TLE5012 Datasheet, PDF (18/57 Pages) Infineon Technologies AG – GMR-Based Angular Sensor for Rotor Position Sensing

TLE5012
Specification
Table 3 Operating Range (cont’d)
Parameter
Symbol
Values
Unit Note / Test Condition
Min. Typ. Max.
Magnetic Induction
B_XY
30 -
50
mT in X/Y direction³⁾
Angle Range
Ang
0
-
360
°
1) Directly blocked with 100nF ceramic capacitor
2) Max. current to GND over Open Drain Output
3) Values refer to an homogenous magnetic field (B_XY) without vertical magnetic induction (B_Z = 0mT).
Note: The thermal resistances listed in Table 20 “Package Parameters” on Page 55 must be used to calculate
the corresponding ambient temperature.
Calculation of the Junction Temperature
The total power dissipation PTOT of the chip increases its temperature above the ambient temperature.
The power multiplied by the total thermal resistance RthJA (Junction to Ambient) leads to the final junction
temperature. RthJA is the sum of the addition of the values of the two components Junction to Case and Case to
Ambient.
R_thJA = R_thJC + R_thCA
(1)
T_J = T_A + ∆T
∆T = R_thJA × P_TOT = R_thJA × (V_DD × I _DD + V_OUT × I_OUT ) (I_DD, I_OUT > 0, if direction is into IC)
Example (assuming no load on V_out):
V_DD = 5V
(2)
I _DD = 12mA
∆T
=
150_{WK}


×
5[V
]×
0.012[A] +
0[VA]
=
9K
For moulded sensors, the calculation with RthJC is more adequate.
Target Data Sheet
18
V 0.46, 2009-09