L6220N STMicroelectronics, L6220N Datasheet - Page 8

• Manufacturer Part Number: L6220N
• Description: QUAD DARLINGTON SWITCHES
• Manufacturer: STMicroelectronics

L6220 - L6220N
APPLICATION INFORMATION
When inductive loads are driven by L6220/N, 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 (Fig. 16). For reliability it
is suggested that the zener is chosen so that V
V
The reasons for this are two fold :
1) The zener voltage changes in temperature and
Figure 18 : Allowed Peak Collector-current versus
MOUNTING INSTRUCTION
The R
ing the GND pins to a suitable copper area of the
printed circuit board (Fig. 20) or to an external
heatsink (Fig. 21).
The diagram of figure 22 shows the maximum dis-
sipable power P
the side ” ” of two equal square copper areas hav-
8/12
z
< 35 V.
current.
th j-amb
of the L6220 can be reduced by solder-
Duty Cycle for 1, 2, 3 or 4 Contempo-
rary Working Outputs (L6220).
tot
and the R
th j-amb
as a function of
p
+
2) The instantaneouspower must be limited to
The particular internal logic allows an easier full step
driving using only two input signals.
Figure 19 : Allowed Peak Collector Cur-rent ver-
ing a thickness of 35
the pins temperature must not exceed 260 C and
the soldering time must not be longer than 12 sec-
onds.
The external heatsink or printed circuit copper area
must be connected to electrical ground.
avoid the reverse second breakdown.
sus Duty Cycle for 1, 2, 3 or 4 Con-
temporary Working Outputs
(L6220N).
(1.4 mils). During soldering