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PDF HI-8431 Data sheet ( Hoja de datos )
| Número de pieza | HI-8431 | |
| Descripción | Supply / Open Driver | |
| Fabricantes | HOLTIC | |
| Logotipo |  |
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November 2015
HI-8430, HI-8431
8-Channel, Ground /Open, or Supply / Open Sensor
4-channel 200 mA Supply / Open Driver
GENERAL DESCRIPTION
The HI-8430 is a combined 8-channel discrete-to-digital
sensor and quad high side driver fabricated with Silicon-
on-Insulator (SOI) technology for robust latch-up free
operation. Sense detection can either be GND/Open or
Supply/Open as configured by the SNSE_SEL pin.
Supply/Open sensing is also referred to as 28V/Open
sensing. The sensing circuit window comparator
thresholds can be fixed at the internal programmed values
or can be set externally at the HI_SET and LO_SET pins,
as selected by the THS_SEL pin. The digital SENSE
outputs can be tri-stated by taking the OE pin high.
All sense inputs are internally lightning protected to
DO160G, Section 22, Cat AZ, BZ and ZZ without external
components.
The HI-8430 also offers four high side switches each
capable of sourcing 200 mA of current. Each switch
transistor is controlled by its own digital input pin and is fully
fault protected. Over-current conditions, such as a short
circuit, are detected and inhibited while signaling the fault
condition at the corresponding logic output. These four
FAULT outputs are also available in a combined OR output.
The outputs are fully protected from transients when
driving relays.
The HI-8431 is a smaller, reduced pin version of the HI-
8430 and is available in a 32-pin PQFP or 5mm x 5mm
QFN. It has all the features of the HI-8430 except the
individual fault detection outputs, tri-state pin selection and
fixed internal thresholds.
Interface to the digital subsystem is simple CMOS logic
inputs and outputs. The logic pins are compatible with 5V
or 3.3V logic allowing direct connection to a wide range of
microcontrollers or FPGAs.
· Airbus ABD0100H compliant sense inputs
· 4 High-Side 200 mA Drivers
· 4.5 Ohm On Resistance VLOGIC Inputs Control 5V to
36V High Side Drivers
· Over-Current Fault Detection Signaled by Logic Output
· Max Power Dissipation Automatically Limited by Fault
Protection
· Diode Clamps for Discharging Inductive Loads
APPLICATIONS
· Avionics Discrete to Digital Sensing
· Relay Driver
· Lamp driver
· Discrete Signaling
PIN CONFIGURATIONS
VWET - 1
SENSE0 - 2
SENSE1 - 3
SENSE2 - 4
SENSE3 - 5
SENSE4 - 6
SENSE5 - 7
SENSE6 - 8
SENSE7 - 9
OE - 10
HI-8430PCI
HI-8430PCT
HI-8430PCM
30 -
29 - FAULT_0
28 - DRV_0
27 - DRV_1
26 - FAULT_1
25 - VDRV
24 - FAULT_2
23 - DRV_2
22 - DRV_3
21 - FAULT_3
40 Pin Plastic 6mm x 6mm
Chip-scale package
FEATURES
· Robust CMOS Silicon-on-Insulator (SOI) technology
· 8-channel Selectable Sense Operation, GND/Open
or Supply/Open
SENSE0 - 1
SENSE1 - 2
SENSE2 - 3
SENSE3 - 4
SENSE4 - 5
SENSE5 - 6
SENSE6 - 7
SENSE7 - 8
HI-8431PCI
HI-8431PCT
HI-8431PCM
24 - DSEL_3
23 - DRV0
22 - DRV1
21 - VDRV
20 - DRV_2
19 - DRV_3
18 - FAULT_OR
17 - GND
· Selectable Thresholds and Hysteresis
· Sense Detection Range 3V to 20V
· Logic Operation from 3.0V to 5.5V
· Lightning Protected Sense Inputs
(DS8430 Rev. F)
32 Pin Plastic 5mm x 5mm
Chip-scale package
(See page 14 for leaded QFP package options)
HOLT INTEGRATED CIRCUITS
www.holtic.com
11/15
1 page  
HI-8430, HI-8431
FUNCTIONAL DESCRIPTION
Table 2. Configuration options and allowed threshold values -55C to 125C.
VLOGIC
VWET SNSE_ THS_
Pin SEL SEL
Operation
Threshold
Selected
Maximum
HI_SET
(VTHI =
HI_SETx10)
Minimum
LO_SET
(VTLO =
LO_SETx10)
Guaranteed
High
Threshold
Guaranteed
Low
Threshold
3.0V
8V
L
L GND/OPEN
Internal
-
-
3.0V
1.0V
3.6V
8V
L
L GND/OPEN
Internal
-
-
3.25V
1.0V
3.3V
28V
L
L GND/OPEN
Internal
-
-
3.0V
1.0V
3.0V to 3.6V 8V
L H GND/OPEN External 0.4V (4.0V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
3.0V to 3.6V 28V
L H GND/OPEN External 2.0V (20V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
3.0V to 3.6V OPEN
H
L V+/OPEN
Internal
-
-
18.0V
9.0V
3.0V to 3.6V OPEN
H
H V+/OPEN
Exernal
2.2V (22V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
4.5V
OPEN
L
L GND/OPEN
Internal
-
-
3.5V
1.0V
5.5V
5.0V
OPEN
28V
L
L
L GND/OPEN
L GND/OPEN
Internal
Internal
-
-
-
4.0V
1.0V
-
4.0V
1.0V
4.5V to 5.5V 7V
L H GND/OPEN External 0.4V (4.0V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
4.5V to 5.5V 28V
L H GND/OPEN External 2.0V (20V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
4.5V to 5.5V OPEN
H
L V+/OPEN
Internal
-
-
18.0V
9.0V
4.5V to 5.5V OPEN H H V+/OPEN External 2.2V (22V) 0.3V (3.0V) VTHI + 25% VTLO - 25%
NOTE: VTHI = Sense pin high threshold (HI_SET x 10), VTLO = Sense pin low threshold (LO_SET x 10)
OUTPUT ENABLE
OVER-CURRENT SHUTDOWN
The output enable pin, OE, available on the HI-8430, tri-
states all Sense Outputs and High Side Driver Fault Outputs
to allow connecting the tri-state outputs in parallel with other
tri-stated chips. The OE pin has a pull-down and when left
open will cause these digital outputs to be driven to their logic
levels. If the OE pin is High, these digital outputs are high
impedance.
OUTPUT DRIVERS
HIGH SIDE DRIVERS
Both product versions offer four High Side Drivers. Each
driver (PMOS switch) is capable of sourcing a minimum of
200mA while exhibiting a Ron of 4.5Ω typical. VDRV, the high
side rail, may range from 5V to 36V independent of VLOGIC,
which may range from 3V to 5.5V. Each output has diode
clamps for protection during inductive kick-back for relay
applications. Off-state leakage is typically less than 10nA at
room temperature. The inputs, DSEL0 through DSEL3, have
internal pull-downs which hold off the drivers until logic highs
are presented.
Maximum DC power dissipation per driver is
approximately 0.5W at room temperature. Conditions that
would cause the power to exceed this amount will result in
a shut down of the driver. Over-current shutdown is
initiated when the driver pin voltage is more than
approximately 1.5V from the VDRV rail. However there is a
delay of approximately 11μsec before the shutdown
actually occurs giving the driver an opportunity to charge
capacitive loads and thereby avoid shutdown. Similarly, if
the driver is on and a high load is suddenly switched on,
the over-current shutdown will be delayed in activation.
Note that even when the over-current fault condition is
present, the driver pin is still sourcing a few milliamps. This
low current condition continues until the input is taken low
or the load is removed.
FAULT CONDITIONS
Each driver has a converter that translates an over-current
detection into a logic high output at its FAULT output. The
FAULT_OR output goes high if one or more FAULT outputs
are high. These outputs can be tri-stated by setting OE
high.
HOLT INTEGRATED CIRCUITS
5
5 Page 
HI-8430, HI-8431
D.C. ELECTRICAL CHARACTERISTICS (cont)
VDD = 3.3V or 5V, GND = 0V, TA = Operating Temperature Range (unless otherwise specified).
PARAMETER
SYMBOL
CONDITION
DISCRETE INPUTS
SENSE GND/OPEN
Resistance in series with diode to VLOGIC
Resistance in series with diode to VWET
Case 1: THS_SEL = GND
Ground State Input Voltage
Open State Input Voltage
RIN
RW
Internal Threshold Mode
VGS Input voltage to give High output
VOS Input voltage to give Low output
VDD = 5.5V
VDD = 3.0V
Input Current at 0V
Hysteresis
Case 2: THS_SEL = Open or VLOGIC
IIN28
VIN = 0V, VDD = 3.0V
VIN = 0V, VDD = 5.5V
VHY
HI_SET/LO_SET pins set Thresholds
HI_SET Threshold Range
VTHI HI Threshold is set to HI_SET X 10
MIN TYP MAX UNITS
3.3
23.8
kΩ
kΩ
1.0
4.0
3.0
-0.65
-1.65
0.15
V
V
mA
mA
V
0.4 2.0 V
LO_SET Threshold Range
Min Threshold Window
Sense Threshold Accuracy
LOGIC INPUTS
Input Voltage
Input Current, OE, DSEL_n
Input Current, THS_SEL
Input Current, SNSE_SEL
VTLO LO Threshod is set to LO_SET X 10
VTHW
HI_SET > LO_SET
Voltage referred to the sense input, see
table 2
0.3
0.1
VTLO - 25%
1.9 V
VTHI + 25%
V
V
VIH Input Voltage HI
VIL Input Votage LO
ISINK VIN = VLOGIC, 30kΩ pull down
ISOURCE VIN = GND
ISINK
VIN = VLOGIC
ISOURCE VIN = GND , 30kΩ pull up
ISINK VIN = VLOGIC
ISOURCE VIN = GND,
80%
VLOGIC
20%
VLOGIC
125 μA
0.1 μA
0.1 μA
125 μA
0.1 μA
0.1 μA
HOLT INTEGRATED CIRCUITS
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet HI-8431.PDF ] | |
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