ACPL-K43T, ACPL-K44T
Automotive R2Coupler® Wide Operating Temperature 1 MBd Digital
Optocoupler in a Stretched 8-Pin Surface Mount Plastic Package
Data Sheet
Lead (Pb) Free
RoHS 6 fully
compliant
RoHS 6 fully compliant options available;
-xxxE denotes a lead-free product
Description
Features
The ACPL-K43T is a single channel, high temperature,
high CMR, high speed digital optocoupler in an eight lead
miniature footprint specifically used in the automotive
applications. The ACPL-K44T is a dual channel equivalent of the ACPL-K43T. Both products are available in the
stretched SO-8 package outline, designed to be compatible with standard surface mount processes.
High Temperature and Reliability low speed digital
interface for Automotive Application
This digital optocoupler uses an insulating layer between
the light emitting diode and an integrated photo detector
to provide electrical insulation between input and output.
Separate connections for the photodiode bias and output
transistor collector increase the speed up to a hundred
times over that of a conventional photo-transistor coupler
by reducing the base-collector capacitance.
Avago R2Coupler® isolation products provide with reinforced insulation and reliability that delivers safe signal
isolation critical in automotive and high temperature
industrial applications.
Ultra low drive for status feedback at IF = 0.8 mA or
1.5 mA
30 kV/s (Typ) High Common-Mode Rejection at VCM =
1500 V
Compact, Auto-Insertable Stretched SO8 Packages
Qualified to AEC Q100 Grade 1 Test Guidelines
Wide Operating Temperature Range: –40°C to +125°C
High Speed: 1 MBd
Low Propagation Delay: 1 s max. at IF = 10 mA
Worldwide Safety Approval:
– UL 1577 approval, 5 kVRMS/1 min.
– CSA Approval
– IEC/EN/DIN EN 60747-5-5
Applications
Functional Diagram
ACPL-K43T
Automotive IPM Driver for DC-DC converters and
motor inverters
ACPL-K44T
ANODE 1
8 VCC
ANODE1 1
8 VCC
Status Feedback and Wake-Up Signal Isolation
CATHODE 2
7 VO
CATHODE1 2
7 VO1
CANBus and SPI Communications Interface
NC 3
6 NC
CATHODE2 3
6 VO2
High Temperature Digital/Analog Signal Isolation
NC 4
5 GND
ANODE2 4
5 GND
Truth Table
LED
Vo
ON
LOW
OFF
HIGH
Note: The connection of a 0.1 F bypass capacitor between pins 5 and 8
is recommended.
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
Specify part number followed by option number (if desired).
Part number
Option
(RoHS Compliant)
ACPL-K43T
-000E
-060E
Surface
Mount
Package
Stretched
SO-8
-500E
-560E
ACPL-K44T
-000E
-060E
Stretched
SO-8
Tape &
Reel
UL 5000 Vrms /
1 Minute rating
X
X
X
X
X
X
X
X
IEC/EN/DIN EN
60747-5-5
80 per tube
X
80 per tube
X
1000 per reel
X
X
X
X
X
-500E
X
X
X
-560E
X
X
X
Quantity
X
1000 per reel
80 per tube
X
80 per tube
1000 per reel
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-K43T-560E to order product of SSO-8 Surface Mount package in Tape and Reel packaging with IEC/EN/DIN EN
60747-5-5 Safety Approval in RoHS compliant.
Option datasheets are available. Contact your Avago sales representative or authorized distributor for information.
Schematic
ACPL-K43T
ACPL-K44T
ICC
+
8
VCC
IF
ICC
1 IF1
+
8
VF1
IO1
–
2
ANODE
1
VF
IO
7
VO
–
CATHODE
3
3
–
7
IO2
6
VO2
+
5
GND
4
5
USE OF 0.1 PF BYPASS CAPACITOR CONNECTED
BETWEEN PINS 5 AND 8 IS RECOMMENDED.
2
VO1
IF2
VF2
SHIELD
VCC
GND
Package Outline Dimensions (Stretched SO8)
RECOMMENDED LAND PATTERN
5.850 ± 0.254
(0.230 ± 0.010)
PART NUMBER
DATE CODE
8
7
6
5
KXXT
YWW
EE
RoHS-COMPLIANCE
INDICATOR
1
2
12.650
(0.498)
6.807 ± 0.127
(0.268 ± 0.005)
1.905
(0.075)
3
4
EXTENDED DATECODE
FOR LOT TRACKING
0.64
(0.025)
7°
1.590 ± 0.127
(0.063 ± 0.005)
45°
0.450
(0.018)
3.180 ± 0.127
(0.125 ± 0.005)
0.200 ± 0.100
(0.008 ± 0.004)
0.381 ± 0.127
(0.015 ± 0.005)
1.270
(0.050) BSG
0.750 ± 0.250
(0.0295 ± 0.010)
11.50 ± 0.250
(0.453 ± 0.010)
0.254 ± 0.100
(0.010 ± 0.004)
Dimensions in millimeters and (inches).
Note:
Lead coplanarity = 0.1 mm (0.004 inches).
Floating lead protrusion = 0.25mm (10mils) max.
Recommended Pb-Free IR Profile
Recommended reflow condition as per JEDEC Standard, J-STD-020 (latest revision).
Note: Non-halide flux should be used.
Regulatory Information
The ACPL-K43T and ACPL-K44T are approved by the following organizations:
UL
UL 1577, component recognition program up to VISO = 5 kVRMS.
CSA
CSA Component Acceptance Notice #5.
IEC/EN/DIN EN 60747-5-5
IEC 60747-5-5
EN 60747-5-5
DIN EN 60747-5-5
3
Insulation and Safety Related Specifications
Parameter
Symbol
ACPL-K43T
ACPL-K44T
Units
Conditions
Minimum External Air Gap
(Clearance)
L(101)
8
mm
Measured from input terminals to output terminals,
shortest distance through air.
Minimum External Tracking
(Creepage)
L(102)
8
mm
Measured from input terminals to output terminals,
shortest distance path along body.
0.08
mm
Through insulation distance conductor to conductor,
usually the straight line distance thickness between
the emitter and detector.
175
V
DIN IEC 112/VDE 0303 Part 1
Minimum Internal Plastic Gap
(Internal Clearance)
Tracking Resistance
(Comparative Tracking Index)
CTI
Isolation Group (DIN VDE0109)
IIIa
Material Group (DIN VDE 0109)
IEC/EN/DIN EN 60747-5-5 Insulation Related Characteristic (Option 060E and 560E)
Description
Symbol
Characteristic
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 ≤ 450 Vrms
for rated mains voltage ≤ 600 Vrms
for rated mains voltage ≤ 1000 Vrms
I – IV
I – IV
I – IV
I – IV
I – III
Climatic Classification
55/100/21
Pollution Degree (DIN VDE 0110/1.89)
2
Units
Maximum Working Insulation Voltage
VIORM
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
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
1824
Vpeak
Highest Allowable Overvoltage (Transient Overvoltage tini = 60 sec)
VIOTM
8000
Vpeak
Safety Limiting Values (Maximum values allowed in the event of a failure)
Case Temperature
Input Current
Output Power
TS
IS, INPUT
PS, OUTPUT
175
230
600
°C
mA
mW
Insulation Resistance at TS, VIO = 500 V
RS
>109
4
Absolute Maximum Ratings
Parameter
Symbol
Min.
Max.
Units
Storage Temperature
TSTG
-55
150
°C
Operating Ambient Temperature
TA
-40
125
°C
Average Forward Input Current
IF(avg)
20
mA
Peak Forward Input Current
(50% duty cycle, 1 ms pulse width)
IF(peak)
40
mA
Peak Transient Input Current
(≤ 1 s pulse width, 300 ps)
IF(trans)
100
mA
Reversed Input Voltage
VR
5
V
Input Power Dissipation (per channel)
PIN
30
mW
Output Power Dissipation
PO
100
mW
Average Output Current
IO
8
mA
Peak Output Current
IO(pk)
16
mA
Supply Voltag
VCC
-0.5
30
V
Output Voltage
VO
-0.5
20
V
Temperature
260
°C
Time
10
s
Max.
Units
20
V
125
°C
Lead Soldering Cycle
Note
Recommended Operating Conditions
Parameter
Symbol
Supply Voltage
VCC
Operating Temperature
TA
Min.
-40
Note
Electrical Specifications (DC)
Over recommended operating TA = -40° C to 125° C, unless otherwise specified
Parameter
Sym.
Min.
Typ.
Max.
Units
Test Conditions
Fig.
Current Transfer Ratio
CTR
32
65
100
%
TA = 25°C
1, 2, 4 1
24
65
33
160
VCC = 4.5 V, VO = 0.4 V, IF = 1.5 mA
25
165
VCC = 4.5 V, VO = 0.4 V, IF = 0.8 mA
Logic Low Output
Voltage
VOL
Logic High Output
Current
IOH
Logic Low Supply
Current (per Channel)
ICCL
Logic High Supply
Current (per Channel)
ICCH
Input Forward Voltage
VF
0.1
0.5
V
VCC = 4.5 V, IO = 0.2 mA, IF = 0.8 mA
0.1
Input Reversed
Breakdown Voltage
VCC = 4.5 V, IO = 2.4 mA, IF = 10 mA
VCC = 4.5 V, IO = 0.5 mA, IF = 1.5 mA
0.1
3x10-5
0.5
8x10-5
5
85
200
A
TA = 25°C
A
IF = 0 mA
11, 12
IF = 10 mA, VO = open, VCC = 20 V
IF = 1.5 mA, VO = open, VCC = 20 V
1
A
TA = 25°C
IF = 0 mA, VO = open, VCC = 20 V
V
TA = 25°C
IF = 10 mA
V
IR = 10 A
2.5
BVR
1.45
1.55
1.75
1.25
1.55
1.85
5
Temperature Coefficient VF/
TA
of Forward Voltage
–1.5
mV/°C IF =10 mA
–1.8
IF =1.5 mA
Input Capacitance
90
5
VO = VCC = 5.5 V
VO = VCC = 20 V
15
0.02
VCC = 4.5 V, VO = 0.4 V, IF = 10 mA
CIN
pF
F = 1 MHz, VF = 0
3
Note
Switching Specifications (AC)
Over recommended operating (TA = –40°C to 125°C), VCC = 5.0 V unless otherwise specified.
Parameter
Symbol
Min
Typ
Max
Units
Test Conditions
Fig.
Propagation Delay
Time to Logic Low
at Output
tPHL
0.07
0.15
0.8
s
TA = 25°C
5, 6, 7, 2, 3
8, 9, 10,
13
Propagation Delay
Time to Logic High
at Output
0.06
tPLH
0.15
1.0
0.7
5
1
10
0.5
0.8
0.03
5
2
10
Pulse Width
Distortion
PWD
0.35
0.45
Propagation Delay
Difference Between
Any 2 Parts
PDD
0.35
0.5
Pulse: f = 10 kHz,
Duty cycle = 50%,
VCC = 5.0 V, CL = 15 pF,
IF = 1.5 mA,
V THHL = 1.5 V
RL = 10 k
IF = 0.8 mA,
RL = 27 k
s
TA = 25°C
1.0
0.9
IF = 10 mA,
RL = 1.9 k
Note
IF = 10 mA,
RL = 1.9 k
Pulse: f = 10 kHz,
Duty cycle = 50%,
VCC = 5.0 V, CL = 15 pF,
IF = 1.5 mA, V
THHL = 2.0 V
RL = 10 k
5, 6, 7, 2, 3
8, 9, 10,
13
IF = 0.8 mA,
RL = 27 k
s
TA = 25°C
Pulse: f = 10 kHz, Duty cycle = 50%,
IF = 10 mA, VCC = 5.0 V, RL = 1.9 k,
2, 3, 4
s
TA = 25°C
Pulse: f = 10 kHz, Duty cycle = 50%,
IF = 10 mA, VCC = 5.0 V, RL = 1.9 k,
CL = 15 pF, V THHL = 1.5 V,
2, 3, 5
0.85
0.9
Common Mode
|CMH|
Transient Immunity
at Logic High Output
15
30
kV/s IF = 0 mA
Common Mode
|CML|
Transient Immunity
at Logic Low Output
15
30
kV/s IF = 10 mA
Common Mode
|CMH|
Transient Immunity
at Logic High Output
5
kV/s IF = 0 mA
Common Mode
|CML|
Transient Immunity
at Logic Low Output
5
kV/s IF = 1.5 mA
VCM = 1500 Vp-p, RL = 1.9 k,
VCC = 5 V, TA = 25°C
14
6
VCM = 1500 Vp-p, RL = 10 k,
VCC = 5 V, TA = 25°C
14
6
Package Characteristics
Parameter
Symbol
Min.
Input-Output Momentary
Withstand Voltage*
VISO
5000
Input-Output Resistance
RI-O
Input-Output Capacitance
CI-O
*
Typ.
Max.
Units
Test Conditions
VRMS
RH ≤ 50%, t = 1 min.,
TA = 25°C
Fig.
Note
1014
VI-O = 500 Vdc
7
0.6
pF
f = 1 MHz, VI-O = 0 Vdc
7
7, 8
The Input-Output Momentary Withstand Voltage is a dielectric voltage rating that should not be interpreted as an input-output continuous
voltage rating.
Notes:
1. Current Transfer Ratio in percent is defined as the ratio of output collector current, IO, to the forward LED input current, IF, times 100.
2. Use of a 0.1 F bypass capacitor connected between pins 5 and 8 is recommended.
3. The 1.9 k load represents 1 TTL unit load of 1.6 mA and the 5.6 k pull-up resistor.
4. Pulse Width Distortion (PWD) is defined as |tPHL – tPLH| for any given device.
5. The difference between tPLH and tPHL between any two parts under the same test condition.
6. Common transient immunity in a Logic High level is the maximum tolerable (positive) dVCM/dt on the rising edge of the common mode pulse, VCM,
to assure that the ouput will remain in a Logic High state (i.e., VO > 2.0 V). Common mode transient immunity in a Logic Low level is the maximum
tolerable (negative) dVCM/dt on the falling edge of the common mode pulse signal, VCM to assure that the output will remain in a Logic Low state
(i.e., VO < 0.8 V).
7. Device considered a two terminal device: pins 1, 2, 3 and 4 shorted together, and pins 5, 6, 7 and 8 shorted together.
8. In accordance with UL 1577, each optocoupler is proof tested by applying an insulation test voltage > 6000 VRMS for 1 second.
6
VCC = 5.0 V
TA = 25° C
IO - OUTPUT CURRENT - mA
25
40 mA
35 mA
30 mA
25 mA
20 mA
20
15 mA
15
10 mA
10
IF = 5 mA
5
0
0
10
VO - OUTPUT VOLTAGE - V
20
Figure 1. DC and Pulsed Transfer Characteristics
NORMALIZED CURRENT TRANSFER RATIO
IF - FORWARD CURRENT - mA
TA = 125° C
TA = 25° C
TA = -40° C
1.20
1.30
1.40
1.50 1.60
1.70
VF - FORWARD VOLTAGE - V
1.80
1.90
2.0
1.5
1.0
0.5
0.0
0.1
1.0
10.0
IF - INPUT CURRENT - mA
100.0
1.0
0.9
Normalized
IF = 10 mA,
VO = 0.4 V
VCC = 5.0 V
TA = 25° C
0.8
0.7
0.6
-60
-20
20
60
TA - TEMPERATURE - °C
100
140
Figure 4. Current Transfer Ratio vs. Temperature
1.2
TLH, Vcc = 5 V
TLH, Vcc = 3.3 V
THL, Vcc = 5 V
THL, Vcc = 3.3 V
1.2
1.0
0.8
0.6
0.4
0.2
Propagation Delay Time - μs
1.4
Propagation Delay Time - μs
2.5
1.1
Figure 3. Input Current vs. Forward Voltage
TLH, Vcc = 20 V
TLH, Vcc = 15 V
THL, Vcc = 20 V
THL, Vcc = 15 V
1.0
0.8
0.6
0.4
0.2
0.0
0.0
-55
-35
-15
5 25 45 65 85 105 125 145
Ambient Temperature TA - °C
Figure 5, Propagation Delay Time vs. Temperature
IF = 10 mA, RL = 1.9 k, CL = 15 pF
7
3.0
Figure 2. Current Transfer Ratio vs. Input Current VO = 0.4 V, VCC = 5 V, TA = 25°C
10.0
1.0
NORMALIZED CURRENT TRANSFER RATIO
30
-55
-35 -15
5 25 45 65 85 105 125 145
Ambient Temperature TA - °C
Figure 6. Propagation Delay Time vs. Temperature
IF = 10 mA, RL = 20 k, CL = 100 pF
TLH, Vcc = 5 V
TLH, Vcc = 3.3 V
THL, Vcc = 5 V
THL, Vcc = 3.3 V
2.5
2.0
Propagation Delay TP - μs
Propagation Delay TP - μs
3.0
1.5
1.0
0.5
0.0
1
2
3
4
5
6
7
Load Resistance RL - kΩ
8
9
10
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
TLH, Vcc = 5 V
TLH, Vcc = 3.3 V
THL, Vcc = 5 V
THL, Vcc = 3.3 V
10
11
12
13
14
Input Current IF - mA
15
16
TLH, Vcc = 5 V
TLH, Vcc = 3.3 V
THL, Vcc = 5 V
THL, Vcc = 3.3 V
Propagation Delay Tp (μs)
Propagation Delay Tp (μs)
3
2
1.5
1
0.5
0
1.5
2
2.5
3
3.5
4
Input Current IF (mA)
Figure 10a. Propagation Delay Time vs. Input Current
RL = 10 k, CL = 15 pF, TA = 25°C
8
5
10
15
20
25
30
35
Load Resistance RL - kΩ
40
45
50
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
TLH, Vcc = 20 V
TLH, Vcc = 15 V
THL, Vcc = 20 V
THL, Vcc = 15 V
10
11
12
13
14
Input Current IF - mA
15
16
Figure 10. Propagation Delay Time vs. Input Current
RL = 20 k, CL = 15 pF, TA = 25°C
Figure 9. Propagation Delay Time vs. Input Current
RL = 1.9 k, CL = 15 pF, TA = 25°C
2.5
TLH, Vcc = 20 V
TLH, Vcc = 15 V
THL, Vcc = 20 V
THL, Vcc = 15 V
Figure 8. Propagation Delay Time vs. Load Resistance
Propagation Delay TP - μs
Propagation Delay TP - μs
Figure 7. Propagation Delay Time vs. Load Resistance
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
4.5
5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
TLH, Vcc = 5 V
TLH, Vcc = 3.3 V
THL, Vcc = 5 V
THL, Vcc = 3.3 V
0.8
1
1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8
Input Current IF (mA)
Figure 10b. Propagation Delay Time vs. Input Current
RL = 27 k, CL = 15 pF, TA = 25°C
3
1000
100
100
10
TA = 125° C
IF = 0 mA
VCC = VO
1
IOH - LOGIC HIGH OUTPUT - nA
IOH - LOGIC HIGH OUTPUT - nA
1000
TA = 25° C
0.1
0.01
TA = -40° C
0.001
0.0001
2
4
6
8
10 12
14
VCC - SUPPLY VOLTAGE - V
16
18
IF = 0 mA
VCC = VO = 5 V
10
1
0.1
0.01
0.001
0.0001
-50
20
Figure 11. Logic High Output Current vs. Supply Voltage
0
50
100
TA - TEMPERATURE - °C
Figure 12. Logic High Output Current vs. Temperature
10% DUTY CYCLE
1/f < 100 μs
PULSE
GEN.
ZO = 50 Ω
tr = 5 ns
IF
0
1.5 V
+5 V
IF MONITOR
5V
VO
IF
100 Ω
2.0 V
8
2
7
3
6
4
5
RL
VO
0.1 μF
CL = 15 pF
VOL
tPHL
1
tPLH
Figure 13. Switching Test Circuit
IF
1500 V
VCM
0V
VCC
tr, tf = 80 ns
10%
90%
tr
90%
B
10%
1
8
2
7
tf
5V
SWITCH AT A: IF = 0 mA
VO
VOL
SWITCH AT B: IF = 10 mA
3
6
4
5
+
-
VCM
PULSE GEN.
Figure 14. Test Circuit for Transient Immunity and Typical Waveforms
9
VO
0.1 μF
VFF
VO
RL
A
150
Thermal Resistance Model for ACPL-K43T
The diagram of ACPL-K43T for measurement is shown in Figure 15. Here, one die is heated first and the temperatures of
all the dice are recorded after thermal equilibrium is reached. Then, the 2nd die is heated and all the dice temperatures
are recorded. With the known ambient temperature, the die junction temperature and power dissipation, the thermal
resistance can be calculated. The thermal resistance calculation can be cast in matrix form. This yields a 2 by 2 matrix for
our case of two heat sources.
R11
R21
R12
R22
X
P1
P2
=
T1
T2
1
R11 : Thermal Resistance of Die1 due to heating of Die1 (˚C/W)
2
R12 : Thermal Resistance of Die1 due to heating of Die2 (˚C/W)
R21 : Thermal Resistance of Die2 due to heating of Die1 (˚C/W)
R22 : Thermal Resistance of Die2 due to heating of Die2 (˚C/W)
8
Die1:
LED
Die2:
Detector
7
3
6
4
5
P1 : Power dissipation of Die1 (W)
Figure 15. Diagram of ACPL-K43T for measurement
P2 : Power dissipation of Die2 (W)
T1 : Junction temperature of Die1 due to heat from all dice (˚C)
T2 : Junction temperature of Die2 due to heat from all dice (˚C)
Ta : Ambient temperature (˚C)
T1 : Temperature difference between Die1 junction and ambient (˚C)
T2 : Temperature deference between Die2 junction and ambient (˚C)
T1 = (R11 x P1 + R12 x P2) + Ta
T2 = (R21 x P1 + R22 x P2) + Ta
Measurement data on a low K board:
R11 = 160°C/W, R12= R21 = 74°C/W, R22 = 115°C/W
Thermal Resistance Model for ACPL-K44T
The diagram of ACPL-K44T for measurement is shown in Figure 16. Here, one die is heated first and the temperatures of
all the dice are recorded after thermal equilibrium is reached. Then, the 2nd ,3rd and 4th die is heated and all the dice
temperatures are recorded. With the known ambient temperature, the die junction temperature and power dissipation,
the thermal resistance can be calculated. The thermal resistance calculation can be cast in matrix form. This yields a 4 by
4 matrix for our case of two heat sources.
R11
R21
R31
R41
R11
R12
R13
R14
R21
R22
R23
R24
10
R12
R22
R32
R42
R13
R23
R33
R43
R14
R24
R34
R44
X
P1
P2
P3
P4
=
T1
T2
T3
T4
: Thermal Resistance of Die1 due to heating of Die1 (˚C/W)
: Thermal Resistance of Die1 due to heating of Die2 (˚C/W)
: Thermal Resistance of Die1 due to heating of Die3 (˚C/W)
: Thermal Resistance of Die1 due to heating of Die4 (˚C/W)
: Thermal Resistance of Die2 due to heating of Die1 (˚C/W)
: Thermal Resistance of Die2 due to heating of Die2 (˚C/W)
: Thermal Resistance of Die2 due to heating of Die3 (˚C/W)
: Thermal Resistance of Die2 due to heating of Die4 (˚C/W)
1
8
Die1:
LED 1
Die2:
Detector 1
2
3
4
7
Die3:
LED 1
Die4:
Detector 2
6
5
Figure 16. Diagram of ACPL-K44T for measurement
R31 : Thermal Resistance of Die3 due to heating of Die1 (˚C/W)
R32 : Thermal Resistance of Die3 due to heating of Die2 (˚C/W)
R33 : Thermal Resistance of Die3 due to heating of Die3 (˚C/W)
R34 : Thermal Resistance of Die3 due to heating of Die4 (˚C/W)
R41 : Thermal Resistance of Die4 due to heating of Die1 (˚C/W)
R42 : Thermal Resistance of Die4 due to heating of Die2 (˚C/W)
R43 : Thermal Resistance of Die4 due to heating of Die3 (˚C/W)
R44 : Thermal Resistance of Die4 due to heating of Die4 (˚C/W)
P1 : Power dissipation of Die1 (W)
P2 : Power dissipation of Die2
P3 : Power dissipation of Die3 (W)
P4 : Power dissipation of Die4
T1 : Junction temperature of Die1 due to heat from all dice (˚C)
T2 : Junction temperature of Die2 due to heat from all dice (˚C)
T3 : Junction temperature of Die3 due to heat from all dice (˚C)
T4 : Junction temperature of Die4 due to heat from all dice (˚C)
Ta : Ambient temperature (˚C)
T1 : Temperature difference between Die1 junction and ambient (˚C)
T2 : Temperature deference between Die2 junction and ambient (˚C)
T3 : Temperature difference between Die3 junction and ambient (˚C)
T4 : Temperature deference between Die4 junction and ambient (˚C)
T1 = (R11 x P1 + R12 x P2 + R13 x P3 + R14 x P4 ) + Ta -- (1)
T2 = (R21 x P1 + R22 x P2 + R23 x P3 + R24 x P4) + Ta -- (2)
T3 = (R31 x P1 + R32 x P2 + R33 x P3 + R34 x P4) + Ta -- (3)
T4 = (R41 x P1 + R42 x P2 + R43 x P3 + R44 x P4 ) + Ta -- (4)
Measurement data on a low K board:
R11
R12
R13
R14
R21
R22
R23
R24
R31
R32
R33
R34
R41
R42
R43
R44
160
76
76
76
76
115
76
76
76
76
160
76
76
76
76
115
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Data subject to change. Copyright © 2012–2016 Avago Technologies. All rights reserved.
AV02-3179EN - October 19, 2016