HIP0081AS1 Intersil, HIP0081AS1 Datasheet - Page 7

• Manufacturer Part Number: HIP0081AS1
• Manufacturer: Intersil

Specifications of HIP0081AS1

• Lead Free Status / RoHS Status: Supplier Unconfirmed

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:
Bit 1 - indicates a thermal overload when the sensed junction
temperature of the output is greater than 150
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.
Bit 2 - indicates the fault condition for an output-to-supply short
(shorted load). A small value of resistance (~0.01 ) 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.
Bit 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 10k
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).
Bit 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, V
condition, a no-load condition is detected.
Switch
Channel 1
Switch
Channel 2
Switch
Channel 3
Switch
Channel 4
CHANNEL NO.
TABLE 1. SERIAL REGISTER DATA SEQUENCE
CC
NO.
BIT
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
1 when the output is in the off
Over-Temperature
Short to Supply
Short to Ground
Open Load
Over-Temperature
Short to Supply
Short to Ground
Open Load
Over-Temperature
Short to Supply
Short to Ground
Open Load
Over-Temperature
Short to Supply
Short to Ground
Open Load
FAULT FUNCTION
7
o
C. When over-
SYMBOL
FAULT
to sense
OT1
SB1
SG1
OT2
SB2
SG2
OT3
SB3
SG3
OT4
SB4
SG4
HIP0080, HIP0081
OI1
OI2
OI3
OI4
Serial Peripheral Interface Bus Control
Technically, 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.
Multiple 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
Figures 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 drain current, ID are monitored, the current
drive pulse width, t
Single Pulse Energy capability. The energy in Joules is
calculated from the following equation:
Single Pulse Energy = VDS x ID x t
Refer 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.
ON
in seconds is varied to determine the
ON
.