User Guide 096
UG096.1
February 24, 2017
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4
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 5V
DC
power supply to the banana jacks labeled
VCC and GND as shown in
Figure 2
. Positive terminal at VCC
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
DC
power supply to the banana jacks labeled
VEE and GND as shown in
Figure 2
. Negative terminal at VEE
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.
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 165
Ω
.
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 94
Ω
. The ICO current
should read approximately 349mA and the VCE (SAT) voltage
should read around 1.01V.
4. Change the decade box resistance to 65
Ω
. The ICO current
should read approximately 499mA and the VCE (SAT) voltage
should read around 1.13V.
5. Change the decade box resistance to 61
Ω
. The ICO current
should read approximately 532mA and the VCE (SAT) voltage
should read around 1.16V.
FIGURE 2. BASIC EVALUATION TEST SETUP BLOCK DIAGRAM (MEASURING VCE (SAT) vs ICx)
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C2
1
C2
2
C2
3
C2
4
C2
5
C2
6
C2
7
C2
8
C2
9
C3
0
C3
1
C1
0
C9
C8
C7
C6
C5
C4
C3
C2
C1
C0
ISL72813SEH
A0
A1
A2
A3
A4
EN
GND
VEE
GND
VCC
GND
GND
GND
SW0
A0
SW1
A1
SW2
A2
SW3
A3
SW4
A4
SW5
EN
ISL72813SEHEV1Z REV A
+5V
DC POWER SUPPLY
-
+
+34V
DC POWER SUPPLY
-
+
56
Ω
T
O
4kΩ
H
L
H
L
H
L
H
L
H
L
H
L
+
-
A
IC0
+
- V
VCE (SAT)
RESISTOR
DECADE
BOX
