UC2879NG4 [TI]
PHASE SHIFT RESONANT CONTROLLER; 移相谐振控制器
| 型号： | UC2879NG4 |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | PHASE SHIFT RESONANT CONTROLLER |
| 文件： | 总15页 (文件大小：459K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UC1879
UC2879
UC3879
www.ti.com
SLUS230B–JUNE 1998–REVISED JUNE 2007
PHASE SHIFT RESONANT CONTROLLER
FEATURES
DESCRIPTION
•
•
•
Programmable Output Turn On Delay; Zero
Delay Available
The UC3879 controls a bridge power stage by phase
shifting the switching of one half-bridge with respect
to the other. This allows constant frequency pulse
width modulation in combination with resonant,
Compatible with Voltage Mode or Current
Mode Topologies
zero-voltage
switching
for
high
efficiency
Practical Operation at Switching Frequencies
to 300 kHz
performance. The UC3879 can be configured to
provide control in either voltage mode or current
mode operation, with overcurrent shutdown for fast
fault protection.
•
•
•
•
•
10-MHz Error Amplifier
Pin Programmable Undervoltage Lockout
Low Startup Current – 150 µA
Soft Start Control
Independently programmable time delays provide
dead-time at the turn-on of each output stage,
allowing time for each resonant switching interval.
Outputs Active Low During UVLO
BLOCK DIAGRAM
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 © 1998–2007, 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.
UC1879
UC2879
UC3879
www.ti.com
SLUS230B–JUNE 1998–REVISED JUNE 2007
DESCRIPTION (CONTINUED)
With the oscillator capable of operating in excess of 600 kHz, overall output switching frequencies to 300 kHz
are practical. In addition to the standard free running mode, with the CLKSYNC pin, the user may configure the
UC3879 to accept an external clock synchronization signal. Alternatively, up to three units can be locked
together with the operational frequency determined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protection. Additional features include a
10-MHz error amplifier, a 5-V precision reference, and soft start. The UC3879 is available in 20 pin N, J, DW,
and Q and 28 pin L packages.
ABSOLUTE MAXIMUM RATINGS(1)
PARAMETER
VALUE
20
UNIT
Supply voltage (VC, VIN)
V
Output current, source or sink, dc
20
mA
V
Output current, source, sink peak for 0.1 µs at max frequency of 300
kHz
100
Analog inputs
(Pins 1, 2, 3, 4, 5, 6, 14, 15, 17, 18, 19)
(Pin 16)
–0.3 to 5.3
–0.03 to VIN
Analog outputs
(Pins 7, 8, 12, 13)
–0.3 to VC to 0.3
V
Storage temperature range
Junction temperature
Lead temperature (soldering, 10 sec)
–65°C to 150°C
–55°C to 150°C
300°C
°C
(1) Pin references are to 20-pin DIL and SOIC packages. All voltages are with respect to ground unless otherwise stated. Currents are
positive into, negative out of the specified terminal.
THERMAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PACKAGE
J-20
θJA
70-85
80(2)
θJC
28(1)
35
N-20
DW-20 SOIC
PLCC-20
CLCC-20
45-95(2)
43-75(2)
N/A
25
34
5-8(2)(3)
(1) θJC data values stated were derived from MIL-STD-1835B. MIL-STD-1835B states "The baseline values shown are worst case (mean
+2s) for a 60 x 60 mil microcircuit device silicon die and aplicable for devices with die sizes up to 14400 square mils. For devices die
sizes greater than 14400 square mils use the following values; dual-in-line, 11°C/W; flat pacl 10°C/W; pin grid array, 10°C/W".
(2) Specified θJA (junction-to-ambient) is for devices mounted to 5-in2 FR4 PC board with one ounce copper wire where noted. When
resistance range is given, lower values are for 5-in2 aluminum PC board. Test PWB was 0.062 in thick and typically used 0.635-mm
trace widths for power packages and 1.3-mm trace widths for non-power packages with a 100 x 100 mil probe land area at the end of
each trace.
(3) θJC estimated for backside of device, through the metalized thermal conduction pads.
2
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UC1879
UC2879
UC3879
www.ti.com
SLUS230B–JUNE 1998–REVISED JUNE 2007
Product Selection Guide
TEMPERATURE RANGE
–55°C to 125°C
–40°C to 85°C
AVAILABLE PACKAGES
J, L
UCC1879
UCC2879
UCC3879
N, DW, Q, J, L
N, DW, Q
0°C to 70°C
DIL-20, SOIC-2
J OR N PACKAGE, DW PACKAGE
(TOP VIEW)
CLCC-28
L PACKAGE
(TOP VIEW)
DELSETA-B
CT
VREF
COMP
EA–
20 GND
1
2
3
4
5
6
7
8
9
UVSEL
CLKSYNC
N/C
19 RAMP
18 RT
N/C
N/C
CS
17 CLKSYNC
16 UVSEL
15 DELSETA-B
14 CT
6
7
8
9
10 11
OUTC
OUTB
PWRGND
VIN
4
3
2
RT
DELSETC-D
SS
RAMP
GND
N/C
13
14
15
16
17
18
1
OUTD
OUTC
VC
VC
28
27
N/C
13 OUTA
OUTC
OUTD
VREF
COMP
25 24 23 22 21 20
12 OUTB
11 PWRGND
VIN 10
N/C
N/C
SS
EA–
CS
PLCC-20
Q PACKAGE
(TOP VIEW)
N/C
DELSETC-D
DELSETC-D
SS
CS
OUTD
EA–
3
2
1
20 19
18
OUTC
VC
4
5
6
7
8
COMP
VREF
GND
RAMP
RT
17
16
15
14
VIN
PWRGND
OUTB
9
10 11 12 13
OUTA
CT
CLKSYNC
UVSEL
DELSETA-B
3
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UC1879
UC2879
UC3879
www.ti.com
SLUS230B–JUNE 1998–REVISED JUNE 2007
ELECTRICAL CHARACTERISTICS
Unless specified; VC = VIN = VUVSEL = 12 V, CT = 470 pF, RT = 9.53k, RDELSETA-B = RDELSEC-D = 4.8k, CDELSETA-B = CDELSETC-D
= 0.01 µF, TA = TJ.
PARAMETER
Undervoltage Lockout
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VUVSEL = VIN
9
12.5
1.15
5.2
10.75
15.25
1.75
6
12.5
16.5
2.15
7.4
Start threshold
VUVSEL = Open
VUVSEL = VIN
V
UVLO hysteresis
VUVSEL = Open
VUVSEL= VIN = 8 V
Input bias, UVSEL pin
30
µA
Supply Current
VIN = VUVSEL = 8 V, VC = 18 V,
IDELSETA-B = IDELSETC-D = 0
IVIN startup
IVC startup
150
10
600
100
µA
VIN = VUVSEL = 8 V, VC = 18 V,
IDELSETA-B = IDELSETC-D = 0
UC3879, UC2879
UC1879
23
23
4
35
36
8
IVIN operating
mA
IVC operating
Voltage Reference
Output voltage
TJ = 25°C
4.92
4.875
2.4
5
1
5
5.08
10
V
Line regulation
Load regulation
Total variation
11 V < VIN < 18 V
IVREF = –10 mA
mV
20
Line, Load, Temperature
VREF = 0 V, TJ = 25°C
5.125
–15
V
Short circuit current
Error Amplifier
Error amplifier input voltage
Input bias current
AVOL
–60
mA
2.5
0.6
90
2.6
3
V
µA
1 V < VCOMP < 4 V
11 V < VIN < 18 V
VCOMP = 1 V
60
85
1
dB
PSRR
100
2.5
–1.3
4.7
0.5
11
Output sink current
Output source current
Output voltage high
Output voltage low
Slew rate
mA
VCOMP = 4 V
–0.5
5
ICOMP = –0.5 mA
ICOMP = 1 mA
TA = 25°C
4
0
6
V
1
V/µs
4
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UC2879
UC3879
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SLUS230B–JUNE 1998–REVISED JUNE 2007
ELECTRICAL CHARACTERISTICS (continued)
Unless specified; VC = VIN = VUVSEL = 12 V, CT = 470 pF, RT = 9.53k, RDELSETA-B = RDELSEC-D = 4.8k, CDELSETA-B = CDELSETC-D
= 0.01 µF, TA = TJ.
PARAMETER
PWM Comparator
TEST CONDITIONS
MIN
TYP
MAX
UNIT
RAMP offset voltage
TJ = 25°C(1)
1.1
98%
0%
1.25
99.7%
0.3%
10
1.4
102%
2%
V
VCOMP> VRAMPpeak+ VRAMPoffset
VCOMP < Zero Phase Shift Voltage
VCOMP> VRAMPpeak + VRAMPoffset
VCOMP < Zero Phase Shift Voltage
UC3879, UC2879
PWM phase shift,
TDELSETA-B, TDELSETC-D = 0(2)
Output skew,
TDELSETA-B, TDELSETC-D = 0(2)
10
ns
115
250
300
Ramp to output delay,
TDELSETA-B = 0, TDELSETC-D = 0
UC1879
115
Oscillator
Initial accuracy
Voltage stability
TA = 25°C
180
200
1
220
2
kHz
%
11 V < VIN < 18 V
Line, Temperature
Total variation
160
2.3
2.8
0.5
200
2.5
4
240
2.7
kHz
CLKSYNC threshold
Clock out high
V
Clock out low
1
1.5
600
0.4
3.2
Clock out pulse width
Ramp valley voltage
Ramp peak voltage
Current Limit
400
0.2
2.9
ns
V
2.8
Input bias
VCS = 3 V
2
2.5
10
2.65
300
µA
V
Threshold voltage
Delay to OUTA, B, C, D
Cycle-by-Cycle Current Limit
Input bias
2.35
160
ns
VCS = 2.2 V
2
2
10
2.15
300
µA
V
Threshold voltage
Delay to output zero phase
1.85
110
ns
(1) Ramp offset voltage has a temperature coefficient of about –4 mV/°C.
200
q =
f%
T
(2) Phase shift percentage (0% = 0 , 100% = 180 ) is defined as
where is the phase shift, and and T are defined in Figure 1. At 0% phase shift, is the output skew.
5
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UC1879
UC2879
UC3879
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SLUS230B–JUNE 1998–REVISED JUNE 2007
ELECTRICAL CHARACTERISTICS (continued)
Unless specified; VC = VIN = VUVSEL = 12 V, CT = 470 pF, RT = 9.53k, RDELSETA-B = RDELSEC-D = 4.8k, CDELSETA-B = CDELSETC-D
= 0.01 µF, TA = TJ.
PARAMETER
Soft Start/Reset Delay
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Charge current
Discharge current
Restart threshold
Discharge level
Output Drivers
Output Low level
Output High level
VSS = 0.5 V
VSS = 1 V
–20
120
4.3
–9
230
4.7
–3
µA
V
300
mV
IOUT = 10 mA
0.3
2.2
0.4
3
V
IOUT = –10 mA, Referenced to VC
(3)
Delay Set
Delay time(4)
Delay time(4)
Zero delay(5)
RDELSETA-B = RDELSETC-D = 4.8k
RDELSETA-B = RDELSETC-D = 1.9k
VDELSETA-B = VDELSETC-D = 5 V
250
100
370
155
5
520
220
ns
(3) Delay time can be programmed via resistors from the delay set pins to ground.
-10
Delay Time = 0.89 ·10
(
·R sec
DELAY
)
The recommended range for RDELAY is 1.9 kΩ to 10 kΩ.
(4) Delay time is defined as:
æ 1
ç
ö
÷
ø
delay = T ·
- duty cycle
2
è
where T is defined in Figure 1.
(5) The zero phase shift voltage is the voltage measured at COMP which forces zero phase shift. This condition corresponds to zero
effective output power. Zero phase shift voltage has a temperature coefficient of about –2 mV/°C.
t
DutyCycle =
T
Period = T
T
(Ato C) = T (BtoD) =
DHL
DHL
Figure 1. Phase Shift, Output Skew and Delay Time Definitions
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UC1879
UC2879
UC3879
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SLUS230B–JUNE 1998–REVISED JUNE 2007
PIN DESCRIPTIONS
CLKSYNC (Bi-directional Clock and Synchronization): Used as an output, CLKSYNC provides a clock signal. As
an input, this pin provides a synchronization point. Multiple UC3879s, each with their own local oscillator
frequency, may be connected together by the CLKSYNC pin, and they will synchronize to the fastest oscillator.
This pin may also be used to synchronize the UC3879 to an external clock, provided the frequency of the
external signal is higher than the frequency of the local oscillator. CLKSYNC is internally connected to an emitter
follower pull-up and a current source pull-down (300 µA typical). Therefore, an external resistor to GND can be
used to improve the CLKSYNC pin’s ability to drive capacitive loads.
COMP (Error Amplifier Output): This pin is the output of the gain stage for overall feedback control. Error
amplifier output voltage levels below 0.9 V forces zero phase shift. Since the error amplifier has a relatively low
current drive capability, the output may be overridden by driving it with a sufficiently low impedance source.
CT (Oscillator Frequency Set): After choosing RT to set the required upper end of the linear duty cycle range,
the timing capacitor (CT) value is calculated to set the oscillator frequency as follows:
Dlin
CT =
1.08 ·RT · f
Connect the timing capacitor directly between CT and GND. Use a high quality ceramic capacitor with low ESL
and ESR for best results. A minimum CT value of 200 pF insures good accuracy and less susceptibility to circuit
layout parasitics. The oscillator and PWM are designed to provide practical operation to 600 kHz.
CS (Current Sense): This pin is the non-inverting input to the two current fault comparators whose references
are set internally to fixed values of 2 V and 2.5 V. When the voltage at this pin exceeds 2 V, and the error
amplifier output voltage exceeds the voltage on the ramp input, the phase shift limiting overcurrent comparator
will limit the phase shifting on a cycle-by-cycle basis. When the voltage at this pin exceeds 2.5 V, the current
fault latch is set, the outputs are forced OFF, and a soft start cycle is initiated. If a constant voltage above 2.5 V
is applied to this pin the outputs are disabled and held low. When CS is brought below 2.5 V, the outputs will
begin switching at 0 degrees phase shift before the SS pin begins to rise. This condition will not prematurely
deliver power to the load.
DELSETA-B, DELSETC-D (Output Delay Control): The user programmed currents from these pins to GND set
the turn on delay for the corresponding output pair. This delay is introduced between the turn off of one switch
and the turn on of another in the same leg of the bridge to allow resonant switching to take place. Separate
delays are provided for the two half-bridges to accommodate differences in the resonant capacitor charging
currents.
EA– (Error Amplifier Inverting Input): This is normally connected to the voltage divider resistors which sense the
power supply output voltage level. The loop compensation components are connected between this pin and
COMP.
GND (Signal Ground): All voltages are measured with respect to GND. The timing capacitor on CT, and bypass
capacitors on VREF and VIN should be connected directly to the ground plane near GND.
OUTA – OUTD (Outputs A-D): The outputs are 100-mA totem pole output drivers optimized to drive FET driver
devices. The outputs operate as pairs with a nominal 50% duty cycle. The A-B pair is intended to drive one
half-bridge in the external power stage and is synchronized to the clock waveform. The C-D pair drives the other
half-bridge with switching phase shifted with respect to the A-B outputs.
PWRGND (Power Ground): VC should be bypassed with a ceramic capacitor from VC to the section of the
ground plane that is connected to PWRGND. Any required bulk reservoir capacitor should be connected in
parallel. PWRGND and GND should be connected at a single point near the chip to optimize noise rejection and
minimize DC voltage drops.
RAMP (Voltage Ramp): This pin is the input to the PWM comparator. Connect it to CT for voltage mode control.
For current mode control, connect RAMP to CS and also to the output of the current sense transformer circuit.
Slope compensation can be achieved by injecting a portion of the ramp voltage from CT to RAMP.
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UC2879
UC3879
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SLUS230B–JUNE 1998–REVISED JUNE 2007
PIN DESCRIPTIONS (continued)
RT (Clock/Sync Duty Cycle Set Pin): The UC3879 oscillator produces a sawtooth waveform. The rising edge is
generated by connecting a resistor from RT to GND and a capacitor from CT to GND (see CT pin description).
During the rising edge, the modulator has linear control of the duty cycle. The duty cycle jumps to 100% when
the voltage on COMP exceeds the oscillator peak voltage. Selection of RT should be done first, based on the
required upper end of the linear duty cycle range (Dlin) as follows:
2.5
RT =
10mA · 1- Dlin
(
)
Recommended values for RT range from 2.5 kΩ to 100 kΩ.
SS: Connect a capacitor between this pin and GND to set the soft start time. The voltage at SS will remain near
zero volts as long as VIN is below the UVLO threshold. Soft start will be pulled up to about 4.8 V by an internal
9-µA current source when VIN and VREF become valid (assuming a non-fault condition). In the event of a
current fault (CS voltage exceeding 2.5 V), soft start will be pulled to GND and then ramp to 4.8 V. If a fault
occurs during the soft start cycle, the outputs will be immediately disabled and soft start must fully charge prior
to resetting the fault latch. For paralleled controllers, the soft start pins may be paralleled to a single capacitor,
but the charge currents will be additive.
UVSEL: Connecting this pin to VIN sets a turn on voltage of 10.75 V with 1.5 V of UVLO hysteresis. Leaving the
pin open-circuited programs a turn on voltage of 15.25 V with 6 V of hysteresis.
VC (Output Switch Supply Voltage): This pin supplies power to the output drivers and their associated bias
circuitry. The difference between the output high drive and VC is typically 2.1 V. This supply should be bypassed
directly to PWRGND with a low ESR/ESL capacitor.
VIN (Primary Chip Supply Voltage): This pin supplies power to the logic and analog circuitry on the integrated
circuit that is not directly associated with driving the output stages. Connect VIN to a stable source above 12 V
for normal operation. To ensure proper functionality, the UC3879 is inactive until VIN exceeds the upper
undervoltage lockout threshold. This pin should be bypassed directly to GND with a low ESR/ESL capacitor.
NOTE:
When VIN exceeds the UVLO threshold the supply current (IIN) jumps from about 100
A to greater than 20 mA. If the UC3879 is not connected to a well bypassed supply, it
may immediately enter the UVLO state again. Therefore, sufficient bypass capacity
must be added to ensure reliable startup.
VREF: This pin provides an accurate 5 V voltage reference. It is internally short circuit current limited. VREF is
disabled while VIN is below the UVLO threshold. The circuit is also disabled until VREF reaches approximately
4.75 V. For best results bypass VREF with a 0.1 µF, low ESR/ESL capacitor.
ADDITIONAL INFORMATION
Please refer to the following Unitrode publications for additional information. The following three topics are
available in the Applications Handbook.
1. Application Note U-154, The New UC3879 Phase- Shifted PWM Controller Simplifies the Design of Zero
Voltage Transition Full-Bridge Converters, by Laszlo Balogh.
2. Application Note U-136, Phase Shifted, Zero Voltage Transition Design Considerations and the UC3875
PWM Controller, by Bill Andreycak.
3. Design Note DN-63, The Current-Doubler Rectifier: An Alternative Rectification Technique for Push-Pull
and Bridge Converters, by Laszlo Balogh.
8
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PACKAGE OPTION ADDENDUM
www.ti.com
24-Jan-2013
PACKAGING INFORMATION
Orderable Device
Status Package Type Package Pins Package Qty
Eco Plan Lead/Ball Finish
MSL Peak Temp
Op Temp (°C)
Top-Side Markings
Samples
Drawing
(1)
(2)
(3)
(4)
UC1879J
UC1879J883B
UC2879DW
OBSOLETE
OBSOLETE
ACTIVE
CDIP
CDIP
SOIC
J
J
20
20
20
TBD
TBD
Call TI
Call TI
Call TI
Call TI
-55 to 125
-55 to 125
-40 to 85
DW
25
25
Green (RoHS
& no Sb/Br)
CU NIPDAU
Level-2-260C-1 YEAR
UC2879DW
UC2879DW
UC2879DW
UC2879DW
UC2879DWG4
UC2879DWTR
ACTIVE
ACTIVE
ACTIVE
SOIC
SOIC
SOIC
DW
DW
DW
20
20
20
Green (RoHS
& no Sb/Br)
CU NIPDAU
CU NIPDAU
CU NIPDAU
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
-40 to 85
-40 to 85
-40 to 85
2000
2000
Green (RoHS
& no Sb/Br)
UC2879DWTRG4
Green (RoHS
& no Sb/Br)
UC2879J
UC2879N
OBSOLETE
ACTIVE
CDIP
PDIP
J
20
20
TBD
Call TI
Call TI
-40 to 85
-40 to 85
N
20
20
Green (RoHS
& no Sb/Br)
CU NIPDAU
N / A for Pkg Type
UC2879N
UC2879NG4
UC3879DW
ACTIVE
ACTIVE
ACTIVE
ACTIVE
ACTIVE
PDIP
SOIC
SOIC
SOIC
SOIC
N
20
20
20
20
20
Green (RoHS
& no Sb/Br)
CU NIPDAU
CU NIPDAU
CU NIPDAU
CU NIPDAU
CU NIPDAU
N / A for Pkg Type
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
Level-2-260C-1 YEAR
-40 to 85
0 to 70
0 to 70
0 to 70
0 to 70
UC2879N
DW
DW
DW
DW
25
Green (RoHS
& no Sb/Br)
UC3879DW
UC3879DW
UC3879DW
UC3879DW
UC3879DWG4
UC3879DWTR
UC3879DWTRG4
25
Green (RoHS
& no Sb/Br)
2000
2000
Green (RoHS
& no Sb/Br)
Green (RoHS
& no Sb/Br)
UC3879J
UC3879N
OBSOLETE
ACTIVE
CDIP
PDIP
J
20
20
TBD
Call TI
Call TI
0 to 70
0 to 70
N
20
20
Green (RoHS
& no Sb/Br)
CU NIPDAU
N / A for Pkg Type
UC3879N
UC3879N
UC3879NG4
ACTIVE
PDIP
N
20
Green (RoHS
& no Sb/Br)
CU NIPDAU
N / A for Pkg Type
0 to 70
(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.
Addendum-Page 1
PACKAGE OPTION ADDENDUM
www.ti.com
24-Jan-2013
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) Only one of markings shown within the brackets will appear on the physical device.
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
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
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.
OTHER QUALIFIED VERSIONS OF UC1879, UC3879 :
Catalog: UC3879
•
Military: UC1879
•
NOTE: Qualified Version Definitions:
Catalog - TI's standard catalog product
•
Military - QML certified for Military and Defense Applications
•
Addendum-Page 2
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