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參數資料
| 型號： | MC33486 |
| 廠商： | 飛思卡爾半導體(中國)有限公司 |
| 英文描述： | Dual High Side Switch for H-Bridge Automotive Applications(適合于H橋自動應用的雙高端開關) |
| 中文描述： | 雙通道高邊開關的H -橋汽車應用（適合于?橋自動應用的雙高端開關） |
| 文件頁數： | 8/9頁 |
| 文件大?。?/td> | 392K |
| 代理商： | MC33486 |
MC33486
Dual High Side Switch for H-Bridge Automotive Applications
8
The use of this model is similar to the electrical Ohm law (voltage = resistance X current), where:
. Voltage represents temperature
. Current represents power dissipated by the device
. Resistance represents thermal resistance.
We finally got :
Temperature or delta temperature = Power Dissipation times Thermal resistance, that is :
°
C = W
°
x C/W.
Any node temperature can easily be calculated knowing the amount of power flowing through the thermal resistances.
Example :
1. Numerical value.
. Junction to case thermal resistance : 2
°
C/W (Rthjc)
. Power into the switch : assuming the device is driving 8amps at 150
°
C junction temperature (Rdson at 150
°
C is 40m
) the
total power dissipation is : 0.04*8*8 = 2.56W
. Case to ambient thermal resistance (Rthca) : 20
°
C/W
2. Results.
. Junction to case delta temp : 5
°
C (2.5W x 2
°
C/W)
. Case delta temp from ambient : 50
°
C (20
°
C/W x 2.5W)
. Actual junction temperature node will be :
50
°
C + 5
°
C = 55
°
C above the ambient temperature.
Assuming an 85
°
C ambient temperature, the junction temperature is a t : 85 + 55 = 140
°
C.
The above example take into account the junction to ambient thermal resistance, assuming that the ambient temp is 85
°
C.
In the case where the device plus its printed circuit board are located inside a module, the ambient temp of the module should
be taken into account. Or an additional thermal resistance from inside module to external ambient temperature must be added.
The calculation method remains the same.
The low side block is packaged into D
2
PAK or DPAK package. Thermal resistance junction to case is approx. 2
°
C/W. The
junction to ambient thermal resistance follows the same rules as for the high side block, and is in the same range.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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相關代理商/技術參數 |
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| MC33486ADH | 功能描述:電源開關 IC - 配電 DUALHIGH-SIDE BRIDGE RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33486ADHR2 | 功能描述:電源開關 IC - 配電 DUALHIGH-SIDE BRIDGE RoHS:否 制造商:Exar 輸出端數量:1 開啟電阻（最大值）:85 mOhms 開啟時間（最大值）:400 us 關閉時間（最大值）:20 us 工作電源電壓:3.2 V to 6.5 V 電源電流（最大值）: 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-23-5 |
| MC33486DH | 功能描述:IC SWITCH DUAL H-SIDE 20-HSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 電機和風扇控制器，驅動器 系列:- 標準包裝:1 系列:- 應用:直流電機驅動器，步進電機驅動器 評估套件:- 輸出數:1 或 2 電流 - 輸出:750mA 電壓 - 負載:10 V ~ 40 V 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-BFSOP（0.295"，7.50mm 寬） 供應商設備封裝:24-SOP 包裝:Digi-Reel® 其它名稱:MTS62C19A-HS105DKR |
| MC33493ADTBE | 功能描述:射頻發(fā)射器 UHF TRANSMITTER RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
| MC33493ADTBER2 | 功能描述:射頻發(fā)射器 UHF TRANSMITTER RoHS:否 制造商:Micrel 類型:ASK Transmitter 封裝 / 箱體:SOT-23-6 工作頻率:300 MHz to 450 MHz 封裝:Reel |
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