Data Sheet
HCPL-3140, HCPL-0314
0.4-Amp Output Current IGBT Gate Drive
Optocoupler
Description
Features
The HCPL-3140/HCPL-0314 family of devices consists of a
GaAsP LED optically coupled to an integrated circuit with a
power output stage. These optocouplers are ideally suited
for driving power IGBTs and MOSFETs used in motor
control inverter applications. The high operating voltage
range of the output stage provides the drive voltages
required by gate controlled devices. The voltage and current
supplied by this optocoupler make it ideally suited for
directly driving small or medium power IGBTs. For IGBTs
with higher ratings, the HCPL-3150 (0.5A) or HCPL-3120
(2.0A) optocouplers can be used.
Figure 1: Functional Diagram
0.4A minimum peak output current
High-speed response:
0.7-μs maximum propagation delay over temperature
range
Ultra-high CMR: minimum 25 kV/μs at VCM = 1 kV
Bootstrappable supply current: maximum 3 mA
Wide operating temperature range: –40°C to 100°C
Wide VCC operating range: 10V to 30V over
temperature range
Available in DIP-8 and SO-8 packages
Safety approvals: UL approval, 3750 Vrms for 1 minute.
CSA approval. IEC/EN/DIN EN 60747-5-2 approval
VIORM = 630 Vpeak (HCPL-3140)
Applications
N/C
1
8
VCC
ANODE
2
7
N.C.
CATHODE
3
6
VO
N/C
4
5
VEE
SHIELD
HCPL-3140/HCPL-0314
Table 1: Truth Table
LED
Isolated IGBT/Power MOSFET gate drive
AC and brushless DC motor drives
Inverters for home appliances
Industrial inverters
Switch Mode Power Supplies (SMPS)
CAUTION! It is advised that normal static precautions be
taken in handling and assembly of this
component to prevent damage and/or
degradation that may be induced by ESD.
VO
OFF
LOW
ON
HIGH
A 0.1-µF bypass capacitor must be connected between pins VCC and VEE.
Broadcom
AV02-0162EN
May 28, 2021
HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Ordering Information
HCPL-3140 and HCPL-0314 are UL recognized with 3750 Vrms for 1 minute per UL1577.
Option
Part Number
HCPL-3140
HCPL-0314
RoHS
Compliant
Non RoHS
Compliant
-000E
No option
-300E
#300
-500E
#500
-060E
#060
-360E
#360
X
X
-560E
#560
X
X
Package
Surface
Mount
Gull
Wing
X
X
X
X
Tape &
Reel
IEC/EN/DIN
EN 60747-5-2
Quantity
50 per tube
300 mil
DIP-8
X
1000 per reel
X
-000E
No option
X
-500E
#500
X
-060E
#060
-560E
#560
SO-8
50 per tube
X
X
50 per tube
X
1000 per reel
100 per tube
X
X
X
50 per tube
X
1500 per reel
X
100 per tube
X
1500 per reel
To order, choose a part number from the Part Number column and combine with the desired option from the Option column
to form an order entry.
Example 1:
HCPL-3140-560E to order product of 300 mil DIP Gull Wing Surface Mount package in Tape and Reel packaging with
IEC/EN/DIN EN 60747-5-2 Safety Approval in RoHS compliant.
Example 2:
HCPL-3140 to order product of 300 mil DIP package in tube packaging and non RoHS compliant.
Option data sheets are available. Contact your Broadcom® sales representative or authorized distributor for information.
Remarks: The notation '#XXX' is used for existing products, while (new) products launched since 15th July 2001 and RoHS
compliant option will use '-XXXE'.
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Package Outline Drawings
Figure 2: HCPL-3140 Standard DIP Package
7.62 ± 0.25
(0.300 ± 0.010)
9.65 ± 0.25
(0.380 ± 0.010)
8
TYPE NUMBER
7
6
5
6.35 ± 0.25
(0.250 ± 0.010)
OPTION CODE*
DATE CODE
A XXXXZ
YYWW RU
1
2
3
UL
RECOGNITION
4
1.78 (0.070) MAX.
1.19 (0.047) MAX.
+ 0.076
0.254 - 0.051
+ 0.003)
(0.010 - 0.002)
5° TYP.
3.56 ± 0.13
(0.140 ± 0.005)
4.70 (0.185) MAX.
0.51 (0.020) MIN.
2.92 (0.115) MIN.
DIMENSIONS IN MILLIMETERS AND (INCHES).
* MARKING CODE LETTER FOR OPTION NUMBERS
"V" = OPTION 060
OPTION NUMBERS 300 AND 500 NOT MARKED.
0.65 (0.025) MAX.
1.080 ± 0.320
(0.043 ± 0.013)
2.54 ± 0.25
(0.100 ± 0.010)
NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
Figure 3: HCPL-3140 Gull Wing Surface Mount Option 300 Outline Drawing
LAND PATTERN RECOMMENDATION
9.65 ± 0.25
(0.380 ± 0.010)
8
7
6
1.016 (0.040)
5
6.350 ± 0.25
(0.250 ± 0.010)
1
2
3
10.9 (0.430)
4
1.27 (0.050)
1.19
(0.047)
MAX.
1.780
(0.070)
MAX.
9.65 ± 0.25
(0.380 ± 0.010)
7.62 ± 0.25
(0.300 ± 0.010)
3.56 ± 0.13
(0.140 ± 0.005)
1.080 ± 0.320
(0.043 ± 0.013)
2.0 (0.080)
0.635 ± 0.25
(0.025 ± 0.010)
0.635 ± 0.130
2.54
(0.025 ± 0.005)
(0.100)
BSC
DIMENSIONS IN MILLIMETERS (INCHES).
LEAD COPLANARITY = 0.10 mm (0.004 INCHES).
+ 0.076
0.254 - 0.051
+ 0.003)
(0.010 - 0.002)
12° NOM.
NOTE: FLOATING LEAD PROTRUSION IS 0.25 mm (10 mils) MAX.
Broadcom
AV02-0162EN
3
HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 4: HCPL-0314 Small Outline SO-8 Package
LAND PATTERN RECOMMENDATION
8
7
6
5
XXX
YWW
3.937 ± 0.127
(0.155 ± 0.005)
5.994 ± 0.203
(0.236 ± 0.008)
7.49 (0.295)
TYPE NUMBER
(LAST 3 DIGITS)
DATE CODE
PIN ONE 1
2
3
4
0.406 ± 0.076
(0.016 ± 0.003)
1.9 (0.075)
1.270 BSC
(0.050)
0.64 (0.025)
* 5.080 ± 0.127
(0.200 ± 0.005)
7°
3.175 ± 0.127
(0.125 ± 0.005)
45° X
0.432
(0.017)
0 ~ 7°
1.524
(0.060)
0.228 ± 0.025
(0.009 ± 0.001)
0.203 ± 0.102
(0.008 ± 0.004)
* TOTAL PACKAGE LENGTH (INCLUSIVE OF MOLD FLASH)
5.207 ± 0.254 (0.205 ± 0.010)
0.305 MIN.
(0.012)
DIMENSIONS IN MILLIMETERS (INCHES).
LEAD COPLANARITY = 0.10 mm (0.004 INCHES) MAX.
NOTE: FLOATING LEAD PROTRUSION IS 0.15 mm (6 mils) MAX.
Figure 5: Solder Reflow Temperature Profile
300
TEMPERATURE (°C)
PREHEATING RATE 3°C + 1°C/–0.5°C/SEC.
REFLOW HEATING RATE 2.5°C ± 0.5°C/SEC.
200
PEAK
TEMP.
245°C
PEAK
TEMP.
240°C
2.5°C ± 0.5°C/SEC.
30
SEC.
160°C
150°C
140°C
PEAK
TEMP.
230°C
SOLDERING
TIME
200°C
30
SEC.
3°C + 1°C/–0.5°C
100
PREHEATING TIME
150°C, 90 + 30 SEC.
50 SEC.
TIGHT
TYPICAL
LOOSE
ROOM
TEMPERATURE
0
0
50
100
150
200
250
TIME (SECONDS)
NOTE:
Broadcom
Non-halide flux should be used.
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 6: Recommended Pb-Free IR Profile
tp
Tp
TEMPERATURE
TL
Tsmax
260 +0/-5 °C
TIME WITHIN 5 °C of ACTUAL
PEAK TEMPERATURE
20-40 SEC.
217 °C
RAMP-UP
3 °C/SEC. MAX.
150 - 200 °C
RAMP-DOWN
6 °C/SEC. MAX.
Tsmin
ts
PREHEAT
60 to 180 SEC.
25
tL
60 to 150 SEC.
t 25 °C to PEAK
TIME
NOTES:
THE TIME FROM 25 °C to PEAK TEMPERATURE = 8 MINUTES MAX.
Tsmax = 200 °C, Tsmin = 150 °C
NOTE:
Non-halide flux should be used.
Regulatory Information
The HCPL-3140/HCPL-0314 have been approved by the following organizations:
IEC/EN/DIN EN 60747-5-2
Approved under:
IEC 60747-5-2:1997 + A1:2002
EN 60747-5-2:2001 + A1:2002
DIN EN 60747-5-2 (VDE 0884 Teil 2):2003-01
(Option 060 only)
UL
Approval under UL 1577, component recognition program up to VISO = 3750 Vrms. File E55361.
CSA
Approval under CSA Component Acceptance Notice #5, File CA 88324.
Broadcom
AV02-0162EN
5
HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
IEC/EN/DIN EN 60747-5-2 Insulation Characteristics (HCPL-3140 Option 060)
Description
Symbol
Installation classification per DIN VDE 0110/1.89, Table 1
For rated mains voltage ≤ 150 Vrms
For rated mains voltage ≤ 300 Vrms
For rated mains voltage ≤ 600 Vrms
—
Climatic Classification
—
Pollution Degree (DIN VDE 0110/1.89)
Characteristic
I - IV
I - III
I - II
55/100/21
Unit
—
—
—
2
—
VIORM
630
Vpeak
Input to Output Test Voltage, Method ba
VIORM x 1.875 = VPR, 100% Production Test with
tm = 1 sec, Partial Discharge < 5 pC
VPR
1181
Vpeak
Input to Output Test Voltage, Method aa
VIORM x 1.5 = VPR, Type and Sample Test,
tm = 60 sec, Partial Discharge < 5 pC
VPR
945
Vpeak
VIOTM
6000
Vpeak
TS
IS,INPUT
PS,OUTPUT
175
230
600
°C
mA
mW
RS
>109
Ω
Maximum Working Insulation Voltage
Highest Allowable Overvoltage
(Transient Overvoltage tini = 10 sec)
Safety-limiting values - maximum values allowed in the event of a failure.
Case Temperature
Input Currentb
Output Powerb
Insulation Resistance at TS, VIO = 500V
a. Refer to the optocoupler section of the Isolation and Control Components Designer’s Catalog, under the Product Safety Regulations section
IEC/EN/DIN EN 60747-5-2, for a detailed description of the Method a and Method b partial discharge test profiles.
OUTPUT POWER – PS, INPUT CURRENT – IS
b. See the following figure for dependence of PS and IS on ambient temperature.
800
PS (mW)
IS (mA)
700
600
500
400
300
200
100
0
0
25
50
75 100 125 150 175 200
TS – CASE TEMPERATURE – °C
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Insulation and Safety Related Specifications
Parameter
Minimum External Air Gap
(Clearance)
Minimum External Tracking
(Creepage)
Minimum Internal Plastic Gap
(Internal Clearance)
Tracking Resistance
(Comparative Tracking Index)
Isolation Group
Symbol
HCPL-3140
HCPL-0314
Units
L(101)
7.1
4.9
mm
Measured from input terminals to output
terminals, shortest distance through air.
L(102)
7.4
4.8
mm
Measured from input terminals to output
terminals, shortest distance path along
body.
Through insulation distance conductor to
conductor, usually the straight line
distance thickness between the emitter
and the detector.
—
0.08
0.08
mm
CTI
>175
>175
V
—
IIIa
IIIa
—
Conditions
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89,
Table 1)
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Units
Storage Temperature
TS
–55
125
°C
Operating Temperature
TA
–40
100
°C
Average Input Current
IF(AVG)
—
25
mA
Peak Transient Input Current
( 5V
Threshold Input Voltage
High to Low
VFHL
0.8
—
—
V
—
VF
1.2
1.5
1.8
V
IF = 10 mA
ΔVF/ΔTA
—
–1.6
—
mV/°C
—
Input Reverse Breakdown
Voltage
BVR
5
—
—
V
IR = 10 µA
Input Capacitance
CIN
—
60
—
pF
f = 1 MHz,
VF = 0V
Input Forward Voltage
Temperature Coefficient
of Input Forward Voltage
A
A
e
15, 21
22
a. Maximum pulse width = 50 µs, maximum duty cycle = 0.5%.
b. Maximum pulse width = 10 µs, maximum duty cycle = 0.2%. This value is intended to allow for component tolerances for designs with IO peak
minimum = 0.4A. See the Applications Information section for additional details on limiting IOL peak.
c. In this test, VOH is measured with a DC load current. When driving capacitive load, VOH will approach VCC as IOH approaches zero amps.
d. Maximum pulse width = 1 ms, maximum duty cycle = 20%.
e. The power supply current increases when the operating frequency and Qg of the driven IGBT increase.
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Switching Specifications (AC)
Over recommended operating conditions unless otherwise specified.
Parameter
Symbol
Min.
Typ.
Max.
Units
Propagation Delay Time
to High Output Level
tPLH
0.1
0.2
0.7
µs
Propagation Delay Time
to Low Output Level
tPHL
0.1
0.3
0.7
µs
Propagation Delay
Difference Between Any
Two Parts or Channels
PDD
–0.5
—
0.5
µs
Rise Time
tR
—
50
—
ns
Fall Time
tF
—
50
—
ns
Output High Level Common
Mode Transient Immunity
|CMH|
25
35
Output Low Level Common
Mode Transient Immunity
|CML|
25
35
—
—
kV/µs
Test Conditions
Figure
Note
Rg = 47Ω,
Cg = 3 nF,
f = 10 kHz,
Duty Cycle = 50%,
IF = 8 mA,
16, 17,
18, 19,
a
20, 23
b
VCC = 30V
TA = 25°C,
VCM = 1 kV
kV/µs
24
c
24
d
a. The power supply current increases when the operating frequency and Qg of the driven IGBT increase.
b. PDD is the difference between tPHL and tPLH between any two parts or channels under the same test conditions.
c. Common mode transient immunity in the high state is the maximum tolerable |dVCM/dt| of the common mode pulse VCM to assure that the
output will remain in the high state (i.e. VO > 6.0V).
d. Common mode transient immunity in a low state is the maximum tolerable |dVCM/dt| of the common mode pulse VCM to assure that the output
will remain in a low state (i.e. VO < 1.0V).
Package Characteristics
Parameter
Symbol
Min.
Typ.
Max.
Units
Test Conditions
Figure
Note
Input-Output Momentary
Withstand Voltage
VISO
3750
—
—
Vrms
TA = 25°C,
RH < 50%
for 1 min.
a, b
Input-Output Resistance
RI-O
—
1012
—
Ω
VI-O = 500V
b
Input-Output Capacitance
CI-O
—
0.6
—
pF
Freq = 1 MHz
a. In accordance with UL 1577, each optocoupler is proof-tested by applying an insulation test voltage ≥ 4500 Vrms for 1 second (leakage
detection current limit II-O ≤ 5μA). This test is performed before 100% production test for partial discharge (method B) shown in the
IEC/EN/DIN EN 60747-5-2 Insulation Characteristics (HCPL-3140 Option 060) table, if applicable.
b. Device considered a two-terminal device: Pins on input side shorted together, and pins on output side shorted together.
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 8: IOH vs. Temperature
0
0.40
IOH – OUTPUT HIGH CURRENT – A
(VOH-VCC) – HIGH OUTPUT VOLTAGE DROP – V
Figure 7: VOH vs. Temperature
-0.5
-1.0
-1.5
-2.0
-2.5
-50
-25
0
25
50
75
100
0.38
0.36
0.34
0.32
0.30
-50
125
-25
0
TA – TEMPERATURE – °C
25
50
75
100
125
TA – TEMPERATURE – °C
Figure 9: VOH vs. IOH
Figure 10: VOL vs. Temperature
VOL – OUTPUT LOW VOLTAGE – V
0.44
0.43
0.42
0.41
0.40
0.39
-50
-25
0
25
50
75
100
125
TA – TEMPERATURE – °C
Figure 11: IOL vs. Temperature
Figure 12: VOL vs. IOL
25
VOL – OUTPUT LOW VOLTAGE – V
IOL – OUTPUT LOW CURRENT – A
0.470
0.465
0.460
0.455
0.450
0.445
0.440
-50
15
10
5
0
-25
0
25
50
75
TA – TEMPERATURE – °C
Broadcom
20
100
125
0
100
200
300
400
500
600
700
IOL – OUTPUT LOW CURRENT – mA
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 14: ICC vs. VCC
1.4
1.2
1.2
1.0
ICC – SUPPLY CURRENT – mA
ICC – SUPPLY CURRENT – mA
Figure 13: ICC vs. Temperature
1.0
0.8
0.6
0.4
ICCL
ICCH
0.2
0
-50
-25
0
25
50
75
100
0.8
0.6
0.4
ICCL
0.2
ICCH
0
10
125
15
TA – TEMPERATURE – °C
25
30
Figure 16: Propagation Delay vs. VCC
3.5
400
TP – PROPAGATION DELAY – ns
IFLH – LOW TO HIGH CURRENT THRESHOLD – mA
Figure 15: IFLH vs. Temperature
3.0
2.5
2.0
1.5
-50
300
200
100
TPLH
TPHL
-25
0
25
50
75
100
0
10
125
15
TA – TEMPERATURE – °C
20
25
30
VCC – SUPPLY VOLTAGE – V
Figure 17: Propagation Delay vs. IF
Figure 18: Propagation Delay vs. Temperature
500
TP – PROPAGATION DELAY – ns
400
TP – PROPAGATION DELAY – ns
20
VCC – SUPPLY VOLTAGE – V
300
200
100
400
300
200
100
TPLH
TPHL
0
6
9
12
15
IF – FORWARD LED CURRENT – mA
Broadcom
18
0
-50
-25
0
25
50
75
100
125
TA – TEMPERATURE – °C
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 19: Propagation Delay vs. Rg
Figure 20: Propagation Delay vs. Cg
400
TP – PROPAGATION DELAY – ns
TP – PROPAGATION DELAY – ns
400
350
TPLH
300
TPHL
250
300
200
100
TPLH
TPHL
200
50
0
100
150
0
200
0
Rg – SERIES LOAD RESISTANCE – Ω
Figure 21: Transfer Characteristics
40
60
80
100
Figure 22: Input Current vs. Forward Voltage
25
35
IF – FORWARD CURRENT – mA
30
VO – OUTPUT VOLTAGE – V
20
Cg – LOAD CAPACITANCE – nF
25
20
15
10
5
20
15
10
5
0
-5
0
1
2
3
4
5
IF – FORWARD LED CURRENT – mA
Broadcom
6
0
1.2
1.4
1.6
1.8
VF – FORWARD VOLTAGE – V
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 23: Propagation Delay Test Circuit and Waveforms
1
8
0.1 μF
IF = 7 to 16 mA
2
+
10 KHz –
+
–
7
500Ω
IF
VCC = 15
to 30V
tr
tf
VO
50% DUTY
CYCLE
3
6
90%
47Ω
50%
VOUT
3 nF
4
10%
5
tPLH
tPHL
Figure 24: CMR Test Circuit and Waveforms
V CM
1
5V
δt
0.1 μF
A
B
δV
8
IF
2
VO
3
6
4
5
V CM
Δt
0V
7
+
–
=
Δt
+
–
V CC = 30V
VO
V OH
SWITCH AT A: I F = 10 mA
VO
V OL
+
–
SWITCH AT B: I F = 0 mA
V CM = 1500V
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Applications Information
Eliminating Negative IGBT Gate Drive
To keep the IGBT firmly off, the HCPL-3140/HCPL-0314 has a very low maximum VOL specification of 1.0V. Minimizing Rg
and the lead inductance from the HCPL-3140/HCPL-0314 to the IGBT gate and emitter (possibly by mounting the
HCPL-3140/HCPL-0314 on a small PC board directly above the IGBT) can eliminate the need for negative IGBT gate drive
in many applications as shown in Figure 25. Care should be taken with such a PC board design to avoid routing the IGBT
collector or emitter traces close to the HCPL-3140/HCPL-0314 input as this can result in unwanted coupling of transient
signals into the input of HCPL-3140/HCPL-0314 and degrade performance. (If the IGBT drain must be routed near the
HCPL-3140/HCPL-0314 input, then the LED should be reverse-biased when in the off state to prevent the transient signals
coupled from the IGBT drain from turning on the HCPL-3140/HCPL-0314.)
Figure 25: Recommended LED Drive and Application Circuit for HCPL-3140/HCPL-0314
HCPL-3140/HCPL-0314
+5V
1
270Ω
CONTROL
INPUT
74XXX
OPEN
COLLECTOR
Broadcom
8
0.1 μF
2
7
3
6
4
5
+
–
VCC = 15V
+ HVDC
Rg
Q1
3-PHASE
AC
Q2
- HVDC
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
Step 1: Calculate Rg minimum from the IOL peak
specification. The IGBT and Rg in Figure 25 can be
analyzed as a simple RC circuit with a voltage supplied by
the HCPL-3140/HCPL-0314.
y
Rg ≥ VCC – VOL
IOLPEAK
=
24V – 5V
0.6A
= 32Ω
The VOL value of 5V in the previous equation is the VOL at
the peak current of 0.6A. (See Figure 12.)
Step 2: Check the HCPL-3140/HCPL-0314 power
dissipation and increase Rg if necessary. The HCPL-3140/
HCPL-0314 total power dissipation (PT) is equal to the sum
of the emitter power (PE) and the output power (PO).
PT = PE + PO
PE = IF VF Duty Cycle
PO = PO(BIAS) + PO(SWITCHING) = ICC VCC + ESW
(Rg,Qg) f = (ICCBIAS + KICC Qg f) VCC + ESW
(Rg,Qg) f
Where KICC Qg f is the increase in ICC due to switching
and KICC is a constant of 0.001 mA/(nC*kHz). For the circuit
in Figure 25 with IF (worst case) = 10 mA, Rg = 32Ω,
Max Duty Cycle = 80%, Qg = 100 nC, f = 20 kHz, and
TAMAX = 85°C:
PE = 10 mA 1.8V 0.8 = 14 mW
PO = (3 mA + (0.001 mA/(nC kHz)) 20 kHz 100 nC)
24V + 0.4 µJ 20 kHz = 128 mW
< 250 mW (PO(MAX) @ 85°C)
The value of 3 mA for ICC in the previous equation is the
max. ICC over the entire operating temperature range.
Since PO for this case is less than PO(MAX), Rg = 32Ω is
alright for the power dissipation.
Broadcom
Figure 26: Energy Dissipated in the HCPL-0314 and for Each
IGBT Switching Cycle
Esw – ENERGY PER SWITCHING CYCLE – μJ
Selecting the Gate Resistor (Rg)
0.4-Amp Output Current IGBT Gate Drive Optocoupler
4.0
Qg = 50 nC
Qg = 100 nC
Qg = 200 nC
Qg = 400 nC
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
20
40
60
80
100
Rg – GATE RESISTANCE – Ω
LED Drive Circuit Considerations for UltraHigh CMR Performance
Without a detector shield, the dominant cause of
optocoupler CMR failure is capacitive coupling from the
input side of the optocoupler, through the package, to the
detector IC as shown in Figure 27. The HCPL-3140/
HCPL-0314 improves CMR performance by using a
detector IC with an optically transparent Faraday shield,
which diverts the capacitively coupled current away from the
sensitive IC circuitry. However, this shield does not eliminate
the capacitive coupling between the LED and optocoupler
pins 5-8 as shown in Figure 28. This capacitive coupling
causes perturbations in the LED current during common
mode transients and becomes the major source of CMR
failures for a shielded optocoupler. The main design
objective of a high CMR LED drive circuit becomes keeping
the LED in the proper state (on or off) during common mode
transients. For example, the recommended application
circuit (Figure 25) can achieve 25-kV/µs CMR while
minimizing component complexity.
Techniques to keep the LED in the proper state are
discussed in the next two sections.
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 27: Optocoupler Input to Output Capacitance Model
for Unshielded Optocouplers
1
Figure 28: Optocoupler Input to Output Capacitance Model
for Shielded Optocouplers
8
1
7
2
CLEDO1
CLEDP
2
8
CLEDP
7
CLEDO2
3
CLEDN
4
6
3
5
4
Figure 29: Equivalent Circuit for Figure 23 During Common
Mode Transient
6
CLEDN
5
SHIELD
Figure 30: Not Recommended Open Collector Drive Circuit
1
+5V
1
8
0.1
μF
CLEDP
2
+
VSAT
–
7
8
+5V
+
–
CLEDP
2
VCC = 18V
7
ILEDP
3
•••
6
CLEDN
Rg
3
Q1
CLEDN
6
ILEDN
4
SHIELD
5
•••
4
SHIELD
5
* THE ARROWS INDICATE THE DIRECTION
OF CURRENT FLOW DURING –dVCM/dt.
+ –
VCM
Figure 31: Recommended LED Drive Circuit for Ultra-High
CMR IPM Dead Time and Propagation Delay Specifications
1
8
+5V
CLEDP
2
3
4
Broadcom
7
CLEDN
SHIELD
6
5
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
CMR with the LED On (CMRH)
A high CMR LED drive circuit must keep the LED on during
common mode transients. This is achieved by over-driving
the LED current beyond the input threshold so that it is not
pulled below the threshold during a transient. A minimum
LED current of 8 mA provides adequate margin over the
maximum IFLH of 5 mA to achieve 25-kV/µs CMR.
CMR with the LED Off (CMRL)
A high CMR LED drive circuit must keep the LED off
(VF ≤ VF(OFF)) during common mode transients. For
example, during a –dVCM/dt transient in Figure 29, the
current flowing through CLEDP also flows through the RSAT
and VSAT of the logic gate. As long as the low state voltage
developed across the logic gate is less than VF(OFF), the
LED will remain off and no common mode failure will occur.
The open collector drive circuit, shown in Figure 30, cannot
keep the LED off during a +dVCM/dt transient, since all the
current flowing through CLEDN must be supplied by the LED,
and it is not recommended for applications requiring ultrahigh CMR1 performance. The alternative drive circuit, which
like the recommended application circuit (Figure 25), does
achieve ultra-high CMR performance by shunting the LED
in the off state.
0.4-Amp Output Current IGBT Gate Drive Optocoupler
IPM Dead Time and Propagation Delay
Specifications
The HCPL-3140/HCPL-0314 includes a Propagation Delay
Difference (PDD) specification intended to help designers
minimize “dead time” in their power inverter designs. Dead
time is the time that high-side and low-side power
transistors are off. Any overlap in Q1 and Q2 conduction will
result in large currents flowing through the power devices
from the high-voltage to the low-voltage motor rails. To
minimize dead time in a given design, the turn on of LED2
should be delayed (relative to the turn off of LED1) so that
under worst-case conditions, transistor Q1 has just turned
off when transistor Q2 turns on, as shown in Figure 32. The
amount of delay necessary to achieve this condition is equal
to the maximum value of the propagation delay difference
specification, PDD max, which is specified to be 500 ns over
the operating temperature range of –40°C to 100°C.
Delaying the LED signal by the maximum propagation delay
difference ensures that the minimum dead time is zero, but
it does not tell a designer what the maximum dead time will
be. The maximum dead time is equivalent to the difference
between the maximum and minimum propagation delay
difference specification as shown in Figure 33. The
maximum dead time for the HCPL-3140/HCPL-0314 is 1 µs
(= 0.5 µs – (–0.5 µs)) over the operating temperature range
of –40°C to 100°C.
Note that the propagation delays used to calculate PDD and
dead time are taken at equal temperatures and test
conditions since the optocouplers under consideration are
typically mounted in close proximity to each other and are
switching identical IGBTs.
Broadcom
AV02-0162EN
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HCPL-3140, HCPL-0314 Data Sheet
0.4-Amp Output Current IGBT Gate Drive Optocoupler
Figure 32: Minimum LED Skew for Zero Dead Time
ILED1
VOUT1
Q1 ON
Q1 OFF
Q2 ON
VOUT2
ILED2
Q2 OFF
tPHL MAX
tPLH MIN
PDD* MAX = (tPHL– tPLH)MAX = tPHL MAX – tPLH MIN
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR PDD CALCULATIONS, THE PROPAGATION DELAYS
ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
Figure 33: Waveforms for Dead Time
ILED1
VOUT1
Q1 ON
Q1 OFF
Q2 ON
VOUT2
Q2 OFF
ILED2
tPHL MIN
tPHL MAX
tPLH
MIN
tPLH MAX
(tPHL – tPLH) MAX
PDD* MAX
MAXIMUM DEAD TIME
(DUE TO OPTOCOUPLER)
= (tPHL MAX – tPHL MIN) + (tPLH MAX – tPLH MIN)
= (tPHL MAX – tPLH MIN) – (tPHL MIN – tPLH MAX)
= PDD* MAX – PDD* MIN
*PDD = PROPAGATION DELAY DIFFERENCE
NOTE: FOR DEAD TIME AND PDD CALCULATIONS, ALL PROPAGATION
DELAYS ARE TAKEN AT THE SAME TEMPERATURE AND TEST CONDITIONS.
Broadcom
AV02-0162EN
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