PTEA415050 Datasheet by Texas Instruments

I TEXAS INSTRUMENTS
L
O
A
D
SENSE (–)
SENSE (+)
PTEA415050N
52
7
Adjust
8
6
4
1
3
+VO
Sense(+)
−VO
Sense(−)
+VI
−VI
+VI
−VI
+VO
−VO
CI
(Optional)
CO
(Optional)
Remote
On/Off
Not Recommended for New Designs
PTEA415050
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SLTS291B –JULY 2008–REVISED NOVEMBER 2010
15-A, 48-V INPUT, 5-V OUTPUT, ISOLATED, 1/8th BRICK DC/DC CONVERTER
Check for Samples: PTEA415050
1FEATURES DESCRIPTION
• 15-A Output Current Rating The PTEA415050 power module is a 5-V, single-
• Input Voltage Range: 36 V to 75 V output, isolated DC/DC converter, housed in an
• 91% Efficiency industry standard one-eighth brick package. This
module is rated up to 75 W with a maximum load
• 1500 VDC Isolation current of 15 A.
• On/Off Control The PTEA415050 operates from a standard 48-V
• Overcurrent Protection telecom central office (CO) supply and occupies less
• Differential Remote Sense than 2.0 in2of PCB area. The modules offer OEMs a
• Adjustable Output Voltage compact and flexible high-output power source in an
industry standard footprint. They are suitable for
• Output Overvoltage Protection distributed power applications in both telecom and
• Over-Temperature Shutdown computing environments, and may be used for
• Undervoltage Lockout intermediate bus converter architectures.
• Standard 1/8-Brick Footprint Features include a remote On/Off control with
• UL Safety Agency Approval optional logic polarity, an undervoltage lockout
(UVLO), a differential remote sense, and an industry
standard output voltage adjustment using an external
resistor. Protection features include output
overcurrent protection (OCP), overvoltage protection
(OVP), and thermal shutdown (OTP).
The module is fully integrated for stand-alone
operation, and requires no additional components.
STANDARD APPLICATION
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Copyright © 2008–2010, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
l TEXAS INSTRUMENTS
Not Recommended for New Designs
PTEA415050
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
www.ti.com
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
ORDERING INFORMATION
For the most current package and ordering information, see the Package Option Addendum at the end of this datasheet, or see the TI
website at www.ti.com.
Table 1. PART NUMBERING SCHEME
Input Output Output Voltage Enable Electrical Options Pin Style
Voltage Current
PTEA 4 15 050 N 2 A D
4 = 48 V 15 = 15A 050 = 5 V N = Negative 2 = VOAdjust D = Through-hole, Pb-free
P = Positive
ABSOLUTE MAXIMUM RATING
UNIT
TAOperating Temperature Over VIRange –40°C to 85°C(1)
Range
VI, MAX Continuous voltage 75 V
Maximum Input Voltage Peak voltage for 100 ms duration 100 V
PO, MAX Maximum Output Power 75 W
TSStorage Temperature –40°C to 125°C
Per Mil-STD-883, Method 2002.3 1 ms, AD Suffix 250 G
Mechanical Shock 1/2 Sine, mounted
Per Mil-STD-883, Method 2007.2 20- AD Suffix 15 G
Mechanical Vibrarion 2000 Hz, PCB mounted
Weight 18 grams
Flammability Meets UL 94V-O
(1) See SOA curves or consult factory for appropriate derating.
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ELECTRICAL CHARACTERISTICS PTEA415050
(Unless otherwise stated, TA=25°C, VI= 48 V, VO= 5 V, CO= 0 μF, and IO= IOmax)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
IOOutput Current Over VIrange 0 15 A
VIInput Voltage Range Over IORange 35 48 75 V
VOtol ±1(1) %VO
Set Point Voltage Tolerance 4.95 5 5.05 V
Regtemp Temperature Variation –40°C >TA> 85°C ±91 %VO
Regline Line Regulation Over VIrange ±1 mV
Regload Load Regulation Over IOrange ±1 mV
ΔVotot Total Output Voltage Variation Includes set-point, line, load, –40°C >TA> 85°C ±1.5 ±3 %VO
ΔVADJ Output Adjust Range PO≤75 W –20 10 %VO
ηEfficiency IO= IOmax 91%
VRVORipple (pk-pk) 20 MHz bandwidth 40 mVpp
ttr 0.1 A/μs slew rate, 50% to 75% IOmax 100 μs
Transient Response
ΔVtr VOover/undershoot 200 mV
ITRIP Overcurrent Threshold Shutdown, followed by auto-recovery 19 A
OVP Output Overvoltage Protection Output shutdown and latch off 120 %VO
OTP Over Temperature Protection Temperature Measurement at thermal sensor. Hysteresis 115 ° C
= 10°C nominal.
fsSwitching Frequency Over VIrange 290 kHz
VOFF VIdecreasing, IO= 5 A 29.4
UVLO Undervoltage Lockout V
VHYS Hysteresis 3.3
On/Off Input: Negative Enable
VIH Input High Voltage 2.4 Open(2)
Referenced to –VIV
VIL Input Low Voltage –0.2 0.8
IIL Input Low Current –0.2 mA
On/Off Input: Positive Enable
VIH Input High Voltage 4.5 Open(2)
Referenced to –VIV
VIL Input Low Voltage –0.2 0.8
IIL Input Low Current –0.2 mA
IISB Standby Input Current Output disabled (pin 2 status set to Off) 0.5 mA
CIExternal Input Capacitance Between +VIand –VI0 100 μF
Between +VOand –VO0 1000 μF
COExternal Output Capacitance Equivalent Series Resistance 10 mΩ
Isolation Voltage Input-to-output and input-to-case 1500 Vdc
Isolation Capacitance Input-to-output 1200 pF
Isolation Resistance Input-to-output 10 MΩ
(1) If Sense(–) is not used, pin 5 must be connected to pin 4 for optimum output voltage accuracy.
(2) The Remote On/Off input has an internal pull-up and may be controlled with an open collector (or open drain) interface. An open circuit
correlates to a logic high. Consult the application notes for interface considerations.
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Sense(+)
+VO
Adjust
Sense(−)
−VO
PTEA415050
(Top View)
+VI
On/Off
1
2
3−VI5
6
7
4
8
Not Recommended for New Designs
PTEA415050
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
www.ti.com
PIN DESCRIPTIONS
+VI:The positive input for the module with respect to –VI. When powering the module from a –48-V telecom
central office supply, this input is connected to the primary system ground.
–VI:The negative input supply for the module, and the 0 VDC reference for the Remote On/Off input. When
powering the module from a +48-V supply, this input is connected to the 48-V return.
Remote On/Off: This input controls the On/Off status of the output voltage. It is either driven low (–VIpotential),
or left open-circuit. For units identified with the NEN option, applying a logic low to this pin will enable the output.
And for units identified with the PEN option, the output will be disabled.
VOAdjust: Allows the output voltage to be trimmed by up or down between +10% and –20% of its nominal
value. The adjustment method uses a single external resistor. Connecting the resistor between VOAdjust and
–VOadjusts the output voltage lower, and placing it between VOAdjust and +VOadjusts the output higher. The
calculations for the resistance value follows industry standard formulas. For further information consult the
application note on output voltage adustment.
+VO:The positive power output with respect to –VO, which is DC isolated from the input supply pins. If a negative
output voltage is desired, +VOshould be connected to the secondary circuit common and the output taken from
–VO.
–VO:The negative power output with respect to +VO, which is DC isolated from the input supply pins. This output
is normally connected to the secondary circuit common when a positive output voltage is desired.
Sense(+): Provides the converter with an output sense capability to regulate the set-point voltage directly at the
load. When used with Sense(-), the regulation circuitry will compensate for voltage drop between the converter
and the load. The pin may be left open circuit, but connecting it to +VOwill improve load regulation. If a series
inductor is used for filtering between the module output and load, this pin must be connected directly to the
module output to ensure good control design stability.
Sense(–): Provides the converter with an output sense capability when used in conjunction with Sense(+) input.
For optimum output voltage accuracy this pin should always be connected to –VO.
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l TEXAS INSTRUMENTS
30
20
60
40
70
90
80
50
TA- Ambient Temperature - °C
VI= 48 V
300/400
200
100
LFM
Natural Convection
IO- Output Current - A
0 3 6 9 12 15
2
5
4
1
0
9
0 3 6 9 12 15
3
6
IO– Output Current – A
PD– Power Dissipation – W
60 V
48 V
36 V
VI
75 V
VI= 75 V
VI= 36 V
VI= 48 V
7
8
VI= 60 V
50
40
10
0
60
20
30
VO– Output Voltage Ripple – mVP-P
IO– Output Current – A
60 V
48 V
36 V
VI
75 V
0 3 6 9 12 15
60
80
70
50
100
90
0 3 6 9 12 15
IO– Output Current – A
h– Efficiency – %
VI= 75 V
VI= 48 V
VI= 60 V
VI= 36 V
60 V
48 V
36 V
VI
75 V
Not Recommended for New Designs
PTEA415050
www.ti.com
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
TYPICAL CHARACTERISTICS
PTEA415050, VO= 5 V (1) (2)
EFFICIENCY OUTPUT RIPPLE POWER DISSIPATION
vs vs vs
LOAD CURRENT LOAD CURRENT LOAD CURRENT
Figure 1. Figure 2. Figure 3.
AMBIENT TEMPERATURE
vs
LOAD CURRENT
Figure 4.
(1) All data listed in Figure 1,Figure 2, and Figure 3 have been developed from actual products tested at 25°C. This data is considered
typical data for the dc-dc converter.
(2) The temperature derating curves represent operating conditions at which internal components are at or below manufacturer's maximum
rated operating temperature. Derating limits apply to modules soldered directly to a 100–mm × 100–mm, double-sided PCB with 2 oz.
copper. For surface mount packages, multiple vias (plated through holes) are required to add thermal paths around the power pins.
Please refer to the mechanical specification for more information. Applies to Figure 4.
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PTEA415050
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
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APPLICATION INFORMATION
Operating Features and System Considerations for the PTEA415050 DC/DC Converter
Overcurrent Protection
To protect against load faults, these converters incorporate output overcurrent protection. Applying a load to the
output that exceeds the converter's overcurrent threshold (see applicable specification) will cause the output
voltage to momentarily fold back, and then shut down. Following shutdown the module will periodically attempt to
automatically recover by initiating a soft-start power-up. This is often described as a hiccup mode of operation,
whereby the module continues in the cycle of successive shutdown and power up until the load fault is removed.
Once the fault is removed, the converter automatically recovers and returns to normal operation.
Output Overvoltage Protection
Each converter incorporates protection circuitry that continually senses for an output overvoltage (OV) condition.
The OV threshold is set approximately 20% higher than the nominal output voltage. If the converter output
voltage exceeds this threshold, the converter is immediately shut down and remains in a latched-off state. To
resume normal operation the converter must be actively reset. This can only be done by momentarily removing
the input power to the converter. For fail-safe operation and redundancy, the OV protection uses circuitry that is
independent of the converter’s internal feedback loop.
Overtemperature Protection
Overtemperature protection is provided by an internal temperature sensor, which closely monitors the
temperature of the converter’s printed circuit board (PCB). If the sensor exceeds a temperature of approximately
115°C, the converter will shut down. The converter will then automatically restart when the sensed temperature
drops back to approximately 105°C. When operated outside its recommended thermal derating envelope (see
data sheet SOA curves), the converter will typcially cycle on and off at intervals from a few seconds to one or two
minutes. This is to ensure that the internal components are not permanently damaged from excessive thermal
stress.
Undervoltage Lockout
The Undervoltage lockout (UVLO) is designed to prevent the operation of the converter until the input voltage is
at the minimum input voltage. This prevents high start-up current during normal power-up of the converter, and
minimizes the current drain from the input source during low input voltage conditions. The UVLO circuitry also
overrides the operation of the Remote On/Off control.
Primary-Secondary Isolation
These converters incorporate electrical isolation between the input terminals (primary) and the output terminals
(secondary). All converters are production tested to a withstand voltage of 1500 VDC. This specification complies
with UL60950 and EN60950 requirements. This allows the converter to be configured for either a positive or
negative input voltage source. The data sheet Pin Descriptions section provides guidance as to the correct
reference that must be used for the external control signals.
Input Current Limiting
The converter is not internally fused. For safety and overall system protection, the maximum input current to the
converter must be limited. Active or passive current limiting can be used. Passive current limiting can be a fast
acting fuse. A 125-V fuse, rated no more than 10 A, is recommended. Active current limiting can be implemented
with a current limited Hot-Swap controller.
Thermal Considerations
Airflow may be necessary to ensure that the module can supply the desired load current in environments with
elevated ambient temperatures. The required airflow rate may be determined from the Safe Operating Area
(SOA) thermal derating chart (see typical characteristics).
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SLTS291B –JULY 2008–REVISED NOVEMBER 2010
Differential Remote Sense
The remote sense pins allows the converter to precisely regulate the DC output voltage at a remote location.
This might be a power plane on an inner layer of the host PCB. Connecting Sense(+) directly to +VO, and
Sense(–) to –VOwill improve output voltage accuracy. In the event that the sense pins are left open-circuit, an
internal 10-Ωresistor between each sense pin and its corresponding output prevents an excessive rise in the
output voltage. For practical reasons, the amount of IR voltage compensation should be limited to 0.5 V
maximum.
The remote sense feature is designed to compensate for limited amounts of IR voltage drop. It is not intended to
compensate for the forward drop of a non-linear or frequency dependent components that may be placed in
series with the converter output. Examples of such components include OR-ing diodes, filter inductors, ferrite
beads, and fuses. Enclosing these components with the remote sense connections effectively places them inside
the regulation control loop, which can affect the stability of the regulator.
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PTEA415050
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
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Using the Remote On/Off Function on the PTEA415050 DC/DC Converter
For applications requiring output voltage On/Off control, the PTEA415050 DC/DC converter incorporate a
Remote On/Off control (pin 2). This feature can be used to switch the module off without removing the applied
input source voltage. When placed in the Off state, the standby current drawn from the input source is typically
reduced to 3 mA.
Negative Output Enable (NEN)
Models using the negative enable option, the Remote On/Off (pin 2) control must be driven to a logic low voltage
for the converter to produce an output. This is accomplished by either permanently connecting pin 2 to –VI(pin
3), or driving it low with an external control signal. Table 2 shows the input requirements of pin 2 for those
modules with the NEN option.
Table 2. On/Off Control Requirements
for Negative Enable
PARAMETER MIN TYP MAX UNITS
VIH Disable 2.4 20 V
VIL Enable –0.2 0.8
Vo/c Open-Circuit 9 15
IIPin 2 at –VI–0.75 mA
Positive Output Enable (PEN)
For those models with the positive enable (PEN) option, leaving pin 2 open circuit, (or driving it to an equivalent
logic high voltage), will enable the converter output. This allows the module to produce an output voltage
whenever a valid input source voltage is applied to +VIwith respect to –VI. If a logic-low signal is then applied to
pin 2 the converter output is disabled. Table 3 gives the input requirements of pin 2 for modules with the PEN
option.
Table 3. On/Off Control Requirements
for Positive Enable
PARAMETER MIN TYP MAX UNITS
VIH Enable 4.5 20 V
VIL Disable –0.2 0.8
Vo/c Open-Circuit 5 7
IIPin 2 at –VI–0.5 mA
Notes:
1. The Remote On/Off control uses –VI(pin 3) as its ground reference. All voltages are with respect to –VI.
2. An open-collector device (preferably a discrete transistor) is recommended. A pull-up resistor is not required.
If one is added the pull-up voltage should not exceed 20 V.
Caution: Do not use a pull-resistor to +VI(pin 1). The remote On/Off control has a maximum input voltage of
20 V. Exceeding this voltage will overstress, and possibly damage, the converter.
3. The Remote On/Off pin may be controlled with devices that have a totem-pole output. This is provided the
output high level voltage (VOH) meets the module's minimum VIH specified in Table 2. If a TTL gate is used, a
pull-up resistor may be required to the logic supply voltage.
4. The converter incorporates an undervoltage lockout (UVLO). The UVLO keeps the converter off until the
input voltage is close to the minimum specified operating voltage. This is regardless of the state of the
Remote On/Off control. Consult the product specification for the UVLO input voltage thresholds.
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PTEA415050P
2 Remote On/Off
3–VI
1=Disable
–VI
Q1
BSS138
UDG-10013
Not Recommended for New Designs
PTEA415050
www.ti.com
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
Turn-On: With a valid input source voltage applied, the converter produces a regulated output voltage within
10 ms of the output being enabled. Figure 6 shows the output response of the PTEA following the removal of the
logic-low signal from the Remote On/Off (pin 2); see Figure 5. This corresponds to the rise in VEN in Figure 6.
Although the rise-time of the output voltage is short (<5 ms), the indicated delay time will vary depending upon
the input voltage and the module’s internal timing. The waveforms were measured with 48 VDC input voltage,
and a 15-A resistive load.
Figure 5. Recommended Remote On/Off Control Figure 6. Power Up
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l TEXAS INSTRUMENTS 51 1 1 .225 A% A% 100 A% A ‘ W E 5 of 7V J L 8 ummm
1
3
2
4
8
6
5
7
Sense(+)
Adjust
–VO
Remote
On/Off
PTEA415050N
Sense(–)
+VI
–VI
+VO
Sense(+)
(R1)
Adjust
Up
+
–VI
+VIL
O
A
D
+VO
Sense(–)
–VO
(R2)
Adjust
Down
UDG-10014
(R2) +5.11100
D%*10.22 (kW)
R1 +5.11 VO(100 )D%)
1.225 D%*511
D%*10.22 (kW)
Not Recommended for New Designs
PTEA415050
SLTS291B –JULY 2008–REVISED NOVEMBER 2010
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Adjusting the Output Voltage of the PTEA415050 Isolated DC/DC Converter
The output voltage adjustment of the PTEA415050 isolated DC/DC converter follows the standard adopted by
popular 1/8-brick DC/DC converters. Adjustment is accomplished with a single external resistor that can adjust
the output voltage from –20% to +10% of the nominal set-point voltage. The placement of the resistor determines
the direction of adjustment, up or down, and the value of the magnitude of adjustment. To ensure good VOset-
point accuracy, a 1% maximum tolerance resistor is recommended.
Adjust Up: To increase the output voltage add a resistor, R1, between VOAdjust (pin 6) and Sense(+) (pin 7).
Adjust Down: Add a resistor, (R2), between VOAdjust (pin 6) and Sense(–) (pin 5).
Refer to Figure 7 for the placement of the required resistor, R1 or (R2).
The values of R1 [adjust up], and (R2) [adjust down], can be calculated using the following formulas.
(1)
(2)
Where:
Δ% = Amount of adjustment in %
VO= Original set-point voltage
Notes:
1. Use a 1% resistor for either the R1 or (R2). Place the resistor as close to the converter as possible.
2. If VOis increased, the maximum load current must be derated according to the following equation.
where
• VOis the original set-point voltage
• VAis the adjusted output voltage (measured between pin 8 and pin 4) (3)
In any instance, the load current must not exceed the converter's maximum rated output current of 15 A.
3. The overvoltage threshold is fixed, and is set approximately 20% above the nominal output voltage. Adjusting
the output voltage higher reduces the voltage margin between the adjusted output voltage and the
overvoltage (OV) protection threshold. This could make the module sensitive to OV fault detection, as a
result of random noise and load transients.
Figure 7.
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Table 4. Adjustment Resistor Values
VO(nom) Adjusted Output Trim-Up RADJ Trim-Down RADJ
% Adjust (V) Voltage (V) R1 (kΩ) R2 (kΩ)
+10 5.50 169 Open
+ 9 5.45 187 Open
+ 8 5.40 205 Open
+ 7 5.35 237 Open
+ 6 5.30 274 Open
+ 5 5.25 324 Open
+ 4 5.20 402 Open
+ 3 5.15 536 Open
+ 2 5.10 806 Open
+ 1 5.05 1580 Open
0 5.00 Open Open
–1 4.95 Open 499
–2 4.90 Open 243
–3 4.85 Open 158
–4 4.80 Open 118
–5 4.75 Open 90.9
–6 4.70 Open 75.0
–7 4.65 Open 63.4
–8 4.60 Open 53.6
–9 4.55 Open 46.4
–10 4.50 Open 41.2
–11 4.45 Open 36.5
–12 4.40 Open 32.4
–13 4.35 Open 28.7
–14 4.30 Open 26.1
–15 4.25 Open 23.7
–16 4.20 Open 21.5
–17 4.15 Open 19.6
–18 4.10 Open 18.2
–19 4.05 Open 16.5
–20 4.00 Open 15.4
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PACKAGE OPTION ADDENDUM
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Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead/Ball Finish
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
PTEA415050N2AD NRND Through-
Hole Module EAW 8 15 RoHS (In Work)
& non-Green SN N / A for Pkg Type -40 to 85
PTEA415050P2AD NRND Through-
Hole Module EAW 8 15 RoHS (In Work)
& non-Green SN N / A for Pkg Type -40 to 85
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead/Ball Finish - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead/Ball Finish values may wrap to two lines if the finish
value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
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TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
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Addendum-Page 2
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