AVAGO ACPL-W346 Rail-to-rail output voltage Datasheet

ACPL-P346 and ACPL-W346
2.5 Amp Output Current Power & SiC MOSFET Gate Drive Optocoupler
with Rail-to-Rail Output Voltage in Stretched SO6
Data Sheet
Description
Features
The ACPL-P346/W346 contains an AlGaAs LED, which is
optically coupled to an integrated circuit with a power
output stage. This optocoupler is ideally suited for driving
power and SiC(Silicon Carbide) MOSFETs used in inverter
or AC-DC/DC-DC converter applications. The high operating voltage range of the output stage provides the drive
voltages required by gate controlled devices. The voltage
and high peak output current supplied by this optocoupler make it ideally suited for direct driving MOSFETs at
high frequency for high efficiency conversion. The ACPLP346 and ACPL-W346 have the highest insulation voltage
of VIORM= 891Vpeak and VIORM= 1140Vpeak respectively in
the IEC/ EN/DIN EN 60747-5-5.
• 2.5 A maximum peak output current
Functional Diagram
• Wide operating VCC Range: 10 to 20 V
• 2.0 A minimum peak output current
• Rail-to-rail output voltage
• 120 ns maximum propagation delay
• 50 ns maximum propagation delay difference
• LED current input with hysteresis
• 50 kV/µs minimum Common Mode Rejection (CMR) at
VCM = 1500 V
• ICC = 4.0 mA maximum supply current
• Under Voltage Lock-Out protection (UVLO) with
hysteresis
• Industrial temperature range: -40 °C to 105 °C
ANODE
1
6
V CC
NC
2
5
V OUT
CATHODE
3
4
V EE
• Safety Approval
- UL Recognized 3750/5000 VRMS for 1min.
- CSA
- IEC/EN/DIN EN 60747-5-5 VIORM = 891/1140 Vpeak
Applications
Note: A 1 µF bypass capacitor must be connected between pins VCC and
VEE.
• Power and SiC MOSFET gate drive
Truth Table
• Switching power supplies
LED
VCC – VEE
“POSITIVE GOING”
(i.e., TURN-ON)
VCC – VEE
“NEGATIVE GOING”
(i.e., TURN-OFF)
VO
OFF
0 - 20 V
0 – 20 V
LOW
ON
0 – 8.1 V
0 – 7.1 V
LOW
ON
8.1 – 9.1 V
7.1 – 8.1 V
TRANSITION
ON
9.1 – 20V
8.1 – 20 V
HIGH
• AC and Brushless DC motor drives
CAUTION: It is advised that normal static precautions be taken in handling and assembly
of this component to prevent damage and/or degradation which may be induced by ESD.
Ordering Information
ACPL-P346 is UL Recognized with 3750 VRMS for 1 minute per UL1577.
ACPL-W346 is UL Recognized with 5000 VRMS for 1 minute per UL1577.
Option
Part number
RoHS Compliant
Package
Surface Mount
ACPL-P346
ACPL-W346
-000E
Stretched
SO-6
X
-500E
X
-060E
X
-560E
X
Tape& Reel
IEC/EN/DIN EN
60747-5-5
Quantity
100 per tube
X
X
1000 per reel
X
100 per tube
X
1000 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:
ACPL-P346-560E to order product of Stretched SO-6 Surface Mount package in Tape and Reel packaging with IEC/EN/
DIN EN 60747-5-5 Safety Approval in RoHS compliant.
Example 2:
ACPL-W346-000E to order product of Stretched SO-6 Surface Mount package in Tube packaging and RoHS compliant.
Option datasheets are available. Contact your Avago sales representative or authorized distributor for information.
2
Package Outline Drawings
ACPL-P346 Stretched SO-6 Package (7 mm clearance)
4.580 +– 0.254
0
1.27 (0.050) BSG
0.381 ±0.127
(0.015 ±0.005)
(0.180 +– 0.010
0.000 )
Land Pattern Recommendation
0.76 (0.03)
1.27 (0.05)
10.7
(0.421)
2.16
(0.085)
7.62 (0.300)
1.590 ±0.127
(0.063 ±0.005)
6.81 (0.268)
0.45 (0.018)
45°
3.180 ±0.127
(0.125 ±0.005)
7°
7°
7°
0.20 ±0.10
(0.008 ±0.004)
7°
1 ±0.250
(0.040 ±0.010)
5° NOM.
0.254 ±0.050
(0.010 ±0.002)
Floating Lead Protusions max. 0.25 (0.01)
Dimensions in Millimeters (Inches)
9.7 ±0.250
(0.382 ±0.010)
Lead Coplanarity = 0.1 mm (0.004 Inches)
ACPL-W346 Stretched SO-6 Package (8 mm clearance)
4.580 +– 0.254
0
(0.180 +– 0.010
0.000 )
1.27 (0.050) BSG
0.381 ±0.127
(0.015 ±0.005)
Land Pattern Recommendation
0.76 (0.03)
1
6
2
5
3
4
1.27 (0.05)
7.62 (0.300)
6.807 +– 0.127
0
(0.268 +– 0.005
0.000 )
0.45 (0.018)
7°
45°
1.905
(0.075)
12.65
(0.5)
1.590 ±0.127
(0.063 ±0.005)
3.180 ±0.127
(0.125 ±0.005)
7°
0.20 ±0.10
(0.008 ±0.004)
0.750 ±0.250
(0.0295 ±0.010)
7°
35° NOM.
11.500 ±0.25
(0.453 ±0.010)
3
7°
0.254 ±0.050
(0.010 ±0.002)
Floating Lead Protusions max. 0.25 (0.01)
Dimensions in Millimeters (Inches)
Lead Coplanarity = 0.1 mm (0.004 Inches)
Recommended Pb-Free IR Profile
Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision). Non- Halide Flux should be used.
Regulatory Information
The ACPL-P346/W346 is approved by the following organizations:
UL
Recognized under UL 1577, component recognition program up to VISO = 3750 VRMS (ACPLP346) and VISO = 5000 VRMS (ACPL-W346).
CSA
CSA Component Acceptance Notice #5, File CA 88324
IEC/EN/DIN EN 60747-5-5
(Option 060 Only)
Maximum Working Insulation Voltage VIORM = 891Vpeak (ACPL-P346) and VIORM = 1140
Vpeak(ACPL-W346)
Table 1. IEC/EN/DIN EN 60747-5-5 Insulation Characteristics* (Option 060)
Description
Symbol
Installation classification per DIN VDE 0110/39, Table 1
for rated mains voltage ≤ 150 Vrms
for rated mains voltage ≤ 300 Vrms
for rated mains voltage ≤ 450 Vrms
for rated mains voltage ≤ 600 Vrms
for rated mains voltage ≤ 1000 Vrms
Climatic Classification
Pollution Degree (DIN VDE 0110/39)
ACPL-P346
Option 060
ACPL-W346
Option 060 Unit
I – IV
I – IV
I – III
I – III
I – IV
I – IV
I – IV
I – IV
I – III
40/105/21
40/105/21
2
2
Maximum Working Insulation Voltage
VIORM
891
1140
Vpeak
Input to Output Test Voltage, Method b*
VIORM x 1.875=VPR, 100% Production Test with tm=1 sec, Partial discharge < 5 pC
VPR
1671
2137
Vpeak
Input to Output Test Voltage, Method a*
VIORM x 1.6=VPR, Type and Sample Test, tm=10 sec, Partial discharge < 5 pC
VPR
1426
1824
Vpeak
Highest Allowable Overvoltage*
(Transient Overvoltage tini = 60 sec)
VIOTM
6000
8000
Vpeak
Case Temperature
TS
175
175
°C
Input Current
IS, INPUT
230
230
mA
Output Power
PS, OUTPUT
600
600
mW
RS
>109
>109
W
Safety-limiting values – maximum values allowed in the event of a failure
Insulation Resistance at TS, VIO = 500 V
* Refer to the optocoupler section of the Isolation and Control Components Designer’s Catalog, under Product Safety Regulations section, (IEC/EN/DIN
EN 60747-5-5) for a detailed description of Method a and Method b partial discharge test profiles.
Note: These optocouplers are suitable for “safe electrical isolation” only within the safety limit data. Maintenance of the safety data shall be ensured by
means of protective circuits. Surface mount classification is Class A in accordance with CECC 00802.
4
Table 2. Insulation and Safety Related Specifications
Parameter
Symbol
ACPL-P346
ACPL-W346
Units
Conditions
Minimum External
Air Gap (Clearance)
L(101)
7.0
8.0
mm
Measured from input terminals to output terminals,
shortest distance through air.
Minimum External
Tracking (Creepage)
L(102)
8.0
8.0
mm
Measured from input terminals to output terminals,
shortest distance path along body.
0.08
0.08
mm
Through insulation distance conductor to conductor,
usually the straight line distance thickness between
the emitter and detector.
> 175
> 175
V
DIN IEC 112/VDE 0303 Part 1
IIIa
IIIa
Minimum Internal
Plastic Gap
(Internal Clearance)
Tracking Resistance
(Comparative Tracking
Index)
CTI
Isolation Group
Material Group (DIN VDE 0110, 1/89, Table 1)
Notes:
1. All Avago data sheets report the creepage and clearance inherent to the optocoupler component itself. These dimensions are needed as a starting
point for the equipment designer when determining the circuit insulation requirements. However, once mounted on a printed circuit board,
minimum creepage and clearance requirements must be met as specified for individual equipment standards. For creepage, the shortest distance
path along the surface of a printed circuit board between the solder fillets of the input and output leads must be considered (the recommended
Land Pattern does not necessarily meet the minimum creepage of the device). There are recommended techniques such as grooves and ribs which
may be used on a printed circuit board to achieve desired creepage and clearances. Creepage and clearance distances will also change depending
on factors such as pollution degree and insulation level.
Table 3. Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Units
Storage Temperature
TS
-55
125
°C
Note
Operating Temperature
TA
-40
105
°C
Output IC Junction Temperature
TJ
125
°C
Average Input Current
IF(AVG)
25
mA
Peak Transient Input Current (<1 µs pulse width, 300pps)
IF(TRAN)
1
A
Reverse Input Voltage
VR
5
V
“High” Peak Output Current
IOH(PEAK)
2.5
A
2
“Low” Peak Output Current
IOL(PEAK)
2.5
A
2
Total Output Supply Voltage
(VCC - VEE)
0
25
V
Output Voltage
VO(PEAK)
-0.5
VCC
V
eOutput IC Power Dissipation
PO
500
mW
3
Total Power Dissipation
PT
550
mW
4
Note
1
Table 4. Recommended Operating Conditions
Parameter
Symbol
Min
Max.
Units
Operating Temperature
TA
- 40
105
°C
Output Supply Voltage
(VCC - VEE)
10
20
V
Input Current (ON)
IF(ON)
7
11
mA
Input Voltage (OFF)
VF(OFF)
- 3.6
0.8
V
5
Table 5. Electrical Specifications (DC)
All typical values are at TA = 25 °C, VCC - VEE = 10 V, VEE = Ground. All minimum and maximum specifications are at recommended operating conditions (TA = -40 to 105 °C, IF(ON) = 7 to 11 mA, VF(OFF) = -3.6 to 0.8 V, VEE = Ground , VCC = 10 to
20 V), unless otherwise noted.
Parameter
Symbol
Min.
Typ.
High Level Peak Output Current
IOH
-2.0
Low Level Peak Output Current
IOL
High Output Transistor RDS(ON)
Low Output Transistor RDS(ON)
Units
Test Conditions
Fig.
Note
-3.4
A
VCC – VO = 10 V
3, 4
5
2.0
4.4
A
VO - VEE = 10 V
6, 7
5
RDS,OH
0.3
1.7
3.5
Ω
IOH = -2.0 A
8
6
RDS,OL
0.3
0.7
2.0
Ω
IOL = 2.0 A
9
6
High Level Output Voltage
VOH
Vcc-0.3
Vcc – 0.2
V
IO = -100 mA,
IF = 9 mA
2, 4
7, 8
High Level Output Voltage
VOH
Vcc
V
IO = 0 mA,
IF = 9 mA
1
Low Level Output Voltage
VOL
0.1
0.25
V
IO = 100 mA
5, 7
High Level Supply Current
ICCH
2.6
4.0
mA
IF = 9 mA
Low Level Supply Current
ICCL
2.6
4.0
mA
VF = 0V
10,
11
Threshold Input Current
Low to High
IFLH
0.5
1.5
4.0
mA
VO > 5 V
12,
13
Threshold Input Voltage
High to Low
VFHL
0.8
Input Forward Voltage
VF
1.2
IF = 9 mA
19
Temperature Coefficient
of Input Forward Voltage
ΔVF/ΔTA
Input Reverse Breakdown
Voltage
BVR
Input Capacitance
CIN
UVLO Threshold
VUVLO+
8.1
8.6
9.1
VUVLO-
7.1
7.6
8.1
UVLOHYS
0.5
1.0
UVLO Hysteresis
6
Max.
V
1.55
1.95
-1.7
V
mV/°C
5
70
V
IR = 100 mA
pF
f = 1 MHz, VF = 0 V
V
VO > 5 V, IF = 9 mA
V
Table 6. Switching Specifications (AC)
All typical values are at TA = 25 °C, VCC - VEE = 10 V, VEE = Ground. All minimum and maximum specifications are at recommended operating conditions (TA = -40 to 105 °C, IF(ON) = 7 to 11 mA, VF(OFF) = -3.6 to 0.8 V, VEE = Ground), unless
otherwise noted.
Parameter
Symbol
Min.
Typ.
Max.
Units
Test Conditions
Fig.
Propagation Delay Time to
High Output Level
tPLH
30
55
120
ns
14, 15,
16, 17
Propagation Delay Time to Low tPHL
Output Level
30
55
120
ns
0
50
ns
Rg = 10 Ω,
Cg = 10 nF,
f = 200 kHz ,
Duty Cycle = 50%,
VCC = 10V
50
ns
40
ns
Pulse Width Distortion
PWD
Propagation Delay Difference
Between Any Two Parts
PDD
(tPHL - tPLH)
Propagation Delay Skew
tPSK
Rise Time
tR
8
30
ns
Fall Time
tF
8
30
ns
Output High Level Common
Mode Transient Immunity
|CMH|
50
70
Output Low Level Common
Mode Transient Immunity
|CML|
50
70
-50
Note
9
24, 25
10
11
Cg = 1 nF,
f = 200 kHz ,
Duty Cycle = 50%,
VCC = 10V
18, 20
kV/µs
TA = 25 °C, IF = 9 mA,
VCC = 20 V, VCM = 1500 V
with split resistors
21
kV/µs
TA = 25°C, VF = 0 V,
VCC = 20 V, VCM = 1500 V
with split resistors
12, 13
14, 15
Table 7. Package Characteristics
All typical values are at TA = 25 °C. All minimum/maximum specifications are at recommended operating conditions,
unless otherwise noted.
Parameter
Symbol
Device
Min.
Input-Output Momentary
Withstand Voltage*
VISO
ACPL-P346
ACPL-W346
Typ.
Max.
Units
Test Conditions
3750
VRMS
RH < 50%,
t = 1 min., TA = 25 °C
15,17
5000
VRMS
RH < 50%,
t = 1 min., TA = 25 °C
16,18
17
Input-Output Resistance
RI-O
>5012
Ω
VI-O = 500 VDC
Input-Output Capacitance
CI-O
0.6
pF
f =1 MHz
LED-to-Ambient
Thermal Resistance
R11
LED-to-Detector
Thermal Resistance
R12
27
Detector-to-LED
Thermal Resistance
R21
39
Detector-to-Ambient
Thermal Resistance
R22
47
*
7
135
°C/W
Fig.
Note
18
The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous
voltage rating. For the continuous voltage rating, refer to your equipment level safety specification or Avago Technologies Application Note 1074
entitled “Optocoupler Input-Output Endurance Voltage.”
Notes:
1. Derate linearly above 85 °C free-air temperature at a rate of 0.3 mA/ °C.
2. Maximum pulse width = 10 µs. This value is intended to allow for component tolerances for designs with IO peak minimum = 2.0 A. See applications
section for additional details on limiting IOH peak.
3. Derate linearly above 85 °C free-air temperature at a rate of 12.5 mW/ °C .
4. Derate linearly above 85 °C free-air temperature at a rate of 13.75 mW/ °C. The maximum LED junction temperature should not exceed 125 °C.
5. Maximum pulse width = 10 µs.
6. Output is sourced at -2.0 A/2.0 A with a maximum pulse width = 10 µs.
7. In this test VOH is measured with a dc load current. When driving capacitive loads, VOH will approach VCC as IOH approaches zero amps.
8. Maximum pulse width = 1 ms.
9. Pulse Width Distortion (PWD) is defined as |tPHL-tPLH| for any given device.
10. The difference between tPHL and tPLH between any two ACPL-P346 parts under the same test condition.
11. tPSK is equal to the worst case diff erence in tPHL and/or tPLH that will be seen between units at any given temperature and specified test conditions.
12. Pin 2 needs to be connected to LED common. Split resistor network in the ratio 1.5:1 with 232 Ω at the anode and 154 Ω at the cathode.
13. 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 > 10.0 V).
14. 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 < 1.0 V).
15. In accordance with UL1577, each optocoupler is proof tested by applying an insulation test voltage ≥4500 VRMS for 1 second (leakage detection
current limit, II-O ≤ 5 µA).
16. In accordance with UL1577, each optocoupler is proof tested by applying an insulation test voltage ≥6000 VRMS for 1 second (leakage detection
current limit, II-O ≤ 5 µA).
17. Device considered a two-terminal device: pins 1, 2, and 3 shorted together and pins 4, 5 and 6 shorted together.
18. The device was mounted on a high conductivity test board as per JEDEC 51-7.
8
IF = 9 mA
IOUT = 0 mA
V CC = 10 V
V EE = 0 V
10
9.995
9.99
9.985
9.98
-40
-20
0
20
40
60
TA - TEMPERATURE - °C
80
-1
-1.5
IOH - OUTPUT HIGH CURRENT - A
IOH - OUTPUT HIGH CURRENT - A
I F = 9 mA
V OUT = VCC – 10 V
V CC = 10 V
V EE = 0 V
-0.5
-2
-2.5
-3
-20
0
20
40
60
TA - TEMPERATURE - °C
80
-0.200
-0.250
-0.300
-0.350
-40
-20
0
20
40
60
TA - TEMPERATURE - °C
80
100
IF = 9 mA
V CC = 10 V
V EE = 0 V
T A = 25°C
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
100
Figure 3. IOH vs. temperature.
0
2
4
6
8
(VOH-VCC) - HIGH OUTPUT VOLTAGE DROP - V
10
Figure 4. IOH vs. VOH.
6
0.18
IOL - OUTPUT LOW CURRENT - A
0.16
VOL - OUTPUT LOW VOLTAGE - V
-0.150
0.0
-3.5
0.14
0.12
0.10
0.08
V F (OFF)= 0 V
IOUT = 100mA
V CC = 10 V
V EE = 0 V
0.06
0.04
0.02
-20
0
20
40
60
TA - TEMPERATURE - °C
Figure 5. VOL vs. Temperature.
9
-0.100
Figure 2. VOH vs. temperature.
0
0.00
-40
IF = 9 mA
IOUT = -100 mA
V CC = 10 V
V EE = 0 V
-0.050
100
Figure 1. High output rail voltage vs. temperature.
-4
-40
0.000
(VOH - VCC) - HIGH OUTPUT VOLTAGE DROP - V
VOH - HIGH OUTPUT RAIL VOLTAGE - V
10.005
80
100
5
4
3
V F (OFF)= 0 V
V OUT = 10 V
V CC = 10 V
V EE = 0 V
2
1
0
-40
-20
0
Figure 6. IOL vs. temperature.
20
40
60
TA - TEMPERATURE - °C
80
100
RDS,OH - HIGH OUTPUT TRANSISTOR - RDS(ON)Ω
IOL - OUTPUT LOW CURRENT - A
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
V F (OFF)= 0 V
V CC = 10 V
V EE = 0 V
T A = 25°C
0
2
4
6
VOL - OUTPUT LOW VOLTAGE - V
8
10
1.8
2.0
1.5
1.4
1.2
1.0
0.8
0.6
V F(OFF) = 0 V
IOUT = 2 A
V CC = 10 V
V EE = 0 V
0.4
0.2
0.5
0.0
-40
-20
0
20
40
60
TA - TEMPERATURE - °C
80
100
-20
0
20
40
TA - TEMPERATURE - °C
60
80
2.5
2.0
1.5
0.5
0.0
-40
100
10
VO - OUTPUT VOLTAGE - V
3
2.5
2
1.5
IIccL
CCL
IF = 9 mA for ICCH
V F = 0 V for ICCL
T A = 25°C
V EE = 0 V
0.5
10
Figure 11. ICC vs. VCC.
12
-20
0
IIccL
CCL
IIccH
CCH
20
40
60
TA - TEMPERATURE - °C
80
100
Figure 10. ICC vs. temperature.
12
1
IF = 9 mA for ICCH
V F = 0 V for ICCL
V CC = 10 V
V EE = 0 V
1.0
3.5
0
I F = 9 mA
I OUT = -2 A
V CC = 10 V
V EE = 0 V
1.0
3.0
1.6
Figure 9. RDS,OL vs. temperature.
ICC - SUPPLY CURRENT - mA
2.5
3.5
2.0
0.0
-40
10
3.0
Figure 8. RDS,OH vs. temperature.
ICC - SUPPLY CURRENT - mA
RDS,OL - LOW OUTPUT TRANSISTOR - RDS(ON)Ω
Figure 7. IOL vs. VOL.
3.5
IIccH
CCH
T A = 25°C
V CC = 10 V
V EE = 0 V
8
6
IFLHON
IfLH
4
IfHL
IFLHOFF
2
14
16
VCC - SUPPLY VOLTAGE - V
18
20
0
0
0.5
1
1.5
2
2.5
IFLH - LOW TO HIGH CURRENT THRESHOLD - mA
Figure 12. IFLH hysteresis.
3
2.0
TP - PROPAGATION DELAY - ns
IFLH - LOW TO HIGH CURRENT THRESHOLD - mA
70
2.5
1.5
1.0
V CC = 10 V
V EE = 0 V
0.5
0.0
IFLH ON
IfLH
-40
-20
0
IFLH OFF
ifHL
20
40
60
TA - TEMPERATURE - °C
80
IF = 9 mA
V CC = 10 V, V EE = 0 V
R g= 10 Ω, C g= 10nF
DUTY CYCLE = 50%
f = 200 kHz
TPLH
TpLH
45
TPHL
TpHL
7
7.5
8
8.5
9
9.5
10
IF - FORWARD LED CURRENT - mA
10.5
11
60
59
TP - PROPAGATION DELAY - ns
TP - PROPAGATION DELAY - ns
65
55
TPLH
TpLH
50
-20
0
20
40
TA - TEMPERATURE - °C
60
IF = 9 mA, T A = 25°C
V CC = 10 V, V EE = 0 V
C g= 10nF
DUTY CYCLE = 50%
f = 200 kHz
58
57
56
TPLH
TpLH
TpHL
TPHL
55
54
53
TPHL
TpHL
45
-40
80
52
100
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Rg - SERIES LOAD RESISTANCE - Ω
Figure 16. Propagation delay vs. Rg.
Figure 15. Propagation delay vs. temperature.
40
70
IF = 9 mA, T A = 25°C
V CC = 10 V, V EE = 0 V
R g= 10 Ω,
DUTY CYCLE = 50%
f = 200 kHz
65
60
35
TR/TF - RISE & FALL TIME - ns
TP - PROPAGATION DELAY - ns
50
60
70
TPLH
TPLH
TPHL
TPHL
55
50
IF = 9 mA, T A = 25°C
V CC = 10 V, V EE = 0 V
DUTY CYCLE = 50%
f = 200 kHz
30
25
20
15
TrTR
10
TfTF
5
0
5
10
15
Cg - SERIES LOAD CAPACITANCE - nF
Figure 17. Propagation delay vs. Cg.
11
55
Figure 14. Propagation delay vs. IF.
Figure 13. IFLH vs. temperature.
45
60
40
100
V CC = 10 V, V EE = 0 V
T A = 25°C
R g= 10 Ω, C g= 10nF
DUTY CYCLE = 50%
f = 200 kHz
65
20
0
0
1
2
3
4
5
6
7
Cg - SERIES LOAD CAPACITANCE - nF
Figure 18. Rise & Fall time vs. Cg.
8
9
10
IF - FORWARD CURRENT - mA
100
10
1
0.1
1.4
1.45
1.5
1.55
1.6
1.65
VF - FORWARD VOLTAGE - V
1.7
1.75
1.8
Figure 19. Input Current vs. forward voltage.
IF
1
IF = 7 to 11 mA ,
200kHz , 50%
Duty Cycle
6
tr
1 µF
2
VO
5
+
_
90%
50%
1 nF
3
tf
V CC = 10 V
V OUT
10%
4
tPLH
tPHL
Figure 20. tr and tf test circuit and waveforms.
V CM
232 Ω
1
5V
+
_
δt
1 µF
2
5
3
4
154 Ω
VO
V CC = 20 V
+
_
V CM = 1500V
Figure 21. CMR test circuit with split resistors network and waveforms.
=
V CM
∆t
0V
+
_
∆t
V OH
VO
SWITCH AT A:
12
δV
6
IF = 9 mA
VO
SWITCH AT B:
V OL
IF = 0 mA
Application Information
Recommended Application Circuit
Product Overview Description
The recommended application circuit shown in Figure 22
illustrates a typical gate drive implementation using the
ACPL-P346.
The ACPL-P346/W346 is an optically isolated power
output stage capable of driving power or SiC. Based on
BCDMOS technology, this gate drive optocoupler delivers higher peak output current, better rail-to-rail output
voltage performance and two times faster speed than the
previous generation products.
The high peak output current and short propagation delay are needed for fast MOSFET switching to reduce dead
time and improve system overall efficiency. Rail-to-rail
output voltage ensures that the MOSFET’s gate voltage is
driven to the optimum intended level with no power loss
across the MOSFET. This helps the designer lower the system power which is suitable for bootstrap power supply
operation.
It has very high CMR(common mode rejection) rating
which allows the microcontroller and the MOSFET to operate at very large common mode noise found in industrial motor drives and other power switching applications.
The input is driven by direct LED current and has a hysteresis that prevents output oscillation if insufficient LED
driving current is applied. This will eliminates the need of
additional Schmitt trigger circuit at the input LED.
The supply bypass capacitors (1 µF) provide the large transient currents necessary during a switching transition. Because of the transient nature of the charging currents, a
low current (4.0 mA) power supply will be enough to power the device. The split resistors (in the ratio of 1.5:1) across
the LED will provide a high CMR response by providing a
balanced resistance network across the LED.
The gate resistor RG serves to limit gate charge current
and controls the MOSFET switching times.
In PC board design, care should be taken to avoid routing
the MOSFET drain or source traces close to the ACPL-P346
input as this can result in unwanted coupling of transient
signals into ACPL-P346 and degrade performance.
The stretched SO6 package which is up to 50% smaller
than conventional DIP package facilitates smaller and
more compact design. These stretched packages are compliant to many industrial safety standards such as IEC/EN/
DIN EN 60747-5-5, UL 1577 and CSA.
232Ω
+
_
ANODE
1
NC
2
154Ω CATHODE
3
VCC
6
VOUT
5
VEE
4
1µF
Rg
VCC =10V
+
_
+ HVDC
Q1
Q2
Figure 22. Recommended application circuit with split resistors LED.
13
- HVDC
Selecting the Gate Resistor (Rg)
Step 1: Calculate Rg minimum from the IOL peak specification. The MOSFET and Rg in Figure 22 can be analyzed as
a simple RC circuit with a voltage supplied by ACPL-P346/
W346.
Rg ≥ VCC −VEE − R DSON ( MIN )
I OLPEAK
10 − 0V
− 0.3Ω
2.5 A
= 3.7Ω
The external gate resistor, Rg and internal minimum turnon resistance, RDSON will ensure the output current will
not exceed the device absolute maximum rating of 2.5 A.
=
Step 1: Check the ACPL-P346/W346 power dissipation and
increase Rg if necessary. The ACPL-P346/W346 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-VEE) + PHS + PLS
PHS = (VCC*QG*f ) * RDS,OH(MAX) / (RDS,OH(MAX)+Rg) / 2
PLS = (VCC*QG*f ) * RDS,OL(MAX) / (RDS,OL(MAX)+Rg) / 2
Using IF(worst case) = 11 mA, Rg = 3.7 Ω,
Max Duty Cycle = 80%, QG = 100 nC (650V 20A MOSFET),
f = 200 kHz and TA max = 85 °C:
PE
= 11mA • 1.95V • 0.8 = 17mW
PHS = (10V • 100nC • 200 kHz) • 3.5Ω/(3.5Ω+3.7Ω)/2
= 48.6mW
PLS = (10V • 100nC • 200 kHz) • 2.0Ω/(2.0Ω+3.7Ω)/2
= 35.1mW
PO = 4mA • 10V + 48.6mW + 35.1mW
= 123.7mW < 500 mW (PO(MAX) @ 85 °C)
The value of 4 mA for ICC in the previous equation is the
maximum ICC over the entire operating temperature
range.
Since PO is less than PO(MAX), Rg = 3.7 Ω is alright for the
power dissipation.
14
VDD = 5.0 V:
R 1 = 232 Ω ± 1%
R 2 = 154 Ω ± 1%
R 1 /R2 ≈ 1.5
+5 V
R 1 ANODE
1
ILP
C LA
2
µC
R2
3
CATHODE
6 VCC
5
VOUT
ILN
C LC
4 VEE
Figure 23. Recommended high-CMR drive circuit for the ACPL-P346/W346.
LED Drive Circuit Considerations for High CMR Performance
Figure 23 shows the recommended drive circuit for the
ACPL-P346/W346 that gives optimum common-mode
rejection. The two current setting resistors balance the
common mode impedances at the LED’s anode and cathode. Common-mode transients can be capacitive coupled
from the LED anode, through CLA (or cathode through
CLC) to the output-side ground causing current to be
shunted away from the LED (which is not wanted when
the LED should be on) or conversely cause current to be
injected into the LED (which is not wanted when the LED
should be off ).
Table 8 shows the directions of ILP and ILN depend on the
polarity of the common-mode transient. For transients
occurring when the LED is on, common-mode rejection
(CMH, since the output is at "high" state) depends on LED
current (IF). For conditions where IF is close to the switching threshold (IFLH), CMH also depends on the extent to
which ILP and ILN balance each other. In other words, any
condition where a common-mode transient causes a momentary decrease in IF (i.e. when dVCM/dt > 0 and |ILP| >
|ILN|, referring to Table 8) will cause a common-mode failure for transients which are fast enough.
Likewise for a common-mode transient that occurs when
the LED is off (i.e. CML, since the output is at "low" state),
if an imbalance between ILP and ILN results in a transient
IF equal to or greater than the switching threshold of the
optocoupler, the transient “signal” may cause the output
to spike above 1 V, which constitutes a CML failure. The
balanced ILED-setting resistors help equalize the common mode voltage change at the anode and cathode. The
shunt drive input circuit will also help to achieve high CML
performance by shunting the LED in the off state.
Table 8. Common Mode Pulse Polarity and LED current Transients
dVCM/dt
ILP Direction
ILP Direction
If |ILP| < |ILN|,
IF is momentarily
If |ILP| > |ILN|,
IF is momentarily
Positive (>0)
Away from LED anode through CLA
Away from LED cathode through CLC
Increase
Decrease
Toward LED cathode through CLC
Decrease
Increase
Negative(<0) Toward LED anode through CLA
Dead Time and Propagation Delay Specifications
The ACPL-P346/W346 includes a Propagation Delay Difference (PDD) specification intended to help designers minimize “dead time” in their power inverter designs. Dead
time is the time period during which both the high and
low side power transistors (Q1 and Q2 in Figure 22) are off.
Any overlap in Q1 and Q2 conduction will result in large
currents flowing through the power devices between the
high and 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
24. The amount of delay necessary to achieve this condition is equal to the maximum value of the propagation
delay difference specification, PDDMAX, which is specified
to be 100 ns over the operating temperature range of 40
°C to 105 °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 specifications as shown in
Figure 25. The maximum dead time for the ACPL-P346/
W346 is 100 ns (= 50 ns - (-50 ns)) over an operating temperature range of -40 °C to 105 °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 MOSFETs.
LED Current Input with Hysteresis
The detector has optical receiver input stage with built in
Schmitt trigger to provide logic compatible waveforms,
eliminating the need for additional wave shaping. The
hysteresis (Figure 12) provides differential mode noise
immunity and minimizes the potential for output signal
chatter.
15
ILED1
VOUT1
VOUT2
ILED2
Q1 ON
Q1 OFF
Q2 ON
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 24. Minimum LED skew for zero dead time
ILED1
VOUT1
VOUT2
ILED2
Q1 ON
Q1 OFF
Q2 ON
Q2 OFF
tPLH MIN
tPHL MAX
tPLH MIN
(tPHL - tPLH) MAX
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.
Figure 25. Waveforms for dead time
Thermal Model for ACPL-P346/W346 Stretched SO6 Package Optocoupler
Definitions:
R11: Junction to Ambient Thermal Resistance of LED due
to heating of LED
R12: Junction to Ambient Thermal Resistance of LED due
to heating of Detector (Output IC)
This thermal model assumes that an 6-pin single-channel
plastic package optocoupler is soldered into a 7.62 cm x
7.62 cm printed circuit board (PCB) per JEDEC standards.
The temperature at the LED and Detector junctions of the
optocoupler can be calculated using the equations below.
R21: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of LED.
T1 = (R11 * P1 + R12 * P2) + Ta -- (1)
R22: Junction to Ambient Thermal Resistance of Detector
(Output IC) due to heating of Detector (Output IC).
Using the given thermal resistances and thermal model
formula in this datasheet, we can calculate the junction
temperature for both LED and the output detector. Both
junction temperatures should be within the absolute
maximum rating.
P1: Power dissipation of LED (W).
P2: Power dissipation of Detector / Output IC (W).
T1: Junction temperature of LED (˚C).
T2 = (R21 * P1 + R22 * P2) + Ta -- (2)
For example, given P1 = 17 mW, P2 = 124 mW, Ta = 85 °C:
T2: Junction temperature of Detector (˚C).
Ta: Ambient temperature.
LED junction temperature,
Ambient Temperature: Junction to Ambient Thermal Resistances were measured approximately 1.25 cm above
optocoupler at ~23 ˚C in still air
T1 = (R11 * P1 + R12 * P2) + Ta
= (135 * 0.017 + 27 * 0.124) + 85
= 90.7 °C
Thermal Resistance
°C/W
Output IC junction temperature,
R11
135
R12
27
R21
39
R22
47
T2 = (R21 x P1 + R22 x P2) + Ta
= (39 *0.017 + 47 * 0.124) + 85
= 91.5 °C
T1 and T2 should be limited to 125 °C based on the board
layout and part placement.
Related Documents
AV02-0421EN
Application Note 5336
Gate Drive Optocoupler Basic Design for IGBT / MOSFET
AV02-3698EN
Application Note 1043
Common-Mode Noise: Sources and Solutions
AV02-0310EN
Reliability Data
Plastics Optocouplers Product ESD and Moisture Sensitivity
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Data subject to change. Copyright © 2005-2013 Avago Technologies. All rights reserved.
AV02-4078EN - May 10, 2013