HIP0080AM(1998) データシートの表示（PDF） - Intersil
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HIP0080AM Datasheet PDF : 15 Pages
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HIP0080, HIP0081
Serial Register Data Sequence
HIP0080, HIP0081The fault data follows the Serial Register
Data Sequence of Table 1 in bit sequence and, in cascade,
by IC sequence. In each of the 4 power switching output
channels, the diagnostic sense circuits set 1-bit in the
parallel diagnostic register for each of the 4 diagnostics
fault conditions. A total of 16 diagnostics data bits are
shifted to the serial register when CS goes low. Table 1
shows the order and sequence of the serial bits as they are
shifted out of DO. The fault action that sets each of the
diagnostics bits for each of the 4 switches is described
below:
HIP0080, HIP0081Bit 1 - indicates a thermal overload
when the sensed junction temperature of the output is
greater than 150oC. When over-temperature is sensed, the
sensor output directly gates-off the drive to the power
output and the respective fault bit is set in the diagnostic
register. When the chip is sufficiently cooled, the output is
gated-on if the input remains ON.
HIP0080, HIP0081Bit 2 - indicates the fault condition for an
output-to-supply short (shorted load). A small value of
resistance (~0.01W) in the source-to-ground line of the
output stage is used to sense the output short. A
comparator senses the voltage level and filters the output
to provide an input to the control stage and to the
diagnostic register. The control state directly shuts down
the output when an over-current condition is sensed. Under
this condition of fault, the input driver is latched off. To
restore the output drive, the short must be removed and the
input toggled OFF and then ON. A short to the supply is the
only error condition that requires an input toggle reset.
HIP0080, HIP0081Bit 3 - indicates the condition of an
output to ground short. As shown in the Functional Block
Diagram, each output stage has drain-to-supply (VCC1)
and drain-to-ground pull-up and pull-down resistors of
approximately 10kW to sense this condition. When the
output is off and the sense level is low, an output-to-ground
short is detected by the comparator. This condition is
sensed when the output is pulled lower than 0.24xVCC
(typical).
HIP0080, HIP0081Bit 4 - indicates the condition of an open
load on the output. The same divider noted for Bit 3 is used
to set the output level. If the sense level is at or near the
mid-range of the voltage supply, VCC1 when the output is in
the off condition, a no-load condition is detected.
TABLE 1. SERIAL REGISTER DATA SEQUENCE
BIT
CHANNEL NO. NO.
FAULT FUNCTION
FAULT
SYMBOL
Switch
1 Over-Temperature
OT1
Channel 1
2 Short to Supply
SB1
3 Short to Ground
SG1
4 Open Load
OI1
Switch
5 Over-Temperature
OT2
Channel 2
6 Short to Supply
SB2
7 Short to Ground
SG2
8 Open Load
OI2
TABLE 1. SERIAL REGISTER DATA SEQUENCE
BIT
CHANNEL NO. NO.
FAULT FUNCTION
FAULT
SYMBOL
Switch
9 Over-Temperature
OT3
Channel 3
10 Short to Supply
SB3
11 Short to Ground
SG3
12 Open Load
OI3
Switch
13 Over-Temperature
OT4
Channel 4
14 Short to Supply
SB4
15 Short to Ground
SG4
16 Open Load
OI4
Serial Peripheral Interface Bus Control
HIP0080, HIP0081Technically, the HIP0080 and HIP0081
fault data has only 16 bits. Except for the Error Flag, DF
data bit shown in Figure 2, the format matches that of a
normal CPOL = 0, CPHA=1 SPI protocol (polarities, phase,
etc). The DF bit from the DO output is active only until the
clock starts. The best way to take advantage of it (if
desired) is to connect the DO to the SPI bus, and also to a
port pin, or other logic input. After CS goes low and before
the SPI clocks starts, the DF bit can be read. If it is a zero,
then the rest of the data does not have to be read. (The
data will be all 0's = no errors). If the DF bit = 1, then the
data must be read to find out which bit(s) is set.
HIP0080, HIP0081Mutiple ICs can be cascaded such that
an error bit on any IC will daisy chain up to the last DO; this
allows the microcontroller to "wire-OR" all of the devices
automatically. Other than bidirectional data IC types,
different IC types may be cascaded. The HIP0080 or
HIP0081 should be closest to the microcontroller to use the
DF bit feature. ICs that do not have an OR’ed means of
passing fault bit would require all data be clocked to check
the diagnostic bits.
Clamp Energy Ratings for the HIP0080
and HIP0081
HIP0080, HIP0081Figures 4 and 5 define the Single Pulse
Energy ratings for the HIP0080 and HIP0081. Refer to
Application Note AN9416 for further information on Single
Pulse Energy ratings for inductive load operation and
Dissipation capability for the 15 pin Power SIP Package.
The Device Under Test conducts when the zener over
voltage clamp turns on the output. While drain-to-source
voltage, VDS and and drain current, ID are monitored, the
current drive pulse width, tON in seconds is varied to
determine the Single Pulse Energy capability. The energy
in Joules is calculated from the following equation:
HIP0080, HIP0081Single Pulse Energy = VDS x ID x tON.
HIP0080, HIP0081Refer to Application Note 9416 for
further information on Single Pulse Energy ratings for
inductive load operation and Dissipation capability for the
15 pin Power SIP Package.
7
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