IC DARLINGTON SWITCH QUAD SOIC20

L6221AD

Manufacturer Part NumberL6221AD
DescriptionIC DARLINGTON SWITCH QUAD SOIC20
ManufacturerSTMicroelectronics
TypeDarlington Array
L6221AD datasheet
 


Specifications of L6221AD

Voltage - Supply4.5 V ~ 5.5 VMounting TypeSurface Mount
Package / Case20-SOIC (7.5mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
Number Of Drivers/receivers-Protocol-
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Application information
6
Application information
When inductive loads are driven by the L6221, a Zener diode in series with the integral free-
wheeling diodes increases the voltage across which energy stored in the load is discharged
and therefore speeds the current decay (
For reliability it is suggested that the Zener is chosen so that
There are two reasons for this:
The Zener voltage changes in temperature and current.
The instantaneous power must be limited to avoid the reverse second breakdown.
Figure 19. Free-wheeling diode connection when driving inductive loads
Care must be taken to ensure that the collectors are placed close together to avoid different
current partitioning at turn-off.
It is suggested to put in parallel channel 1 and 4 and channel 2 and 3 as shown in
for the similar electrical characteristics of the logic section (turn-on and turn-off delay time)
and the power stages (collector saturation voltage, free-wheeling diode forward voltage).
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Figure 19
).
V p
+
V z 35 V
Figure 20