80310 Datasheet, PDF (15/31 Pages) Freescale Semiconductor, Inc – Alternator Regulator with LIN High side field driver

FUNCTIONAL DEVICE OPERATION
STATE MACHINE
LRC mode is active until the detection of phase stop
regulating RPM (f_STOP). In this case, the device goes back to
the pre-excitation mode. If the phase frequency reaches the
LRC disable RPM default (f_LRC), the device goes into
regulation without LRC.
REGULATION WITHOUT LRC:
This mode is active when the phase frequency is above
the LRC disable RPM default (f_LRC), the first V_REG was
reached with LRC.
The excitation is controlled only by the internal comparator
of B+A and V_REG. The DC can not be lower than DC_MIN.
If the phase frequency goes below the LRC disable RPM
default (f_LRC), then the 80310 comes back to the regulation
.
S tand b y
with LRC mode. If the phase frequency goes below the phase
stop regulating RPM, the device goes to pre-excitation mode.
RE-REGULATION:
The excitation is forced to 100%. This mode is active if
there is no high phase on non active phase (PHx < V_PH) in
the previous cycle, until the high phase comes back. At the
end of the 8^th cycle, if there is still no high phase, the
regulation mode is set off and the device goes back to the
regulation mode with or without LRC.
B+A is lower than V_REG. In any case, DC cannot be lower
than DC_MIN.
- POR
- L IN Tim eo ut with no Ph ase
- L IN M ID 3 C if n vm _ lin _spe cial
Edge on Phase
. Re start tim er 10 0m s
L IN C om m a nd with V reg <> 1 0.6 V:
- MID 29 if n vm _ALT1
- MID 2A if nv m _ALT2
- M ID 2B if n vm _lin _sp ec ial
W ake-u p on
P hase
T im e ou t 100 m s
Ph ase > Star t_ aa
. R estart timer 1 00 ms
EX C 100% DC
Time o ut 100 ms
Hig h Ph ase 1
ap pears
PR E-EXC
Ph ase < Stop
P hase < Sto p
P ha se > Start
REGULATION w LRC
Ph ase < L R C
Phase > LRC
an d first Vreg reached
with L R C
No High Ph ase1 in th e
pr ev io us cycle an d P hase
Regu lation is ON
Ph as e
REG ULAT ION
(High Phase1 appears) o r
(1 00% DC du rin g 8 cyc les = > Pha se
Re gu la tion se t OF F)
REG ULAT ION w/o LRC
No Hig h Ph ase 1 in th e
pr eviou s cycle an d Ph ase
Re gu la tion is ON
(High P hase1 ap pear s) or
(10 0% DC d uring 8 cycles =>
Phase Regulation set OFF)
P hase
REGU LATION
Figure 10. Self-start State Machine
This state machine runs only if self-start option has been
programmed.
The device needs a small amount of quiescent current to
feed some functions such as oscillator.
STANDBY:
The 80310 is in Standby mode if there is a LIN timeout,
and in absence of alternator rotation (no phase), if power and
reset (POR), or with a LIN MID3C command, if
nvm_lin_special is set.
• There is no excitation
• The duty cycle (DC) is equal to zero
LIN timeout means:
• No activity on the LIN bus during a specified time
• or on a LIN watchdog timeout during a specified time
WAKE-UP:
This state is reached when an edge is detected on the
phase (Phase voltage > Phase sensitivity)
• The logic is out of reset
Analog Integrated Circuit Device Data
Freescale Semiconductor
80310
15