ONSEMI NIMD6302R2

NIMD6302R2
HDPlus Dual N-Channel
Self-protected Field Effect
Transistors with 1:200
Current Mirror FET
HDPlus devices are an advanced HDTMOS series of power
MOSFET which utilize ON’s latest MOSFET technology process to
achieve the lowest possible on–resistance per silicon area while
incorporating smart features. They are capable of withstanding high
energy in the avalanche and commutation modes. The avalanche
energy is specified to eliminate guesswork in designs where inductive
loads are switched and offer additional safety margin against
unexpected voltage transients.
This HDPlus device features an integrated Gate–to–Source clamp
for ESD protection. Also, this device features a mirror FET for current
monitoring.
• ±3.5% Current Mirror Accuracy in Linear Region
• ±15% Current Mirror Accuracy in Low Current Saturation Region
• IDSS Specified at Elevated Temperature
• Avalanche Energy Specified
• Current Sense FET
• ESD Protected on the Main and the Mirror FET
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5.0 AMPERES
30 VOLTS
RDS(on) = 50 m
ISOLATED DUAL PACKAGING
Drain1
Gate1
Mirror
Main
FET
Mirror1
Source1
Drain2
Main
FET
Mirror
Gate2
Mirror2
Source2
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these
or any other conditions beyond those indicated in this specification is not
implied. Exposure to absolute maximum rated conditions for extended periods may affect device reliability.
SOIC–8
CASE 751
STYLE 19
MAIN MOSFET MAXIMUM RATINGS (TJ = 25°C unless otherwise noted)
Symbol
Value
Unit
Drain–to–Source Voltage
VDSS
30
Vdc
Drain–to–Gate Voltage (RGS = 1.0 M)
VDGR
30
Vdc
VGS
16
Vdc
Rating
Gate–to–Source Voltage
Drain Current
– Continuous @ TA = 25°C
– Continuous @ TA = 100°C (Note 3)
– Pulsed (tp10 s)
Total Power Dissipation @ TA = 25°C (Note 1)
Total Power Dissipation @ TA = 25°C (Note 2)
Thermal Resistance
Junction–to–Ambient (Note 1)
Junction–to–Ambient (Note 2)
Single Pulse Drain–to–Source Avalanche
Energy (Note 3)
(VDD = 25 Vdc, VGS = 10 Vdc,
VDS = 20 Vdc, IL = 15 Apk, L = 10 mH, RG =
25 )
ID
ID
IDM
6.5
4.4
33
Adc
Adc
Apk
PD
PD
1.3
1.67
W
RJA
RJA
96
75
EAS
250
°C/W
mJ
MARKING DIAGRAM
Source 1
Gate 1
Source 2
Gate 2
1
8
2
7
3
N6302
AYWW
6
5
4
Mirror 1
Drain 1
Mirror 2
Drain 2
(Top View)
N6302
A
Y
WW
= Specific Device Code
= Assembly Location
= Year
= Work Week
ORDERING INFORMATION
Device
NIMD6302R2
Package
SOIC–8
Shipping
2500/Tape & Reel
1. Mounted onto min pad board.
2. Mounted onto 1″ pad board.
3. Switching characteristics are independent of operating junction temperatures.
 Semiconductor Components Industries, LLC, 2002
October, 2002 – Rev. 3
1
Publication Order Number:
NIMD6302R2/D
NIMD6302R2
MAIN MOSFET ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
Unit
30
20
35
23
–
30
Vdc
mV/°C
–
–
–
0.065
0.2
11
10
100
100
Adc
–
–
11
12
18
100
Adc
nAdc
1.0
1.1
–
1.33
1.17
3.8
2.0
–
4.6
Vdc
–
–
–
35
57
69
50
65
90
m
–
–
–
52
81
97
60
90
110
m
gFS
14.5
19.8
25
Mhos
Ciss
–
301
600
pF
Coss
–
265
350
Crss
–
82
200
td(on)
–
9.2
9.6
tr
–
56.5
75.3
td(off)
–
35.9
40
tf
–
36.3
40.6
td(on)
–
6.3
7.0
tr
–
2.7
3.1
td(off)
–
66.5
70.5
tf
–
36.5
39.4
QT
–
3.91
4.5
Q1
–
1.0
1.25
Q2
–
1.59
1.95
Q3
–
1.48
1.64
QT
–
8.03
13.6
Q1
–
1.06
1.36
Q2
–
1.75
2.82
Q3
–
1.54
1.75
OFF CHARACTERISTICS
Drain–to–Source Breakdown Voltage
(VGS = 0 Vdc, ID = 250 Adc)
Temperature Coefficient (Positive)
V(BR)DSS
Zero Gate Voltage Drain Current
(VDS = 30 Vdc, VGS = 0 Vdc)
(VDS = 30 Vdc, VGS = 0 Vdc, TJ = 125°C)
(VDS = 30 Vdc, VGS = 0 Vdc, TJ = 175°C)
IDSS
Gate–Body Leakage Current
(VGS = 12 Vdc, VDS = 0 Vdc)
(VGS = 3.0 Vdc, VDS = 0 Vdc)
IGSS
ON CHARACTERISTICS
Gate Threshold Voltage
(VDS = VGS, ID = 250 Adc)
(VDS = VGS, ID = 250 Adc, TJ = 75°C)
Threshold Temperature Coefficient (Negative)
VGS(th)
Static Drain–to–Source On–Resistance (Note 4)
(VGS = 10 Vdc, ID = 3.0 Adc, TJ @ 25°C)
(VGS = 10 Vdc, ID = 3.0 Adc, TJ @ 125°C)
(VGS = 10 Vdc, ID = 3.0 Adc, TJ @ 175°C)
RDS(on)
Static Drain–to–Source On–Resistance (Note 4)
(VGS = 4.5 Vdc, ID = 3.0 Adc, TJ @ 25°C)
(VGS = 4.5 Vdc, ID = 3.0 Adc, TJ @ 125°C)
(VGS = 4.5 Vdc, ID = 3.0 Adc, TJ @ 175°C)
RDS(on)
Forward Transconductance (Note 4) (VDS = 6.0 Vdc, ID = 15 Adc)
mV/°C
DYNAMIC CHARACTERISTICS (Note 5)
Input Capacitance
Output Capacitance
(VDS = 6.0 Vdc, VGS = 0 Vdc,
f = 1.0 MHz)
Transfer Capacitance
SWITCHING CHARACTERISTICS (Note 5)
Turn–On Delay Time
Rise Time
Turn–Off Delay Time
(VDD = 6.0 Vdc, ID = 2.0 Adc,
VGS = 4.5 Vdc, RG = 2.5 )
Fall Time
Turn–On Delay Time
Rise Time
Turn–Off Delay Time
(VDD = 6.0 Vdc, ID = 2.0 Adc,
VGS = 10 Vdc, RG = 2.5 )
Fall Time
Gate Charge
(VDS = 6.0 Vdc, ID = 2.0 Adc,
VGS = 4.5 Vdc)
Gate Charge
(VDS = 6.0 Vdc, ID = 2.0 Adc,
VGS = 10 Vdc)
4. Pulse Test: Pulse Width = 300 s, Duty Cycle = 2%.
5. Switching characteristics are independent of operating junction temperatures.
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2
ns
ns
nC
nC
NIMD6302R2
MAIN MOSFET ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise noted) (Continued)
Characteristic
Symbol
Min
Typ
Max
Unit
VSD
–
–
–
0.79
0 65
0.65
0.58
0.86
0 72
0.72
0.64
Vdc
trr
–
30.8
41
ns
ta
–
14.6
18
tb
–
15.2
20.2
QRR
–
0.020
0.03
C
IRAT
170
167
200
196
230
225
–
IRAT
170
200
230
–
IRAT
166
165
172
171
178
177
–
IRAT
166
172
184
–
IRAT
150
155
155
161
160
166
–
IRAT
150
155
166
–
IRAT
141
148
146
153
155
157
–
IRAT
141
146
157
–
SOURCE–DRAIN DIODE CHARACTERISTICS
Forward On–Voltage (Notes 6 & 7)
(IS = 3.0 Adc, VGS = 0 Vdc)
(IS = 3.0
3 0 Adc,
Adc VGS = 0 Vdc,
Vdc TJ = 125°C)
(IS = 3.0 Adc, VGS = 0 Vdc, TJ = 175°C)
Reverse Recovery Time (Note 7)
(IS = 3.0
3 0 Adc,
Adc VGS = 0 Vdc,
Vdc
dIS/dt = 100 A/s)
Reverse Recovery Stored Charge
(Note 7)
MIRROR MOSFET CHARACTERISTICS (TJ = 25°C unless otherwise noted)
Main/Mirror MOSFET Current Ratio
Operating in the Saturation Region
Main/Mirror Current Ratio Variation
versus Temperature Operating in
the Saturation Region
Main/Mirror MOSFET Current Ratio
Operating in the Linear Region
Main/Mirror Current Ratio Variation
versus Temperature Operating in
the Linear Region
Main/Mirror MOSFET Current Ratio
Operating in the Linear Region
Main/Mirror Current Ratio Variation
versus Temperature Operating in
the Linear Region
Main/Mirror MOSFET Current Ratio
Operating in the Linear Region
Main/Mirror Current Ratio Variation
versus Temperature Operating in
the Linear Region
(VDS = 6.0 Vdc, IDmain = 5.0 mA)
(VDS = 6.0 Vdc, IDmain = 5.0 mA,
TA = 125°C)
(VDS = 6.0 Vdc, IDmain = 5.0 mA,
TA = 25 to 125°C)
(VGS = 3.0 Vdc, IDmain = 1.0 A)
(VGS = 3.0 Vdc, IDmain = 1.0 A,
TA = 175°C)
(VGS = 3.0 Vdc, IDmain = 1.0 A,
TA = –40 to +175°C)
(VGS = 5.0 Vdc, IDmain = 1.0 A)
(VGS = 5.0 Vdc, IDmain = 1.0 A,
TA = 175°C)
(VGS = 5.0 Vdc, IDmain = 1.0 A,
TA = –40 to +175°C)
(VGS = 10 Vdc, IDmain = 1.0 A)
(VGS = 10 Vdc, IDmain = 1.0 A,
TA = 175°C)
(VGS = 10 Vdc, IDmain = 1.0 A,
TA = –40 to +175°C)
MAIN AND SENSE MOSFET ELECTRICAL CHARACTERISTICS (TJ = 25°C unless otherwise noted)
Electro–Static Discharge (ESD)
Capability
Charge Device Model (CDM)
Capability
Main FET
Sense FET
–
–
1800
1800
–
–
–
–
V
Main/Sense FET
–
2000
–
–
V
6. Pulse Test: Pulse Width = 300 s, Duty Cycle = 2%.
7. Switching characteristics are independent of operating junction temperatures.
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NIMD6302R2
TYPICAL ELECTRICAL CHARACTERISTICS
ID, DRAIN CURRENT (AMPS)
6
9V
5
8V
4
7V
7
4V
VGS = 10 V
5V
6V
3V
3
2
1
0
2V
0
VDS ≥ 10 V
TJ = 25°C
ID, DRAIN CURRENT (AMPS)
7
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
VDS, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
6
5
4
3
TJ = 25°C
2
TJ = 100°C
1
TJ = –55°C
0
1
1
2
3
4
5
6
VGS, GATE–TO–SOURCE VOLTAGE (VOLTS)
Figure 2. Transfer Characteristics
RDS(on), DRAIN–TO–SOURCE RESISTANCE ()
RDS(on), DRAIN–TO–SOURCE RESISTANCE ()
Figure 1. On–Region Characteristics
0.07
VGS = 10 V
0.06
TJ = 100°C
0.05
0.04
TJ = 25°C
0.03
TJ = –55°C
0.02
0.01
0
1
2
3
4
6
5
ID, DRAIN CURRENT (AMPS)
0.07
TJ = 25°C
0.06
VGS = 4.5 V
0.05
0.04
VGS = 10 V
0.03
0.02
0.01
0
1
RDS(on), DRAIN–TO–SOURCE RESISTANCE
(NORMALIZED)
2
3
4
5
7
6
ID, DRAIN CURRENT (AMPS)
Figure 3. On–Resistance versus
Drain Current and Temperature
Figure 4. On–Resistance versus Drain Current
and Gate Voltage
1000
1.5
VGS = 0 V
VGS = 10 V
ID = 3 A
IDSS, LEAKAGE (nA)
1.25
TJ = 125°C
100
1
0.75
0.5
–50
7
–25
0
25
50
75
TJ = 100°C
10
0
100
0
5
10
15
20
25
TJ, JUNCTION TEMPERATURE (°C)
VDS, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
Figure 5. On–Resistance Variation with
Temperature
Figure 6. Drain–To–Source Leakage
Current versus Voltage
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NIMD6302R2
POWER MOSFET SWITCHING
Switching behavior is most easily modeled and predicted
by recognizing that the power MOSFET is charge
controlled. The lengths of various switching intervals (t)
are determined by how fast the FET input capacitance can
be charged by current from the generator.
The published capacitance data is difficult to use for
calculating rise and fall because drain–gate capacitance
varies greatly with applied voltage. Accordingly, gate
charge data is used. In most cases, a satisfactory estimate of
average input current (IG(AV)) can be made from a
rudimentary analysis of the drive circuit so that
t = Q/IG(AV)
The capacitance (Ciss) is read from the capacitance curve at
a voltage corresponding to the off–state condition when
calculating td(on) and is read at a voltage corresponding to the
on–state when calculating td(off).
At high switching speeds, parasitic circuit elements
complicate the analysis. The inductance of the MOSFET
source lead, inside the package and in the circuit wiring
which is common to both the drain and gate current paths,
produces a voltage at the source which reduces the gate drive
current. The voltage is determined by Ldi/dt, but since di/dt
is a function of drain current, the mathematical solution is
complex. The MOSFET output capacitance also
complicates the mathematics. And finally, MOSFETs have
finite internal gate resistance which effectively adds to the
resistance of the driving source, but the internal resistance
is difficult to measure and, consequently, is not specified.
The resistive switching time variation versus gate
resistance (Figure 9) shows how typical switching
performance is affected by the parasitic circuit elements. If
the parasitics were not present, the slope of the curves would
maintain a value of unity regardless of the switching speed.
The circuit used to obtain the data is constructed to minimize
common inductance in the drain and gate circuit loops and
is believed readily achievable with board mounted
components. Most power electronic loads are inductive; the
data in the figure is taken with a resistive load, which
approximates an optimally snubbed inductive load. Power
MOSFETs may be safely operated into an inductive load;
however, snubbing reduces switching losses.
During the rise and fall time interval when switching a
resistive load, VGS remains virtually constant at a level
known as the plateau voltage, VSGP. Therefore, rise and fall
times may be approximated by the following:
tr = Q2 x RG/(VGG – VGSP)
tf = Q2 x RG/VGSP
where
VGG = the gate drive voltage, which varies from zero to VGG
RG = the gate drive resistance
and Q2 and VGSP are read from the gate charge curve.
During the turn–on and turn–off delay times, gate current is
not constant. The simplest calculation uses appropriate
values from the capacitance curves in a standard equation for
voltage change in an RC network. The equations are:
td(on) = RG Ciss In [VGG/(VGG – VGSP)]
td(off) = RG Ciss In (VGG/VGSP)
800
VGS = 0 V
VDS = 0 V
TJ = 25°C
C, CAPACITANCE (pF)
Ciss
600
400
Crss
Ciss
200
Coss
0
–10
Crss
–5
0
VGS
5
10
15
20
25
VDS
GATE–TO–SOURCE OR DRAIN–TO–SOURCE VOLTAGE (VOLTS)
Figure 7. Capacitance Variation
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12
VDS, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
35
QT
10
25
8
VGS
20
6
15
4
ID = 3 A
TJ = 25°C
0
1
2
3
100
tf
td(off)
tr
10
td(on)
10
Q2
2
0
VDD = 30 V
ID = 5 A
VGS = 10 V
30
VDS
Q1
1000
t, TIME (ns)
VGS, GATE–TO–SOURCE VOLTAGE (VOLTS)
NIMD6302R2
4
5
5
0
6
QG, TOTAL GATE CHARGE (nC)
1
1
10
100
RG, GATE RESISTANCE ()
Figure 8. Gate–To–Source and Drain–To–Source
Voltage versus Total Charge
Figure 9. Resistive Switching Time
Variation versus Gate Resistance
DRAIN–TO–SOURCE DIODE CHARACTERISTICS
high di/dts. The diode’s negative di/dt during ta is directly
controlled by the device clearing the stored charge.
However, the positive di/dt during tb is an uncontrollable
diode characteristic and is usually the culprit that induces
current ringing. Therefore, when comparing diodes, the
ratio of tb/ta serves as a good indicator of recovery
abruptness and thus gives a comparative estimate of
probable noise generated. A ratio of 1 is considered ideal and
values less than 0.5 are considered snappy.
Compared to ON Semiconductor standard cell density
low voltage MOSFETs, high cell density MOSFET diodes
are faster (shorter trr), have less stored charge and a softer
reverse recovery characteristic. The softness advantage of
the high cell density diode means they can be forced through
reverse recovery at a higher di/dt than a standard cell
MOSFET diode without increasing the current ringing or the
noise generated. In addition, power dissipation incurred
from switching the diode will be less due to the shorter
recovery time and lower switching losses.
The switching characteristics of a MOSFET body diode
are very important in systems using it as a freewheeling or
commutating diode. Of particular interest are the reverse
recovery characteristics which play a major role in
determining switching losses, radiated noise, EMI and RFI.
System switching losses are largely due to the nature of
the body diode itself. The body diode is a minority carrier
device, therefore it has a finite reverse recovery time, trr, due
to the storage of minority carrier charge, QRR, as shown in
the typical reverse recovery wave form of Figure 14. It is this
stored charge that, when cleared from the diode, passes
through a potential and defines an energy loss. Obviously,
repeatedly forcing the diode through reverse recovery
further increases switching losses. Therefore, one would
like a diode with short trr and low QRR specifications to
minimize these losses.
The abruptness of diode reverse recovery effects the
amount of radiated noise, voltage spikes, and current
ringing. The mechanisms at work are finite irremovable
circuit parasitic inductances and capacitances acted upon by
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NIMD6302R2
IS, SOURCE CURRENT (AMPS)
3.5
3
VGS = 0 V
TJ = 25°C
2.5
2
1.5
1
0.5
0
4.00E–01
6.00E–01
8.00E–01
1.00E+00
VSD, SOURCE–TO–DRAIN VOLTAGE (VOLTS)
Figure 10. Diode Forward Voltage versus Current
SAFE OPERATING AREA
total power averaged over a complete switching cycle must
not exceed (TJ(MAX) – TC)/(RJC).
A power MOSFET designated E–FET can be safely used
in switching circuits with unclamped inductive loads. For
reliable operation, the stored energy from circuit inductance
dissipated in the transistor while in avalanche must be less
than the rated limit and must be adjusted for operating
conditions differing from those specified. Although industry
practice is to rate in terms of energy, avalanche energy
capability is not a constant. The energy rating decreases
non–linearly with an increase of peak current in avalanche
and peak junction temperature.
ID, DRAIN CURRENT (AMPS)
100
Mounted on 2″ sq. FR4 board (1″ sq. 2 oz. Cu 0.06″
thick single sided) with one die operating, 10s max.
10
10 s
1
0.1
0.01
0.1
VGS = 10 V
SINGLE PULSE
TC = 25°C
100 s
1 ms
10 ms
RDS(on) LIMIT
THERMAL LIMIT
PACKAGE LIMIT
1
dc
10
100
EAS, SINGLE PULSE DRAIN–TO–SOURCE
AVALANCHE ENERGY (mJ)
The Forward Biased Safe Operating Area curves define
the maximum simultaneous drain–to–source voltage and
drain current that a transistor can handle safely when it is
forward biased. Curves are based upon maximum peak
junction temperature and a case temperature (TC) of 25°C.
Peak repetitive pulsed power limits are determined by using
the thermal response data in conjunction with the procedures
discussed in AN569, “Transient Thermal Resistance –
General Data and Its Use.”
Switching between the off–state and the on–state may
traverse any load line provided neither rated peak current
(IDM) nor rated voltage (VDSS) is exceeded, and that the
transition time (tr, tf) does not exceed 10 s. In addition the
300
ID = 15 A
250
200
150
100
50
0
25
VDS, DRAIN–TO–SOURCE VOLTAGE (VOLTS)
50
75
100
125
150
TJ, STARTING JUNCTION TEMPERATURE (°C)
Figure 11. Maximum Rated Forward Biased
Safe Operating Area
Figure 12. Maximum Avalanche Energy versus
Starting Junction Temperature
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NIMD6302R2
TYPICAL ELECTRICAL CHARACTERISTICS
RJA(t), EFFECTIVE TRANSIENT
THERMAL RESPONSE
1
D = 0.5
0.2
0.1
0.1
0.05
0.02
0.01
0.01
1.0E–03
Normalized to RJA at Steady State (1″ pad)
SINGLE PULSE
1.0E–02
1.0E–01
1.0E+00
1.0E+01
t, TIME (s)
Figure 13. FET Thermal Response
di/dt
IS
trr
ta
tb
TIME
0.25 IS
tp
IS
Figure 14. Diode Reverse Recovery Waveform
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1.0E+02
1.0E+03
NIMD6302R2
INFORMATION FOR USING THE SO–8 SURFACE MOUNT PACKAGE
MINIMUM RECOMMENDED FOOTPRINT FOR SURFACE MOUNTED APPLICATIONS
Surface mount board layout is a critical portion of the total
design. The footprint for the semiconductor packages must
be the correct size to ensure proper solder connection
interface between the board and the package. With the
correct pad geometry, the packages will self–align when
subjected to a solder reflow process.
0.060
1.52
0.275
7.0
0.155
4.0
0.024
0.6
0.050
1.270
inches
mm
SO–8 POWER DISSIPATION
The power dissipation of the SO–8 is a function of the
input pad size. This can vary from the minimum pad size
for soldering to the pad size given for maximum power
dissipation. Power dissipation for a surface mount device is
determined by TJ(max), the maximum rated junction
temperature of the die, RJA, the thermal resistance from
the device junction to ambient; and the operating
temperature, TA. Using the values provided on the data
sheet for the SO–8 package, PD can be calculated as
follows:
PD =
into the equation for an ambient temperature TA of 25°C,
one can calculate the power dissipation of the device which
in this case is 2.0 Watts.
PD =
150°C – 25°C
= 2.0 Watts
62.5°C/W
The 62.5°C/W for the SO–8 package assumes the
recommended footprint on a glass epoxy printed circuit
board to achieve a power dissipation of 2.0 Watts using the
footprint shown. Another alternative would be to use a
ceramic substrate or an aluminum core board such as
Thermal Clad. Using board material such as Thermal
Clad, the power dissipation can be doubled using the same
footprint.
TJ(max) – TA
RJA
The values for the equation are found in the maximum
ratings table on the data sheet. Substituting these values
SOLDERING PRECAUTIONS
• The soldering temperature and time shall not exceed
260°C for more than 10 seconds.
• When shifting from preheating to soldering, the
maximum temperature gradient shall be 5°C or less.
• After soldering has been completed, the device should
be allowed to cool naturally for at least three minutes.
Gradual cooling should be used as the use of forced
cooling will increase the temperature gradient and
result in latent failure due to mechanical stress.
• Mechanical stress or shock should not be applied
during cooling.
The melting temperature of solder is higher than the rated
temperature of the device. When the entire device is heated
to a high temperature, failure to complete soldering within
a short time could result in device failure. Therefore, the
following items should always be observed in order to
minimize the thermal stress to which the devices are
subjected.
• Always preheat the device.
• The delta temperature between the preheat and
soldering should be 100°C or less.*
• When preheating and soldering, the temperature of the
leads and the case must not exceed the maximum
temperature ratings as shown on the data sheet. When
using infrared heating with the reflow soldering
method, the difference shall be a maximum of 10°C.
* * Soldering a device without preheating can cause
excessive thermal shock and stress which can result in
damage to the device.
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NIMD6302R2
TYPICAL SOLDER HEATING PROFILE
temperature versus time. The line on the graph shows the
actual temperature that might be experienced on the surface
of a test board at or near a central solder joint. The two
profiles are based on a high density and a low density
board. The Vitronics SMD310 convection/infrared reflow
soldering system was used to generate this profile. The type
of solder used was 62/36/2 Tin Lead Silver with a melting
point between 177–189°C. When this type of furnace is
used for solder reflow work, the circuit boards and solder
joints tend to heat first. The components on the board are
then heated by conduction. The circuit board, because it has
a large surface area, absorbs the thermal energy more
efficiently, then distributes this energy to the components.
Because of this effect, the main body of a component may
be up to 30 degrees cooler than the adjacent solder joints.
For any given circuit board, there will be a group of
control settings that will give the desired heat pattern. The
operator must set temperatures for several heating zones
and a figure for belt speed. Taken together, these control
settings make up a heating “profile” for that particular
circuit board. On machines controlled by a computer, the
computer remembers these profiles from one operating
session to the next. Figure 15 shows a typical heating
profile for use when soldering a surface mount device to a
printed circuit board. This profile will vary among
soldering systems, but it is a good starting point. Factors
that can affect the profile include the type of soldering
system in use, density and types of components on the
board, type of solder used, and the type of board or
substrate material being used. This profile shows
STEP 1
PREHEAT
ZONE 1
“RAMP”
200°C
STEP 2
STEP 3
VENT
HEATING
“SOAK” ZONES 2 & 5
“RAMP”
DESIRED CURVE FOR HIGH
MASS ASSEMBLIES
STEP 4
HEATING
ZONES 3 & 6
“SOAK”
160°C
STEP 5
STEP 6
STEP 7
HEATING
VENT
COOLING
ZONES 4 & 7
205° TO 219°C
“SPIKE”
PEAK AT
170°C
SOLDER
JOINT
150°C
150°C
100°C
140°C
100°C
SOLDER IS LIQUID FOR
40 TO 80 SECONDS
(DEPENDING ON
MASS OF ASSEMBLY)
DESIRED CURVE FOR LOW
MASS ASSEMBLIES
5°C
TIME (3 TO 7 MINUTES TOTAL)
TMAX
Figure 15. Typical Solder Heating Profile
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NIMD6302R2
PACKAGE DIMENSIONS
SO–8
CASE 751–07
ISSUE AA
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL IN
EXCESS OF THE D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6. 751-01 THRU 751-06 ARE OBSOLETE. NEW
STANDAARD IS 751-07
–X–
A
8
5
0.25 (0.010)
S
B
1
M
Y
M
4
K
–Y–
G
C
N
X 45 SEATING
PLANE
–Z–
0.10 (0.004)
H
D
0.25 (0.010)
M
Z Y
S
X
M
S
J
DIM
A
B
C
D
G
H
J
K
M
N
S
MILLIMETERS
MIN
MAX
4.80
5.00
3.80
4.00
1.35
1.75
0.33
0.51
1.27 BSC
0.10
0.25
0.19
0.25
0.40
1.27
0
8
0.25
0.50
5.80
6.20
STYLE 19:
PIN 1.
2.
3.
4.
5.
6.
7.
8.
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11
SOURCE 1
GATE 1
SOURCE 2
GATE 2
DRAIN 2
MIRROR 2
DRAIN 1
MIRROR 1
INCHES
MIN
MAX
0.189
0.197
0.150
0.157
0.053
0.069
0.013
0.020
0.050 BSC
0.004
0.010
0.007
0.010
0.016
0.050
0
8
0.010
0.020
0.228
0.244
NIMD6302R2
HDTMOS is a registered trademarks of Semiconductor Components Industries, LLC (SCILLC).
Thermal Clad is a registered trademark of the Bergquist Company.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make
changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any
particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all
liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
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12
NIMD6302R2/D