L6221AD013TR STMicroelectronics, L6221AD013TR Datasheet - Page 14

• Manufacturer Part Number: L6221AD013TR
• Description: IC SWITCH DARL MONO QUAD 20SOIC
• Manufacturer: STMicroelectronics
• Type: Darlington Arrayr

Specifications of L6221AD013TR

• Voltage - Supply: 4.5 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -
• Protocol: -
• Other names: 497-4004-2

Application information
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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:
●
●
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).
The Zener voltage changes in temperature and current.
The instantaneous power must be limited to avoid the reverse second breakdown.
V p
Figure 19
+
V z 35 V
).
Figure 20