参数资料
| 型号： | NCV7608DWR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 18/27页 |
| 文件大小： | 0K |
| 描述： | IC DVR LO/HI SIDE 8CH 28-SOIC |
| 标准包装： | 1,000 |
| 类型： | 高端/低端，H 桥 |
| 输入类型： | SPI |
| 输出数： | 8 |
| 导通状态电阻： | 1.2 欧姆 |
| 电流 - 峰值输出： | 350mA |
| 电源电压： | 3.15 V ~ 5.25，5.5 V ~ 28 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 28-SOIC |
| 包装： | 带卷 (TR) |
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NCV7608
Start
No
Driver ON Yes
Current
Limit
Yes
TFOC
Over
Current
Yes
Report
Fault
Latch Fault
Fault Reported on SO
No
No
No
No
Open Load
Yes
Thermal
Warning
Yes
Delay
Thermal
Warning
Yes
CSB Lo w
Yes
Report
Fault
Fault Reported on SO
TFOL
No
No
No
Thermal Yes
Shutdown
Delay
Thermal Yes
Shutdown
Report
Fault
Latch Fault
Fault Reported on SO
No
CSB Lo w
Yes
No
No
Report
Fault
VS Power
Supply Fail
Yes
Delay
VS Power r
Supply Fail Yes
Report
Fault
Latch Fault
Fault Reported on SO
No
Fault Reported on SO
Figure 26. Fault Reporting Flow Chart
Fault Filters
The NCV7608 detects overtemperature, over current, VS
Power Supply and open load faults. Faults are reported in the
Output Data fault register. The fault filter timer for over
current or open load is 100 m s (typ). An over current or open
load event must exist for this period of time to be recognized.
There are eight fault timers, one dedicated to each driver for
use for both over current and open load. Thermal Warning,
Thermal Shutdown and VS Power Supply Fail each have
there own dedicated timers.
Open Load
Open Load conditions are detected in the off mode. See
“OFF ? Mode Open Load Diagnostics” for details.
Over Current
The output current is limited in both high ? side and
low ? side configuration. Over Current is detected in the turn
on mode. High power dissipation during over current can
cause overtemperature shutdown. Over Current is a latched
off event. Latching off a driver in over current is especially
useful in systems utilizing a hierarchical software
architecture whereby the microprocessor sends a command
(such as turning a device on when a short circuit exists) and
then proceeds to other focused microprocessor activity.
Eliminating an auto retry upon over current fault detection
scheme reduces IC stress by reducing the frequency of
attempts to turn back on.
Thermal Warning & Overtemperature Shutdown
Four independent Overtemperature shutdown circuits are
featured (one common sensor for each drive pair). Channels
are sequentially paired together with its own thermal
detection circuit as Channels 1 and 2, Channels 3 and 4,
Channels 5 and 6, and Channels 7 and 8. Each thermal
detection circuit senses two temperature levels, one to give
a Thermal Warning (145 ° C typ) (TW, bit = 0), and one to
shut the driver pair off (Overtemperature) at a higher
temperature 30 ° C above TW (175 ° C typ). When the thermal
detection circuit reaches the temperature point of Thermal
Warning, the output data bit 0 (TW) will be set to a 1, and the
outputs will remain on. Overtemperature events will be
recorded as faults to the offending Output Driver pair
http://onsemi.com
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