Document
Features and Benefits
▪ TTL, DTL, PMOS, or CMOS compatible inputs ▪ 500 mA output source current capability ▪ Transient-protected outputs ▪ Output breakdown voltage to 50 V ▪ DIP or SOIC packaging
Package: 20-pin SOICW (suffix LW)
Not to scale
(drop-in replacement for discontinued 18-pin SOIC variants)
A2982
8-Channel Source Driver
Description
Recommended for high-side switching applications that benefit from separate logic and load grounds, these devices encompass load supply voltages to 50 V and output currents to -500 mA. These 8-channel source drivers are useful for interfacing between low-level logic and high-current loads. Typical loads include relays, solenoids, lamps, stepper and/or servo motors, print hammers, and LEDs.
All devices may be used with 5Vlogic systems —TTL, Schottky TTL, DTL, and 5 V CMOS. The device packages offered are electrically interchangeable, and will withstand a maximum output off voltage of 50 V, and operate to a minimum of 5 V.All devices in this series integrate input current limiting resistors and output transient suppression diodes, and are activated by an active high input.
The package is a 20-pin wide-body SOIC with improved thermal characteristics compared to the 18-pin SOIC version it replaces (100% pin-compatible electrically).
The package is lead (Pb) free, with 100% matte-tin leadframe plating.
Simplified Block Diagram
29310U
(NC pins, 10 and 11, not present on discontinued 18-pin LW package)
A2982
8-Channel Source Driver
Selection Guide Part Number
A2982SLWTR-T
Package 20-pin SOICW
Packing 1000 per reel
Ambient Temperature TA (°C)
–20 to 85
Absolute Maximum Ratings
Characteristic Output Voltage Range Input Voltage Output Current Package Power Dissipation Operating Ambient Temperature Maximum Junction Temperature Storage Temperature
Symbol
VCE VIN IOUT PD TA TJ(max) Tstg
See graph Range S
Notes
Rating 5 to 50
20 –500
– –20 to 85
150 –55 to 150
Units V V mA – ºC ºC ºC
AL LOWAB L E PAC K AGE POWE R DIS S IPATION (W)
2.5
2.0 20-LE AD S OIC , R JA = 90 C /W
1.5
1.0
0.5
0 25 50 75 100 125 150 AMB IE NT TE MP E R ATUR E C
Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A2982
8-Channel Source Driver
One of Eight Drivers
Typical electrosensitive printer application
IN1 1 IN2 2 IN3 3
IN4 4 IN5 5 IN6 6 IN7 7 IN8 8 VS 9 NC 10
RL
20
RL
19
RL
18
RL
17
RL
16
RL
15
RL
14
RL
13
12
11 NC
Pins 10 and 11 can float; other pins match discontinued 18-pin SOIC: 1 to 9 same, pins 12 to 20 match pins 10 to 18
Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A2982
8-Channel Source Driver
ELECTRICAL CHARACTERISTICS1,2 at TA = +25°C (unless otherwise specified).
Characteristic Output Leakage Current3 Output Sustaining Voltage
Collector-Emitter Saturation Voltage
Input Current
Output Source Current (Outputs Open)
Symbol ICEX
VCE(SUS)
VCE(SAT)
IIN(ON)
Test Conditions
VIN = 0.4 V, VS = 50 V IOUT = -45 mA VIN = 2.4 V, IOUT = -100 mA VIN = 2.4 V, IOUT = -225 mA VIN = 2.4 V, IOUT = -350 mA VIN = 2.4 V VIN = 12 V
lOUT VIN = 2.4 V, VCE = 2.0 V
Test Fig. 1 — 2 2 2 3 3
2
Min. — 35 — — — — —
-350
Typ. — — 1.6 1.7 1.8 140 1.25
—
Supply Current Leakage Current
IS VIN = 2.4 V*, VS = 50 V
4 ——
Clamp Diode Current
Clamp Diode Forward Voltage Turn-On Delay Turn-Off Delay4
IR VR = 50 V, VIN = 0.4 V*
5 ——
VF IF = 350 mA
6 — 1.5
tON 0.5 EIN to 0.5 EOUT, RL = 100Ω, VS = 35 V
— — 0.3
tOFF 0.5 EIN to 0.5 EOUT, RL = 100Ω, VS = 35 V, See Note
—
—
2.0
Max. 20 — 1.8 1.9 2.0 200 1.93
—
10
50
2.0
2.0 10
Units μA V V V V μA mA
mA
mA
μA
V
μs μs
1Negative current is defined as coming out of (sourcing) the specified device terminal.
2All unused inputs must be connected to ground. Pull-down resistors (approximately 10 kΩ) are recommended for inputs that are allowed to float while power is being applied to VS.
3All inputs simultaneously.
4Turn-off delay is influenced by load conditions. Systems applications well below the specified output loading may require timing considerations for some designs, i.e., multiplexed displays or when used in combination with sink drivers in a totem pole configuration.
Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A2982
8-Channel Source Driver
Figure 1
VS
VIN
μA I CEX
Dwg. No. A-11,083
TEST FIGURES
Figure 2 VS
V VCE
mA
IOUT VIN
Dwg. No. A-11,084
Figure 3
VS
I IN
mA
VIN
OPEN
Dwg. No. A-11,085
Figure 4 VS
I S mA
VIN
OPEN
Dwg. No. A-11,086
Figure 5
VS
IR μA
VIN
Dwg. No. A-11,087
Figure 6
OPEN
OPEN
VF V
IF
Dwg. No. A-11,088
Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com
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A2982
8-Channel Source Driver
ALLOWABLE PEAK COLLECTOR CURRENT IN mA AT 50°C ALLOWABLE PEAK COLLECTOR CURRENT IN mA AT 70°C
Allowable pea.