ALLEGRO UDN2987LW-6-T

UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Package A, 20-pin DIP
Approximate Scale 1:1
Package LW, 20-pin SOIC-W
Features
4.75 to 35 V driver supply voltage
Output enable-disable (OE/R)
350 mA output source current
Overcurrent protected
Internal ground clamp diodes
Output Breakdown Voltage 35 V minimum
TTL, DTL, PMOS, or CMOS compatible inputs
Internal Thermal Shut Down (TSD)
Applications
Relays
Motors
Solenoids
LEDs
Incandescent lamps
CPU
OUT1
IN2
OUT2
IN3
OUT3
IN4
OUT4
IN5
2987
OUT5
IN6
OUT6
IN7
OUT7
IN8
OUT8
FAULT
OE/R¯
1 to 8 Load
Components
GND
VS
4.75 to 35 V
29876DS
In these drivers, each channel includes a latch to turn off
that channel if the maximum channel current is exceeded. All
channels are disabled if the thermal shutdown is activated. A
common FAULT output is used to indicate either chip thermal
shutdown or any overcurrent condition. All outputs are enabled
¯ is low,
by pulling the common OE/R input high. When OE/R
all outputs are inhibited and the eight latches are reset. The
¯ function can be especially important during power-up, in
OE/R
preventing floating inputs from turning on the outputs.
Under normal operating conditions, each of eight outputs
will source in excess of 100 mA continuously at an ambient
temperature of 25°C and a supply of 35 V. The over-current
fault circuit will protect the device from short-circuits to ground
with supply voltages of up to 30 V.
The inputs are compatible with 5 and 12 V logic systems:
TTL, Schottky TTL, DTL, PMOS, and CMOS. In all cases, the
output is switched ON by an active high input level. Compared
to their predecessor devices, the UDN2987A and UDN2987LW,
the UDN2987A-6 and UDN2987LW-6 have a significantly
faster TPHL (200 ns typical) and a lower driver supply voltage
rating (4.75 V), which allows the use of 5 V logic.
Typical Application
IN1
Providing overcurrent protection for each of its eight
sourcing outputs, the UDN2987A-6 and UDN2987LW-6
drivers are used as an interface between standard low-level logic
and relays, motors, solenoids, LEDs, and incandescent lamps.
These devices include thermal shut down and output transient
protection/clamp diodes for use with sustaining
voltages to 35 V.
The UDN2987A-6 is supplied in a 20-pin dual in-line plastic
(DIP) package; the UDN2987LW-6 is supplied in a 20-lead
small-outline (SOIC-W) plastic package. The Pb (lead) free
versions have 100% matte-tin leadframe plating.
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Selection Guide
Part Number
Pb-free*
Packing
Package
UDN2987A-6-T
Yes
18 pieces/tube
UDN2987LW-6-T
Yes
37 pieces/tube
20-pin DIP
UDN2987LWTR-6-T
Yes
1000 pieces/13-in. reel
20-pin SOIC, wide body
*Pb-based variants are being phased out of the product line. The variants cited in this footnote are in production
but have been determined to be LAST TIME BUY. This classification indicates that sale of this device is currently restricted to existing customer applications. The variants should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change:
October 31, 2006. Deadline for receipt fo LAST TIME BUY orders: April 27, 2007. These variants include:
UDN2987A-6, UDN2987LW-6, and UDN2987LWTR-6.
Absolute Maximum Ratings
Parameter
Supply Voltage
Symbol
Conditions
Min.
VS
Continuous Output Current*
IOUT
FAULT Output Voltage
VCE
Outputs are disabled at approximately –500 mA
Max. Units
–
35
V
–500
–
mA
–
35
V
FAULT Output Current
IC
–
30
mA
Input Voltage
VIN
–0.3
14
V
Junction Temperature
TJ
–
150
°C
Storage Temperature Range
TS
–55
150
°C
Operating Temperature Range
TA
–20
85
°C
*For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
2
29876DS, Rev. 1pb
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Functional Block Diagram
VS
Thermal
Shut Down
OE/R¯
FAULT
Ÿ
+
–
R
S
Q
IN1
OUT1
Driver 1 of 8 drivers
IN8
OUT8
GND
Pin-Out Diagram
IN1
1
20
OUT1
IN2
2
19
OUT2
IN3
3
18
OUT3
IN4
4
17
OUT4
IN5
5
16
OUT5
IN6
6
15
OUT6
IN7
7
14
OUT7
IN8
8
13
OUT8
12
GND
11
VS
FAULT
9
OE/R
10
x8
OE
OEN
FF
SENSE N
Dwg. PP-067
Package A (DIP) shown. Package LW
(SOIC-W) is electrically identical and has
the same terminal number assignment.
Terminal List Table
Number
Name
1
IN1
2
IN2
3
IN3
4
IN4
5
IN5
6
IN6
7
IN7
8
IN8
9
FAULT
10
OE/ ¯R¯
11
VS
12
GND
13
OUT8
14
OUT7
15
OUT6
16
OUT5
17
OUT4
18
OUT3
19
OUT2
20
OUT1
Description
Logic input 1
Logic input 2
Logic input 3
Logic input 4
Logic input 5
Logic input 6
Logic input 7
Logic input 8
Fault output
Logic input for Output Enable and Reset
Supply voltage
Supply ground
Output 8 to load
Output 7 to load
Output 6 to load
Output 5 to load
Output 4 to load
Output 3 to load
Output 2 to load
Output 1 to load
3
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
ELECTRICAL CHARACTERISTICS, valid at TA = 25°C, VOER = 2.4 V, VS = 35 V, unless otherwise noted
Characteristic
Supply Voltage Functional Range
Symbol
Test Conditions
VS
Typ.1
Max.
4.75
—
35
V
–200
<–5.0
–
μA
Min.
Units
Output Leakage Current2
IOUTCEX
VIN = 0.4 V, all inputs simultaneously
Output Sustaining Voltage
VOUT(sus)
IOUT = –350 mA, L = 2.0 mH
35
—
—
V
VIN = 2.4 V, IOUT = –100 mA
—
1.6
1.8
V
VIN = 2.4 V, IOUT = –225 mA
—
1.7
1.9
V
VIN = 2.4 V, IOUT = –350 mA
—
1.8
2.0
V
Output Saturation Voltage
Channel Shut Down
Threshold2
FAULT Leakage Current
FAULT Saturation Voltage
Input Voltage
¯ pins
Input Current: INx, OE/R
VOUT(SAT)
VIN = 2.4 V, Vs = 30 V
–
–500
–370
mA
ICEX
IM
VCC = 35 V
—
<1.0
100
μA
VCE(SAT)
IC = 30 mA
—
0.3
0.8
V
VIN(ON)
2.4
—
—
V
VIN(OFF)
—
—
0.4
V
VIN = 2.4 V
—
—
100
μA
IIN(ON)
VIN = 5.0 V
—
—
600
μA
VIN = 12 V
—
—
1000
μA
IIN(OFF)
VIN = 0.4 V
—
—
15
μA
Clamp Diode Leakage Current
IR
VR = 35 V, TA = 70°C
—
—
50
μA
Clamp Diode Forward Voltage
VF
IF = 350 mA
—
1.5
1.8
V
IS(ON)
VIN = 2.4 V, all inputs simultaneously; outputs open
—
7.0
18
mA
IS(OFF)
VIN = 0.4 V, all inputs simultaneously
—
6.0
12
mA
—
165
—
°C
Supply Current
Thermal Shut Down
TJTSD
Thermal Hysteresis
TJTSDhys
—
15
—
°C
tRPD
1.0
—
—
μs
Reset Pulse Duration
Propagation Delay Time
Blank Time
tPLH
VS = 35 V, RL = 100 Ω, CLOAD = 30 pF
—
100
600
ns
tPHL
VS = 35 V, RL = 100 Ω, CLOAD = 30 pF
—
200
1000
ns
—
1.0
—
μs
tBLANK
1Typical
data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits.
2For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin.
4
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
THERMAL CHARACTERISTICS
Characteristics
Package Thermal Resistance*
*Additional
Rating
Unit
Package A, on 4-layer board based on JEDEC standard
32
°C/W
Package LW, on 4-layer board based on JEDEC standard
48
°C/W
Symbol
RθJA
Test Conditions
thermal information is available on the Allegro Web site.
Power Dissipation versus Ambient Temperature
4.0
3.5
3.0
PD (W)
A
g
= e LW
48
ºC
/W
)
QJ
2.0
W
Pa
(R cka
/
A
e ºC
ag 32
ck =
P a QJA
(R
2.5
)
1.5
1.0
0.5
0
25
50
75
100
125
150
TA (°C)
5
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
UDN2987x-6
Characteristic Performance
Output Current Waveshapes
VIN(A) = VIN(B)
tPLH
—
OE/R
tPHL
tRTB
Output (A) shorted
ISH
IOUT(A)
tBLANK
IM
IOUT(B)
Momentary fault or capacitive charging (<1μs)
Allowable Output Current as a Function of Duty Cycle
(UDN2987A-6 shown, multiply by 78% for UDN2987LW-6)
TA= 25°C, VS = 35 V
400
250
200
150
100
50
Quantity of outputs conducting simultaneously
8 7 6 5
4
3
2
350
Collector Current (mA)
300
0
400
Quantity of outputs conducting simultaneously
8 7 6
5
4
3
350
Collector Current (mA)
TA= 50°C, VS = 35 V
300
250
200
150
100
50
0
10
20
30
40
50
60
Duty Cycle (%)
70
80
90
100
0
0
10
20
30
40
50
60
70
80
90
100
Duty Cycle (%)
6
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
Applications Information and Circuit Description
As with all power integrated circuits, the UDN2987A-6 and
UDN2987LW-6 have a maximum allowable output current
rating. The 500 mA rating does not imply that operation at
that value is permitted or even obtainable. The channel output current trip point is specified as –370 mA, minimum;
therefore, attempted operation at current levels greater
than –370 mA may cause a fault indication and channel
shut down. The device is tested at a maximum of –350 mA
and that is the recommended maximum output current
per driver. It provides protection for current overloads or
shorted loads up to 30 V.
¯ input high.
All outputs are enabled by pulling the OE/R
¯ is low or allowed to float (internal pull-down),
When OE/R
all outputs are inhibited and the latches are reset. Note that
¯ low) should be at least 1 μs.
the reset pulse duration (OE/R
This will ensure safe operation under attempted reset conditions with a shorted load. The latches are also reset during
¯ input.
power-up, regardless of the state of the OE/R
The load current causes a small voltage drop across the
internal low-value sense resistor. This voltage is com-
pared to the voltage drop across a reference resistor with
a constant current. The two resistors are matched to eliminate errors due to manufacturing tolerances or temperature effects. Each channel includes a comparator and its
own latch. An overcurrent fault (VSENSE > VREF) will set
the affected latch and shut down only that channel. All
other channels will continue to operate normally. The
latch includes a 1 μs blanking delay, t BLANK, to prevent
unwanted triggering due to crossover currents generated
when switching inductive loads. For an abrupt short circuit,
the blanking and output switching times will allow a brief,
permissable current in excess of the trip current before the
output driver is turned off.
A common thermal shut down disables all outputs if the
chip temperature exceeds 165°C. At thermal shut down,
all latches are reset. The outputs are disabled until the chip
cools down to approximately 150°C (thermal hysteresis).
In the event of an overcurrent condition on any channel, or
chip thermal shut down, the FAULT open-collector output
is pulled low (turned on).
Overcurrent Fault Sense Circuit
VS
+
VREF
To Fault Latch
–
+
+
Matched
–
VSENSE
–
SENSE
REF
ILOAD
IREF
7
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
UDN2987x-6
Package A, 20-Pin DIP
1.060 26.92
0.980 24.89
A
.014 0.36
.008 0.20
B
20
Preliminary dimensions, for reference only
Dimensions in inches
Metric dimensions (mm) in brackets, for reference only
(reference JEDEC MS-001 AD)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Terminal #1 mark area
.280 7.11
.240 6.10
.300 .7.62
.430 10.92
MAX
A
1
2
.195 4.95
.115 2.92
SEATING
PLANE
C
.015 2.92
MIN
.005 0.13
MIN
.100 .2.54
.150 3.81
.115 2.92
.070 1.78
.045 1.14
24X
.022 .056
.014 .036
.010 [0.25] M C
Package LW, 20-pin SOIC-W
10.63 .419
9.97 .393
0.25 [.010] M B M
13.00 .512
12.60 .496
20
8º
0º
A
B
0.33 .013
0.20 .008
Preliminary dimensions, for reference only
Dimensions in millimeters
U.S. Customary dimensions (in.) in brackets, for reference only
(reference JEDEC MS-013 AC)
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A Terminal #1 mark area
7.60 .299
7.40 .291
A
1
1.27 .050
0.40 .016
2
0.25 .010
20X
SEATING
PLANE
0.10 [.004] C
20X
0.51 .020
0.31 .012
0.25 [.010] M C A B
C
SEATING PLANE
GAUGE PLANE
2.65 .104
2.35 .093
1.27 .050
0.30 .012
0.10 .004
8
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
UDN2987x-6
DABIC-5 8-Channel Source Driver
with Overcurrent Protection
The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889;
5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending.
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 responsibility for its
use; nor for any infringement of patents or other rights of third parties which may result from its use.
Copyright©2006, Allegro MicroSystems, Inc.
9
29876DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com