IOR 85CNQ015A User Manual
Bulletin PD-20044 rev. B 09/01
85CNQ015A
SCHOTTKY RECTIFIER
New GenIII D-61 Package
Major Ratings and Characteristics
Characteristics 85CNQ015A Units
I
Rectangular 80 A
F(AV)
V
RRM
I
@ tp = 5 µs sine 5200 A
FSM
VF@ 40 Apk, TJ = 75 °C 0.32 V
(per leg)
TJrange - 55 to 100 °C
85CNQ...A 85CNQ...ASM 85CNQ...ASL
waveform
15 V
80 Amp
Description/Features
The 85CNQ015A center tap Schottky rectifier module has
been optimized for ultra low forward voltage drop specifically
for the OR-ing of parallel power supplies. The proprietary
barrier technology allows for reliable operation up to 125 °C
junction temperature. Typical applications are in parallel
switching power supplies, converters, reverse battery protection, and redundant power subsystems.
125°C TJ operation (VR < 5V)
Center tap module
Optimized for OR-ing applications
Ultra low forward voltage drop
High frequency operation
Guard ring for enhanced ruggedness and long term
reliability
High purity, high temperature epoxy encapsulation for
enhanced mechanical strength and moisture resistance
New fully transfer-mold low profile, small
footprint, high current package
Case Styles
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D61-8
D61-8-SM D61-8-SL
1
85CNQ015A
Bulletin PD-20044 rev. B 09/01
Voltage Ratings
Part number 85CNQ015A
VRMax. DC Reverse Voltage (V) 15
V
Max. Working Peak Reverse Voltage (V) 25
RWM
Absolute Maximum Ratings
Parameters 85CNQ Units Conditions
I
Max. Average Forward Current 80 A 50% duty cycle @ TC = 78 °C, rectangular wave form
F(AV)
* See Fig. 5
I
Max. Peak One Cycle Non-Repetitive 5200 5µs Sine or 3µs Rect. pulse
FSM
Surge Current (Per Leg) * See Fig. 7 850 10ms Sine or 6ms Rect. pulse
EASNon-Repetitive Avalanche Energy 9 mJ T
(Per Leg)
A
= 25 °C, I
J
= 2 Amps, L = 4.50 mH
AS
IARRepetitive Avalanche Current 2 A Current decaying linearly to zero in 1 µsec
(Per Leg) Frequency limited by TJ max. VA = 3 x VR typical
Following any rated
load condition and with
rated V
RRM
applied
Electrical Specifications
Parameters 85CNQ Units Conditions
VFMMax. Forward Voltage Drop 0.36 V @ 40A
(Per Leg) * See Fig. 1 (1) 0.45 V @ 80A
0.32 V @ 40A
0.42 V @ 80A
IRMMax. Reverse Leakage Current 20 mA TJ = 25 °C
(Per Leg) * See Fig. 2 (1) 1000 mA TJ = 100 °C
890 mA TJ = 100 °C VR = 12V
540 mA TJ = 100 °C VR = 5V
CTMax. Junction Capacitance (Per Leg) 3600 pF VR = 5VDC, (test signal range 100Khz to 1Mhz) 25°C
LSTypical Series Inductance (Per Leg) 5.5 nH Measured lead to lead 5mm from package body
dv/dt Max. Voltage Rate of Change 10000 V/ µs
(Rated VR)
Thermal-Mechanical Specifications
Parameters 85CNQ Units Conditions
TJMax. Junction Temperature Range -55 to 125 °C
T
Max. Storage Temperature Range -55 to 150 °C
stg
R
Max. Thermal Resistance Junction 0.85 °C/W DC operation * See Fig. 4
thJC
to Case (Per Leg)
R
Max. Thermal Resistance Junction 0.42 °C/W DC operation
thJC
to Case (Per Package)
R
Typical Thermal Resistance, Case 0.30 °C/W Mounting surface , smooth and greased
thCS
to Heatsink (D61-8 Only) Device flatness < 5 mils
wt Approximate Weight 7.8 (0.28) g (oz.)
T Mounting Torque Min. 40 (35)
(D61-8 Only) Max. 58 (50)
Kg-cm
(Ibf-in)
TJ = 25 °C
TJ = 75 °C
VR = rated V
(1) Pulse Width < 300µs, Duty Cycle <2%
R
2
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85CNQ015A
Bulletin PD-20044 rev. B 09/01
1000
100
(A)
F
10
Instantaneous Forward Current - I
1
T = 100˚C
J
T = 75˚C
J
T = 25˚C
J
1000
Tj = 100˚C
(mA)
R
100
75˚C
50˚C
10
Reverse Current - I
1
0 5 10 15
25˚C
Reverse Voltage - VR (V)
Fig. 2 - Typical Values Of Reverse Current
Vs. Reverse Voltage (Per Leg)
10000
(p F)
T
T = 25˚C
J
0.1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
Fig. 1 - Max. Forward Voltage Drop Characteristics
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Junction Capacitance - C
1000
0 5 10 15 20
Forward Voltage Drop - VFM (V)
Reverse Voltage - VR (V)
Fig. 3 - Typical Junction Capacitance
(Per Leg)
Vs. Reverse Voltage (Per Leg)
1
D = 0.50
0.1
D = 0.33
D = 0.25
D = 0.17
D = 0.08
P
DM
t
1
t
2
(°C/W)
thJC
Notes:
Thermal Impedance Z
0.01
0.00001 0.0001 0.001 0.01 0.1 1 10 100
(Thermal Resistance)
Single Pulse
1. Duty factor D = t
2. Peak Tj = Pdm x ZthJC + Tc
1
/ t2
t1 , Rectangular Pulse Duration (Seconds)
Fig. 4 - Max. Thermal Impedance Z
Characteristics (Per Leg)
thJC
3
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