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33988 데이터시트(PDF) 21 Page - Freescale Semiconductor, Inc

부품명 33988
상세설명  Dual Intelligent High-current Self-protected Silicon High Side Switch (8.0m廓)
PDF  34 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33988 데이터시트(HTML) 21 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
21
33988
FUNCTIONAL DEVICE OPERATION
GROUND DISCONNECT PROTECTION
In the event the 33988 ground is disconnected from load
ground, the device protects itself and safely turns OFF the
output regardless the state of the output at the time of
disconnection. A 10K resistor needs to be added between the
wake pin and the rest of the circuitry in order to ensure that
the device turns off in case of ground disconnect and to
prevent this pin to exceed its maximum ratings
Table 7. Device Behavior in Case of Under-voltage
High Side
Switch
(VPWR Battery
Voltage)
∗∗
State
UV Enable
IN = 0
(Falling VPWR)
UV Enable
IN = 0
(Rising VPWR)
UV Enable
IN
∗∗∗ = 1
(Falling VPWR)
UV Enable
IN
∗∗∗ = 1
(Rising VPWR)
UV Disable
IN = 0
(Falling or
Rising VPWR)
UV Disable
IN
∗∗∗ = 1
(Falling or
Rising VPWR)
VPWR >
VPWRUV
Output State
OFF
OFF
ON
OFF
OFF
ON
FS State
1
1
1
0
1
1
SPI Fault
Register UVF
Bit
0
1 until next read
0
1
0
0
VPWRUV >
VPWR >
UVPOR
Output State
OFF
OFF
OFF
OFF
OFF
ON
FS State
0
0
0
0
1
1
SPI Fault
Register UVF
Bit
1
1
1
1
0
0
UVPOR >
VPWR > 2.5V
∗
Output State
OFF
OFF
OFF
OFF
OFF
ON
FS State
1
1
1
1
1
1
SPI Fault
Register UVF
Bit
1 until next read
1
1 until next read 1 until next read
0
0
2.5V > VPWR >
0V
Output State
OFF
OFF
OFF
OFF
OFF
OFF
FS State
1
1
1
1
1
1
SPI Fault
Register UVF
Bit
1 until next read 1 until next read 1 until next read 1 until next read
0
0
Comments
UV fault is
not latched
UV fault is
not latched
UV fault
is latched
∗ Typical value; not guaranteed
∗∗ While VDD remains within specified range.
∗∗∗ = IN is equivalent to IN direct input or IN_spi SPI input.



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