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參數資料
| 型號： | ADUM7234BRZ |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 外設及接口 |
| 英文描述： | Isolated Precision Half-Bridge Driver, 4 A Output, 16 Pin SOIC, Ind Temp |
| 中文描述： | 4 A HALF BRIDGE BASED PRPHL DRVR, PDSO16 |
| 封裝： | ROHS COMPLIANT, MS-012AC, SOIC-16 |
| 文件頁數： | 12/12頁 |
| 文件大小： | 266K |
| 代理商： | ADUM7234BRZ |
ADuM7234
Rev. A | Page 9 of 12
GND1
VDD1
ΔV
Δt
ΔV
Δt
5V
GND1
VDD1
15V
GNDA AND GNDB
VDDA AND VDDB
5V
GNDA AND GNDB
VDDA AND VDDB
15V
07
99
0-
00
6
Figure 11. Common-Mode Transient Immunity Waveforms, Input to Output
GNDA/GNDB
VDDB/VDDA
ΔV
Δt
ΔV
Δt
15V
GNDA/GNDB
VDDA/VDDB
15V
GNDA/GNDB
VDDA/VDDB
15V
GNDB/GNDA
VDDB/VDDA
15V
07
99
0-
00
7
Figure 12. Common-Mode Transient Immunity Waveforms,
Between Outputs
GNDA/GNDB
VDDA/VDDB
GNDA/GNDB
ΔVDD
Δt
07
99
0-
0
08
Figure 13. Transient Immunity Waveforms, Output Supplies
INSULATION LIFETIME
All insulation structures eventually break down when subjected to
voltage stress over a sufficiently long period. The rate of insulation
degradation depends on the characteristics of the voltage waveform
applied across the insulation. In addition to the testing performed
by the regulatory agencies, Analog Devices conducts an extensive
set of evaluations to determine the lifetime of the insulation struc-
ture within the ADuM7234.
Analog Devices performs accelerated life testing using voltage
levels higher than the rated continuous working voltage. Acce-
leration factors for several operating conditions are determined.
These factors allow calculation of the time to failure at the
actual working voltage. Table 3 lists the peak voltage for 50
years of service life for a bipolar ac operating condition and the
maximum Analog Devices recommended working voltage. In
many cases, the approved working voltage is higher than the 50-
year service life voltage. Operation at these high working
voltages can lead to shortened insulation life in some cases.
The insulation lifetime of the ADuM7234 depends on the
voltage waveform type imposed across the isolation barrier.
The iCoupler insulation structure degrades at different rates
depending on whether the waveform is bipolar ac, unipolar
different isolation voltage waveforms.
Bipolar ac voltage is the most stringent environment. The goal
of a 50-year operating lifetime under the ac bipolar condition
determines the maximum working voltage recommended by
Analog Devices.
In the case of unipolar ac or dc voltage, the stress on the insu-
lation is significantly lower. This allows operation at higher
working voltages while still achieving a 50-year service life.
The working voltage listed in Table 3 can be applied while
maintaining the 50-year minimum lifetime provided the voltage
conforms to either the unipolar ac or dc voltage cases. Any cross
insulation voltage waveform that does not conform to Figure 15
or Figure 16 should be treated as a bipolar ac waveform, and its
peak voltage should be limited to the 50-year lifetime voltage
is shown as sinusoidal for illustration purposes only. It is meant
to represent any voltage waveform varying between 0 V and
some limiting value. The limiting value can be positive or
negative, but the voltage cannot cross 0 V.
0V
RATED PEAK VOLTAGE
079
90
-0
09
Figure 14. Bipolar AC Waveform
0V
RATED PEAK VOLTAGE
07
99
0
-01
0
Figure 15. Unipolar AC Waveform
0V
RATED PEAK VOLTAGE
07
99
0-
01
1
Figure 16. DC Waveform
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| ADUM7240ARZ-RL7 | 功能描述:ISOLATOR DGTL 1KVRMS 2CH 8SOIC RoHS:是 類別:隔離器 >> 數字隔離器 系列:* 產品培訓模塊:IsoLoop® Isolator 標準包裝:50 系列:IsoLoop® 輸入 - 1 側/2 側:5/0 通道數:5 電源電壓:3 V ~ 5.5 V 電壓 - 隔離:2500Vrms 數據速率:110Mbps 傳輸延遲:12ns 輸出類型:CMOS 封裝/外殼:16-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:16-SOIC N 包裝:管件 工作溫度:-40°C ~ 85°C 其它名稱:390-1053-5 |
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