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L6228Q Fiches technique(PDF) 22 Page - STMicroelectronics

No de pièce L6228Q
Description  DMOS driver for bipolar stepper motor
PDF  32 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6228Q Fiches technique(HTML) 22 Page - STMicroelectronics

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Circuit description
L6228Q
22/32
Doc ID 14321 Rev 4
Figure 23.
tDISABLE versus CEN and REN (VDD = 5 V)
Figure 24.
tDELAY versus CEN (VDD = 5 V)
4.10
Thermal protection
In addition to the overcurrent protection, the L6228Q integrates a thermal protection for
preventing the device destruction in case of junction over temperature. It works sensing the
die temperature by means of a sensible element integrated in the die. The device switch-off
when the junction temperature reaches 165 °C (typ. value) with 15 °C hysteresis
(typ. value).
1
1 0
100
1
10
100
1 .10
3
C EN [n F ]
R EN = 2 2 0 k Ω
R EN = 1 0 0 k Ω
R EN = 4 7 k Ω
R EN = 3 3 k Ω
R EN = 1 0 k Ω
1
1 0
100
1
10
100
1 .10
3
C EN [n F ]
R EN = 2 2 0 k Ω
R EN = 1 0 0 k Ω
R EN = 4 7 k Ω
R EN = 3 3 k Ω
R EN = 1 0 k Ω
110
100
0.1
1
10
Cen [nF]



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