The ISL72813SEHEV1Z evaluation board was designed to
provide a quick and easy method for evaluating the
ISL72813SEH
, 32-channel driver circuit IC. This device is a
unique IC. To use this evaluation board properly requires a
thorough knowledge of the operation of the IC. Refer to the
ISL72813SEH
datasheet for an understanding of the functions
and features of the device.
The Intersil ISL72813SEH device is a radiation hardened,
high-voltage, high-current 32-channel driver circuit with an
integrated decoder for driving and selecting between a bank of
relays in space applications. It is fabricated using Intersil’s
proprietary PR40 silicon-on-insulator process technology to
mitigate single-event effects. This device integrates 32 current
drivers that feature high-voltage, common-emitter and
open-collector outputs with a 42V breakdown voltage and
peak current rating of 600mA.
Specifications
The evaluation board has been configured and optimized for
the following conditions:
•V
= 5V
CC
= -34V
•V
EE
• Collector output (Cx) load to GND of ≥58Ω (≤600mA)
• Board temperature: +25°C
Key Features
• Toggle switches for easy control of logic pins
• LED circuitry for quick functional testing
• Convenient test points and connections for test equipment
• MCU interface connector for control of logic
• Banana jacks for power and ground connections
Related Literature
• For a full list of related documents, visit our website
- ISL72813SEH Datasheet
Ordering Information
PART NUMBERDESCRIPTION
ISL72813SEHEV1ZISL72813SEH evaluation board
February 24, 2017
UG096.1
1
FIGURE 1. ISL72813SEHEV1Z BLOCK DIAGRAM
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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Page 2
User Guide 096
Quick Start
1. Verify that jumpers J0 - J31 are installed on the board. This
connects the LED circuitry to each of the driver channels.
2. Put all of the toggle switches (SW0 A0, SW1 A1, SW2 A2,
SW3 A3, SW4 A4, and SW5 EN) in the down position. This
connects the A0 - A4, and EN logic pins of the IC to ground.
3. Apply 5VDC at the VCC banana jack.
4. Apply -30VDC at the VEE banana jack.
5. Move the SW5 EN toggle switch to the up position (EN = VCC)
to enable the current driver. The LED for the C0 channel will
light up indicating channel C0 is ON.
6. Move the SW0 A0 toggle switch to the up position. The LED for
the C1 channel will light up indicating that channel C1 is ON.
7. Adjust the toggle switches to cycle through the various 32
driver channels by changing the logic at the A0 - A4 pins per
the truth table on page 5 of the ISL72813SEH
datasheet.
Introduction
The ISL72813SEHEV1Z evaluation board is designed to provide a
quick and easy method for evaluating the ISL72813SEH
radiation hardened 32-channel current driver IC.
A picture of the evaluation board for ISL782813SEHEV1Z is
shown in Figure 3 on page 6
CLCC IC is soldered onto the evaluation board. It is located in the
center of the board and is designated as U1.
The Intersil ISL72813SEH device has 32 current driver channels.
It was specifically designed to drive the coils of a bank of relay
circuits. Only one channel is active at a time. A channel is
selected by the logic level applied at the A0 - A4 logic pins. It has
an enable pin (EN) that can deactivate all the channels when it is
driven LOW. A channel can drive a relay coil that requires up to
530mA of current. The part was designed to operate in the harsh
environment of space.
This user guide will guide the user through the process of
configuring and using the evaluation board to evaluate the
ISL72813SEH device.
. The ISL72813SEHL/PROTO 44 Ld
Functional Description
The ISL72813SEHEV1Z evaluation board provides a simple
platform to demonstrate the features and evaluate the
performance of the ISL72813SEH IC. It provides easy access to
the pins of the ISL72813SEH IC and convenient connectors/test
points for connecting test equipment. The schematic, bill of
materials, and top silkscreen for the board are available on
pages 9
Figures 13
ISL72813SEHEV1Z evaluation board and basic lab equipment.
The sections that follow will discuss using the evaluation board.
through 11.
through 15 show performance data taken using the
Basic Layout of Evaluation Board
The basic layout of the evaluation board is as follows: Refer to
Figure 3 on page 6
board.
Located in the center of the board is the IS72813SEHL/PROTO
driver circuit IC (U1). The evaluation board has a Pin 1 dot, to
show how the IC should be oriented onto the evaluation board.
The IC Pin 1 indicator lead needs to be aligned with the
evaluation board Pin 1 dot indicator. The board comes with the IC
soldered onto the board.
Power for the IC is located at the left side of the board through
banana jacks labeled VEE, GND, and VCC. A negative DC voltage
source of -10V to -34V must be connected between VEE and GND
to power the common emitter of the current channels. A DC
voltage source of 3V to 5.5V must be connected between VCC
and GND to power the logic decoder and the level shifter of the
part.
Access to the 32 collector driver channels is through the C0 - C31
silver turret posts. The relay load or resistor simulating the relay
load would be connected at theses pins. Each pin in parallel to
the turret post has an LED and resistor that can be connected
through a jumper to check the functionality of the device. With
jumpers J0 thru J31 installed the LED circuitry will be connected
to the C0 thru C31 open collectors of the part and when a
channel is active (turned ON), the LED will light up.
Control of the logic pins A0 - A4 and the EN pin is by the toggle
switches labeled SW0 A0, SW1 A1, SW2 A2, SW3 A3, SW4 A4,
and SW5 EN located at the middle left side of the evaluation
board. In addition to the switches, the logic can be controlled
through the 24 pin right angle header connector labeled “MCU
INTERFACE”. When using this connector, the toggle switches
should be switched into the up position. Finally, the logic can be
controlled by connecting the user’s logic drivers at the PA0 (A0),
PA1 (A1), PA2 (A2), PA3 (A3), PA4 (A4), and PEN (EN) turret pins.
When driving these pins, the toggle switches need to be in the up
position. These turret pins can also be used to monitor the
voltage levels at the logic pins with a voltmeter or oscilloscope.
Refer to the board schematic (Figure 5 on page 8
reference designators of the jumpers, resistors, and connectors
associated with each I/O.
VCC Power Supply
The ISL72813SEH device requires a VCC DC voltage supply in the
range of 3.0V to 5.5V for proper operation. The VCC powers the
logic circuitry of the IC.
The VCC power supply is connected at banana jacks VCC and
GND. The power supply should be capable of delivering 100mA
of current.
VEE Power Supply
The ISL72813SEH device requires a negative VEE DC voltage
supply in the range of -5V to -34V. The VEE voltage is connected
to the common emitter of the 32 current drivers.
The power supply is connected at banana jacks VEE and GND.
The power supply should be capable of delivering 1A of current.
or the actual ISL72813SEHEV1Z evaluation
) for the
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2
UG096.1
February 24, 2017
Page 3
User Guide 096
Logic Control
The ISL72813SEH IC has six logic control input pins; A0 - A4 (Pins
19 - 23) and EN (Pin 25).
The Logic 1 V
Logic 0 VIL level is from 0.8V to 0V. The VCC voltage can be 3.0V
to 5.5V.
The A0 - A4 digital input pins select between the 32 current
driver circuit channels per the truth table on page 5 of the
ISL72813SEH datasheet. The selected channel is activated when
the EN pin is HIGH (Logic 1).
The EN digital input enables and disables the current driver
channels. When EN = LOW (Logic 0) all channels are deactivated
(OFF). When EN = HIGH (Logic 1) then the channel selected by
the logic levels at A0 - A4 is activated (ON).
DESIGNATORDESCRIPTION
SW0 A0Toggle switch for logic input A0
SW1 A1Toggle switch for logic input A1
SW2 A2Toggle switch for logic input A2
SW3 A3Toggle switch for logic input A3
SW4 A4Toggle switch for logic input A4
SW5 ENToggle switch for logic input EN
CO - C31Open collector outputs load connections or test points
LED0 - LED31LEDs for quick functional testing of the ISL72813SEH IC
R0 - R31Load resistor for the LEDs
D0 - D31Schottky diode across the LED circuitry to clamp positive transients during switching between channels
J0 - J31Jumpers to connect LED circuitry to the open collector channel
level for the logic pins is from 2.0V to VCC. The
IH
TABLE 2. BOARD COMPONENT DEFINITIONS
U1ISL72813SEHL/PROTO CLCC IC
VCCVCC power supply connection (5V
GNDGround connection
VEECommon emitter supply connection (-34V
DC
)
DC
)
Test Points
The board has various test points for ease of connecting probes
to make measurements. The test points available are described
in Table 1
.
TABLE 1. TEST POINTS
DESIGNATORDESCRIPTION
PG1 - PG4Ground test point
PA0A0 logic input test point
PA1A1 logic input test point
PA2A2 logic input test point
PA3A3 logic input test point
PA4A4 logic input test point
PENEN logic input test point
PC0 - PC31Open collector output test points
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UG096.1
February 24, 2017
Page 4
User Guide 096
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
C30
C31
C10
C9
C8
C7
C6
C5
C4
C3
C2
C1
C0
ISL72813SEH
A0
A1
A2
A3
A4
EN
GND
VEE
GND
VCC
GND
GNDGND
SW0
A0
SW1
A1
SW2
A2
SW3
A3
SW4
A4
SW5
EN
ISL72813SEHEV1Z REV A
+5V
DC POWER SUPPLY
-
+
+34V
DC POWER SUPPLY
-
+
56Ω TO 4kΩ
H
L
H
L
H
L
H
L
H
L
H
L
+
-
A
IC0
+-V
VCE (SAT)
RESISTOR
DECADE
BOX
FIGURE 2. BASIC EVALUATION TEST SETUP BLOCK DIAGRAM (MEASURING VCE (SAT) vs ICx)
Using the Board to Measure
VCE (SAT) vs IVEE of Channel C0
Refer to Figure 2.
Lab Equipment
The equipment, external supplies, and signal sources needed to
operate the board:
1. DC power supply (3V to 5.5V).
2. DC power supply (-10V to -34V) capable of sinking 1A.
3. Resistor decade box or keysight B2902A precision
source/measurement unit or equivalent.
Initial Board Setup Procedure
1. Remove the J0 jumper to disconnect the LED circuitry from
the C0 channel.
2. Put the SW0 A0, SW1 A1, SW2 A2, SW3 A3, SW4 A4, and
SW5 EN toggle switches in the “L” down position. With the
SW5 EN in the “L” position all channels will be disabled (OFF).
3. Attach the 5VDC power supply to the banana jacks labeled
VCC and GND as shown in Figure 2
and negative terminal at GND. The supply should be capable
of delivering 3V to 5.5V and 100mA of current. Set the supply
voltage to 5V.
4. Attach the 34V
power supply to the banana jacks labeled
DC
VEE and GND as shown in Figure 2
and Positive terminal at GND. The supply should be capable of
-10V to -34V and sinking 1A of current. Set the supply voltage
to 34V.
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4
. Positive terminal at VCC
. Negative terminal at VEE
5. Connect the resistor decade box and ammeter (A) to the C0
pin on the evaluation board as shown in Figure 2
. One end of
the decade box resistor should be connected to the C0 pin
through the ammeter to measure the IC0 current. The other
end of the resistor to the ground pin on the evaluation board.
Set the decade box resistance to 165Ω.
6. Connect a voltmeter (V) between the C0 pin and VEE banana
jack as shown in Figure 2
. The voltmeter will measure the
VCE (SAT) voltage.
VCE (SAT) Measurements for Channel C0
1. Configure the board as described in “Initial Board Setup
Procedure”.
2. Put the SW5 EN toggle switch in the “H” up position to enable
the IC. The IC0 current should read approximately 200mA and
the VCE (SAT) voltage should read around 0.89V.
3. Change the decade box resistance to 94Ω. The ICO current
should read approximately 349mA and the VCE (SAT) voltage
should read around 1.01V.
4. Change the decade box resistance to 65Ω. The ICO current
should read approximately 499mA and the VCE (SAT) voltage
should read around 1.13V.
5. Change the decade box resistance to 61Ω. The ICO current
should read approximately 532mA and the VCE (SAT) voltage
should read around 1.16V.
February 24, 2017
UG096.1
Page 5
User Guide 096
Measuring VCE (SAT) on Other Channels
1. Configure the board as described in “Initial Board Setup
Procedure” on page 4.
2. Ensure that SW5 EN toggle switch is in the “L” down position
to disable the IC.
3. Move the ammeter and decade box to the new Cx channel
that the user wants to test. Move the voltmeter to measure
the voltage from the new Cx channel to VEE. Remove the Jx
jumper from that channel. Configure the SW0 A0 - SW4 A4
toggle switches to the appropriate logic levels to select the
new Cx channel. Refer to the truth table on page 5 of the
ISL72813SEH
For example, if the user wants to perform the measurement
on the C26 channel, connect the ammeter/decade box at the
C26 pin on the evaluation board. Connect the voltmeter
across the C26 pin and VEE. Remove jumper J26 to
disconnect its LED circuitry. Set the toggle switches
SW0 A0 = “L”, SW1 A1 = “H”, SW2 A2 = “L”, SW3 A3 = “H”,
and SW4 A4 = “H”.
4. Repeat steps 2 - 5 in “
C0” on page 4 for the new Cx channel.
5. Note: The performance curves shown in Figure 13 on page 17
was taken using the evaluation board and a Keysight B2902A
precision source/measurement unit.
Test conditions:
a. The B2902A unit was set to measure and graph VCE
b. VCC = 5V, VEE = -34V, EN = VCC, A0 - A4 = Set to have
c. Channels CH0, CH8, CH16, CH24, and CH31 were
datasheet.
VCE (SAT) Measurements for Channel
(SAT) vs ICX as the user sweeps the ICX in 10mA
increments from 0mA to 600mA.
the Cx channel ON.
measured. The plots in Figure 13 are the average of
these channels.
FIGURE 13. VCE (SAT) vs ICX vs TEMPERATUREFIGURE 14. t
= 3.3V, D = 125kHz, Square Wave, 0 to VCC, 50% Duty Cycle,
CC
ENABLE/tDISABLE
vs VCC vs TEMPERATURE
Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is
cautioned to verify that the document is current before proceeding.
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For information regarding Intersil Corporation and its products, see www.intersil.com
17
FIGURE 15. IEE vs VEE vs TEMPERATURE
UG096.1
February 24, 2017
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