NCV7361A 데이터 시트보기 (PDF) - ON Semiconductor
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NCV7361A Datasheet PDF : 27 Pages
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NCV7361A
FUNCTIONAL DESCRIPTION
The NCV7361A consists of a low drop voltage regulator
5.0 V/50 mA and a LIN Bus transceiver, which is a
bidirectional bus interface for data transfer between the
LIN bus and the LIN protocol controller.
Additionally, the NCV7361A features a RESET output
with a reset delay of 100 ms and a fixed threshold of 4.65 V
and Enable (EN) control for the regulator.
Operating Modes
The NCV7361A provides two main operating modes
“normal” and “sleep” and the intermediate states “POR”,
“Ini−state” and “thermal shutdown”. The main modes are
fixed states defined by basic actions (VSUP start, EN or
wake−up). The intermediate states are soft states. They
aren’t defined by logical actions but by changes of voltage
(VSUP, VOUT) or junction temperature.
VSUP POWER ON
POR
Clear All State−FF
VSUP > UVR_OFF
Clear RESET Timer
Regulator ON VOUT Ramp Up
RESET = L
Wake−Up Disabled
VSUP < UVR_ON
VSUP < UVR_ON
Ini−state
VSUP > UVR_OFF and
(EN = L/H or Bus Wake−Up)
VOUT > VRES (4.65 V)
VOUT < VRES
EN = H
Normal
Mode
Regulator ON
RESET = L after 100 ms
RESET = H
Wake−Up Disabled
LIN Transceiver ON
EN = L
Sleep
Mode
EN = H/L
Sleep Mode and
TJ < TJREC
Normal Mode and
TJ < TJREC
Normal Mode and
TJ > TJSHD
Sleep Mode and
TJ < TJSHD
Regulator OFF
Wake−Up Enabled (LIN Receiver ON)
LIN Transmitter OFF
Thermal
Shutdown
TJ < TJREC
Regulator OFF
Wake−Up Disabled
LIN Transceiver OFF
Figure 15. State Diagram of Operating Modes
Normal Mode
The whole NCV7361A is active. Switching to normal
mode can be done via the following actions:
• Start of VSUP or after Undervoltage Reset
• Rising Edge at EN (EN = High) (Local Wake−Up)
• Activity on the LIN Bus (Remote Wake−Up)
Sleep Mode
Sleep mode is most current saving. With a falling edge
on EN (EN = Low) the NCV7361A is switched from
normal mode into sleep mode. The voltage regulator will
be switched off and the LIN transceiver is in
recessive state.
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