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参数资料
| 型号： | MC33291L |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | Eight Output Switch with Serial Peripheral Interface I/O(带SPI接口的八输出开关) |
| 中文描述： | 8个串行外围接口的I / O（带的SPI接口的八输出开关输出开关） |
| 文件页数： | 2/24页 |
| 文件大小： | 633K |
| 代理商： | MC33291L |
33291L
2
Go to: www.freescale.com
Figure 1. 33291L Simplified Block Diagram
V
PWR
21
Gate
Control
Open
Load
Detect
Short
Circuit
Detect
Over
Temperature
Detect
Over
Voltage
Voltage
Regulator
Serial D/O
Line Driver
OVD
V
DD
RB
SFPD
SFL
CS
SCLK
SI
SO
CSI
CSBI
GE
OT
SF
OF
SPI
Interface
Logic
+
–
Fault Timers
+
+
+
10 μA
25 μA
10 μA
Bias
To Gates
1 to 7
Output 0
24
Outputs 1 to 7
2
11 - 14
23
From Detectors 1 to 7
Grounds 5-8
17-20
R
S
l
Limit
53 V
V
DD
SFPD
RST
CS
SCLK
SI
SO
16
15
22
10
3
4
9
10 μA
10 μA
FAULT OPERATION
Serial Output (SO) Pin Reports
Over Voltage
Over voltage condition reported
Over Temperature
Fault reported by Serial Output (SO) pin
Over Current
SO pin reports short to battery/supply or over current condition
Output ON, Open Load Fault
Not reported
Output OFF, Open Load Fault
SO pin reports output OFF open load condition
Device Shutdowns
Over Voltage
Total device shutdown at V
PWR
= 28 to 36 V. All outputs are latched off while the SPI register is reset (cleared).
Outputs can be turned back on with a new SPI command after V
PWR
has decayed below 26.5 V.
Over Temperature
Only the output experiencing an over temperature condition turns OFF.
Over Current
Only the output experiencing an over current shuts down at 1.0 to 3.0 A after a 70 to 250 μs delay, with SFPD pin
grounded. All other outputs will continue to operate in a current limit mode, with no shutdown, if the SFPD pin is at
5.0 V (so long as the individual outputs are not experiencing thermal limit conditions).
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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