参数资料
型号: MC33389CDH
厂商: Freescale Semiconductor
文件页数: 14/49页
文件大小: 0K
描述: IC SYSTEM BASIS W/CAN 20-HSOP
标准包装: 30
控制器类型: 系统基础芯片(SBC),CAN
接口: SPI 串行
电源电压: 5V
电流 - 电源: 3.5mA
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 20-SOIC(0.433",11.00mm 宽)裸露焊盘
供应商设备封装: 20-HSOP
包装: 管件
Analog Integrated Circuit Device Data
Freescale Semiconductor
21
33389
FUNCTIONAL DEVICE OPERATION
Figure 6. HSOP-20 Simplified Thermal Model
Example
Assuming IV1 = 100 mA at VBAT = 16 V,
IV2 =150 mA at VBAT = 16 V (Excluding CAN
consumption).
ICAN = 50 mA at VBAT =16 V, we have:
PV1 = 1. 1 W, PV2 = 1.65 W, PCAN = 0.55 W
System assumptions:
If TAMB= 85°C and RTHC/A = 18°C/W, this gives:
TCASE = TAMB+RTHC/A x 3.3 W = 85 + 18 x 3.3 = 145°C
and TJV1 = TJV2 = TJCAN=155°C.
This example represents the limit for the maximum power
dissipation with a HSOP20.
SO28WB Package
The case (pin) to junction RTH is represented here by only
one thermal resistance for the total power because the three
power sources strongly interact on the silicon for such a
package.
Figure 7. SO28WB Simplified Thermal Model
Example
Assuming IV1 = 45 mA at VBAT = 16 V,
IV2 = 45 mA at VBAT = 16 V (Excluding CAN consumption).
ICAN = 50 mA at VBAT = 16 V, we have:
PV1 = 0.5 W, PV2 =0.5 W, PCAN =0.55 W thus PTOTAL
=1.55W
System assumptions:
If TAMB = 85°C and RTHC/A = 25°C/W, this gives:
TCASE = TAMB + RTHC/A x 1.55 W = 85+25 x 1.55 = 124°C
and TJV1 = 124 + 20 x 1.55 = 155°C.
DIFFERENT DEVICE VERSIONS
The MC33389 is proposed in several package 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).
T ambient
T case (Heatsink)
V1 Power
V2 Power
CAN Power
TJ (Max 155°C)
RTHJ/C=18°C/W
6.5°C/W
9°C/W
RTHC/A (ECU supplier dependent)
TCASE (pin)
TJ (Max 155°C)
Total Power
RTHC/A
TAMBIENT
RTHJ/C = 20°C/W
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