Datasheet

TMC236/A/B DATA SHEET (V2.10 / 2016-Jun-06) 23
Copyright © 2004, TRINAMIC Motion Control GmbH & Co KG
Thermal Protection (1)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
T
JOT
Thermal shutdown
145
155
165
°C
T
JOTHYS
T
JOT
hysteresis
15
°C
T
JWT
Prewarning temperature
135
145
155
°C
T
JWTHYS
T
JWT
hysteresis
15
°C
(1) All temperatures are for A-type/B-type. The non-A/B-types have 5°C lower values in all fields.
Thermal Characteristics
Symbol
Parameter
Conditions
Typ
Unit
R
THA12
Thermal resistance bridge transistor junction to
ambient, one bridge chopping, fixed polarity
soldered to 2 layer
PCB
88
°K/W
R
THA22
Thermal resistance bridge transistor junction to
ambient, two bridges chopping, fixed polarity
soldered to 2 layer
PCB
68
°K/W
R
THA14
Thermal resistance bridge transistor junction to
ambient, one bridge chopping, fixed polarity
soldered to 4 layer
PCB (pessimistic)
84
°K/W
R
THA24
Thermal resistance bridge transistor junction to
ambient, two bridges chopping, fixed polarity
soldered to 4 layer
PCB (pessimistic)
51
°K/W
Typical Power Dissipation at high load / high temperature
Coil: L
W
= 10mH, R
W
= 5.0
Chopping with: t
DUTY
= 33% ON, only slow decay
Current
both brid-
ges on
Current
one bridge
on
Ambient
temperature
T
A
Motor supply
voltage
V
M
Slope
t
SLP
Chopper
frequency
f
CHOP
Typ total power
dissipation
P
D
560 mA
-
105 °C
16 V
400 ns
25 KHz
490 mW
-
800 mA
105 °C
16 V
400 ns
25 KHz
450 mW
560 mA
125 °C
14 V
60ns
20 KHz
350 mW
800 mA
125 °C
14 V
60ns
20 KHz
340 mW
1000 mA
-
70 °C
28 V
60ns
25 KHz
1000 mW
-
1500 mA
70 °C
28 V
60ns
25 KHz
1100 mW