, D1 + D2 or D3 + D4 Min. -- -- 40 -- -- -- -- 2.0 -- -- -- -- -- -- -- -- Typ. <1.0 <1.0 -- -- -- -- 1.0 -- -- -- -- -- -- -- -- 165 Max. 100 100 -- 200 400 600 -- -- 0.8 10 -10 65 15 1.7 50 -- Units µA µA V mV mV mV A V V µA µA mA mA V µA °C
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.
www.allegromicro.com
2549 PROTECTED QUAD POWER DRIVER
TYPICAL OUTPUT CHARACTERISTIC 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 significant 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 (VSUPPLY + 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 temperature to reach approximately 165°C will result in an additional reduction in output current to maintain a safe level.
TIME
TJ < 150°C
NOT TO SCALE
OUTPUT VOLTAGE, V OUT
T
J
= 165°C
JUNCTION TEMP. LIMIT
THERMAL GRADIENT SENSING V OUT(SAT)
I TRIP
OUTPUT CURRENT, I
OUT
Dwg. GP-013
TYPICAL OUTPUT BEHAVIOR
NORMAL LAMP IN-RUSH CURRENT
NOT TO SCALE
LAMP CURRENT
THERMAL GRADIENT SENSING CURRENT LIMIT ITRIP
0
Dwg. WP-008
If the fault condition is corrected, the output stage will return to its normal saturated condition.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
2549 PROTECTED QUAD POWER DRIVER
UDN2549B and UDQ2549B
Dimensions in Inches (controlling dimensions)
16
NOTE 4
9
0.020 0.008
0.430 0.280 0.240
MAX
0.300
BSC
1 0.070 0.045
0.100 0.775 0.735
BSC
8 0.005
MIN
0.210
MAX
0.015
MIN
0.150 0.115 0.022 0.014
Dwg. MA-001-17A in
Dimensions in Millimeters (for reference only)
0.508 0.204
16
NOTE 4
9
10.92 7.11 6.10
MAX
7.62
BSC
1 1.77 1.15
2.54 19.68 18.67
BSC
8 0.13
MIN
5.33
MAX
0.39
MIN
3.81 2.93 0.558 0.356
Dwg. MA-001-17A mm
NOTES: 1. 2. 3. 4.
Exact body and lead configuration at vendor's option within limits shown. Lead spacing tolerance is non-cumulative Lead thickness is measured at seating plane or below. Webbed lead frame. Leads 4, 5, 12, and 13 are internally one piece.
www.allegromicro.com
Others parts begin by a2
A2-1 A2-2 A2-3 A2-4
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