MC33389CDH Freescale Semiconductor, MC33389CDH Datasheet - Page 21

• Manufacturer Part Number: MC33389CDH
• Description: IC SYSTEM BASIS W/CAN 20-HSOP
• Manufacturer: Freescale Semiconductor

Specifications of MC33389CDH

• Controller Type: Systems Basis Chip (SBC), CAN
• Interface: SPI Serial
• Voltage - Supply: 5V
• Current - Supply: 3.5mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-HSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Example
consumption).
dissipation with a HSOP20.
SO28WB Package
one thermal resistance for the total power because the three
power sources strongly interact on the silicon for such a
package.
Analog Integrated Circuit Device Data
Freescale Semiconductor
The case (pin) to junction R
Assuming I
I
I
P
System assumptions:
If T
T
and T
This example represents the limit for the maximum power
V2
CAN
V1
CASE
V1 Power
Figure 6. HSOP-20 Simplified Thermal Model
AMB
= 1. 1 W, P
=150 mA at V
= 50 mA at V
J
V1 = T
= T
= 85°C and R
9°C/W
AMB
V1
J
= 100 mA at V
+R
V2 = T
V2
THC/A
= 1.65 W, P
BAT
V2 Power
THC/A
JCAN
=16 V, we have:
T case (Heatsink)
x 3.3 W = 85 + 18 x 3.3 = 145°C
BAT
6.5°C/W
R THC/A (ECU supplier dependent)
T ambient
=155°C.
= 18°C/W, this gives:
TH
BAT
= 16 V (Excluding CAN
CAN
is represented here by only
= 16 V,
= 0.55 W
CAN Power
R THJ/C =18°C/W
T J (Max 155°C
)
=1.55W
DIFFERENT DEVICE VERSIONS
and also offers slight differences in term of functionalities.
The device version is identified in the device part number by
the first letter after the 389 number. The package
identification is done by the last two letters of the part number
(DW for SO28 wide body, DH for power SO20).
The MC33389 is proposed in several package versions,
Example
Assuming I
I
I
P
System assumptions:
If T
T
and T
V2
CAN
CASE
V1
AMB
Figure 7. SO28WB Simplified Thermal Model
= 45 mA at V
= 0.5 W, P
= 50 mA at V
J
V1 = 124 + 20 x 1.55 = 155°C.
= T
= 85°C and R
AMB
V1
= 45 mA at V
+ R
BAT
V2
Total Power
BAT
THC/A
=0.5 W, P
= 16 V (Excluding CAN consumption).
THC/A
= 16 V, we have:
FUNCTIONAL DEVICE OPERATION
x 1.55 W = 85+25 x 1.55 = 124°C
T
T
R
CASE
BAT
= 25°C/W, this gives:
AMBIENT
R
THJ/C
THC/A
CAN
= 16 V,
T
(pin)
J
= 20°C/W
(Max 155°C)
=0.55 W thus P
TOTAL
33389
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