User's Guide
SNVA446B – June 2010 – Revised February 2014
AN-2067 LM5027A Evaluation Board
1
Introduction
The LM5027A evaluation board is designed to provide the design engineer with a fully functional power
converter based on the Active Clamp Forward topology to evaluate the LM5027A controller. The
evaluation board is provided in an industry standard quarter-brick footprint.
The performance of the evaluation board is:
• Input Operating Range: 36 to 78 V (100 V peak)
• Output Voltage: 3.3 V
• Output Current: 0 to 30 A
• Measured Efficiency: 90.5% @ 30 A, 92.5% @ 15 A
• Frequency of Operation: 250 kHz
• Board Size: 2.3 × 1.45 × 0.5 inches
• Load Regulation: 1%
• Line Regulation: 0.1%
• Line UVLO, Hiccup Current Limit
• A 70% Maximum Duty Cycle
The printed circuit board consists of 6 layers of 2 ounce copper on FR4 material with a total thickness of
0.050 inches. The unit is designed for continuous operation at rated load at 2V
0.4V < UVLO < 2V
UVLO
5V
SS
~3V
1V
OUTA, OUTB
Soft-Start
2.5V
4.5V
5V
4.5V
2.5V
2V
SSSR
OUTSR
Soft-Start
OUTSR
Soft-Stop
Figure 7. LM5027A Soft-Start Waveforms
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
7
Secondary Side Soft-Start
8
www.ti.com
Secondary Side Soft-Start
In a typical DC-DC converter with a 3.3 V output the voltage reference for the error amplifier is 1.2 V. Prior
to the power supply being turned-on and if there is a pre-bias load, the secondary side soft-start capacitor
(CSS) will be pre-charged to the voltage reference level of 1.2 V (if the pre-bias load > 1.2 V), refer to
Figure 8. On start-up the primary side soft-start begins and the output voltage rises from the pre-bias
voltage level to 3.3 V, refer to Figure 9. At the end of the primary side soft-start period the controller will be
at maximum duty cycle and the output voltage will overshoot until the feedback error amplifier has a
chance to respond and reduce the output voltage to the regulation set point.
+VOUT
+SB
+SB
Feedback
Optocoupler
Error Amplifier
+
CSS
Figure 8. VREF with Pre-Bias Load
Figure 9. Pre-Bias Secondary Side Soft-Start
8
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Secondary Side Soft-Start Reset
www.ti.com
9
Secondary Side Soft-Start Reset
When input power is supplied to the LM5027A Evaluation Board the LM5027A’s internal VCC Regulator
turns-on providing power to the VCC pin, the primary side soft-start voltage increases, and the output
drives are enabled. When the drive outputs are enables the voltage on the transformer secondary
increases, the Secondary Bias rises supplying voltage to the reference and error amplifier, refer to
Figure 10. During this time FET Q1 is turned-on holding the reference voltage at the positive input to the
error amplifier low (zero volts). When the voltage on the secondary bias capacitor (CBIAS) rises above the
Zener diode> 3.6 V, the Secondary Bias Power Good (the collector of Q2) goes high. This turns-off FET
Q1 allowing the secondary soft-start capacitor to charge up. This solution of reseting the soft-start
capacitor to zero (0 V) on start-up works for pre-bias loads as well as loads that do not need to start into a
pre-biased condition. This allows for a monotonic start-up under both operating modes.
Converter Ouput (Vout)
Frequency
24.9k
Compensation
15k
Reference
Secondary Bias
Secondary Bias
Power Good
Opto-Coupler
Feedback
Voltage
Error
Amplifier
DOG
NOTES
5k
3.6V
47k
Soft-Start
3.6V
47k
20k
C BIAS
1 uF
Q2
LM4041-1.2
47k
0.1 uF
To Forward/
MOSFET
enable
Q1
1000 pF
Figure 10. Pre-Bias Schematic
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
9
Pre-Bias Load-Synchronous Forward MOSFET Enabled
10
www.ti.com
Pre-Bias Load-Synchronous Forward MOSFET Enabled
The self driven synchronous rectification topology has an issues starting into a pre-bias load. When a prebias load is connected across the power supply output, refer to Figure 11, the pre-bias source will conduct
current through the output inductor and the self driven gate drive resistors R1 and R2. If the pre-bias
voltage is greater than the Vgs of the synchronous MOSFET (M1), the MOSFET will be turned-on sinking
current into the power supply.
T1
R1
Gate of the Sync
MOSFET needs to be
isolated
M1
R2
OUTSR
Figure 11. Self Driven with Pre-Bias Load
10
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Synchronous Forward MOSFET Enabled
www.ti.com
11
Synchronous Forward MOSFET Enabled
For the LM5027A Evaluation board we used the Secondary Bias Power Good signal as a flag to indicate
that the primary sides MOSFETs are switching providing power to the secondary of the transformer T1.
When the flag goes high this indicates that it is time to turn-on the forward conducting MOSFET M1. The
Secondary Bias Power Good signal drives the base of an NPN transistor (Q3), refer to Figure 13. The
NPN transistor is configured as a Cascod amplifier; when it is turned-on, the voltage on the secondary of
the transformer T1 drives the gate of the synchronous MOSFET, M1. The MOSFET gate drive voltage is:
V-GATE_DRIVE_M1 = V_Secondary_Bias_Power_Good - VBE_Q3
(1)
An NPN transistor needs to be selected so that the transistors collector to emitter voltage under the worst
case operating condition does not exceed it’s VCE ratings, and that the collector current (Icc) can handle
the maximum peak current to drive the gate of MOSFET M1. For the LM5027A Evaluation board the
transistor is a 30 V, 1.5 ampere transistor. The maximum VCE is:
VCE =
Vin_max 100
= 16.67 Vpk
=
n
6
(2)
Where:
Vin = 100 V under transient conditions
n is the transformer turns ratio = 6
A diode D1 is connected from the collector to the emitter of Q3 to handle any voltage spikes as a result of
circuit inductance. Without this diode inductive voltage spike may damage the Cascod amplifier Q3.
An NPN transistor was use instead of an N-Channel MOSFET because the Vgs drop, typically 4 to 5 V;
this would reduce the gates drive voltage to M1. Under minimum input line conditions M1 may not be fully
turned-on and there would be an increase in the I2 × RDS(ON) losses.
Figure 12 shows the start-up waveforms for the Evaluation board. After the input power is supplied to the
Evaluation board the secondary bias voltage rises, when the secondary bias is greater than 3.6 V, the
Secondary Power Good output goes high. This turns-on M1 and enables the secondary side soft-start
circuit allowing the output voltage to increase after Vout > Vpre-bias.
An alternative to using the circuit in Figure 13 is shown in Figure 14; an additional winding can be added
to the power transformer which can be used to drive the Forward Synchronous Rectifier MOSFET (M1).
This is a simple solution and should not add a lot of complexity to the transformer design.
Figure 12. Pre-Bias Load Waveforms
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
11
Synchronous Forward MOSFET Enabled
www.ti.com
Secondary Bias
Q1
Secondary Bias Power Good
Peak Rectifier
3.6V
CBIAS
T1
D1
Q3
M1
Gate of the Sync
MOSFET needs to be
isolated
OUTSR
+
Figure 13. Isolated Synchronous MOSFET
12
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Synchronous Forward MOSFET Enabled
www.ti.com
T1
Gate of the Sync MOSFET is
Drven by a winging on T1 and is
isolated
OUTSR
Figure 14. Isolated Synchronous MOSFET Drive Using a Transformer
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
13
Pre-Bias Load Test Set-Up
12
www.ti.com
Pre-Bias Load Test Set-Up
For the Pre-bias start-up test, the circuit in Figure 15 was used. An external bias supply, through a 1.0 Ω
resistor, was connected across the output terminals of the Evaluation Board.
Current
probe
1:
Vout
+
80 Volt, 5 Amp
Power Supply
with
Current Meter
+
S+
LM5027
Evaluation Board
IN
220uF
+
-
-
OSC
scope
Vout - 0.6 V
SVoutRTN
Figure 15. Pre-Bias Load Test Set-Up
13
Pre-Bias Load Start-Up Requirements
The Evaluation board Pre-Bias start-up requirement is that during converter start-up the output shall rise
monotonically and not sink current (into the converter) of more than 50 mA .
14
Evaluation Board Results
Figure 16 shows the output of the Evaluation Board starting with a pre-bias voltage of 2.7 V. Under these
conditions the output voltage starts at 2.7 V and then increases monotonically to 3.3 V. The current into
the Evaluation board (sinking) is less than 50 mA. When the output voltage rise above the pre-bias voltage
there is approximately 400 mA of current out of (sourced) the Evaluation Board to charge the external 220
µF capacitor. After the external capacitor is charge to 3.3 V the current out of the power supply drop to
approximately 50 mA.
Figure 16. Pre-Bias StartUp
14
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Performance Characteristics
www.ti.com
15
Performance Characteristics
15.1 Turn-On Waveforms
When applying power to the LM5027A evaluation board a certain sequence of events occurs. Soft-start
capacitor values and other components allow for a minimal output voltage for a short time until the
feedback loop can stabilize without overshoot. Figure 17 shows the output voltage during a typical start-up
with a 48 V input and a load of 5 A. There is no overshoot during startup.
(1)
Conditions:
Input Voltage = 48 VDC
Output Current = 5 A
Trace 1: Volts/div = 1.0 V
Output Voltage
Horizontal Resolution = 1 ms/div
Figure 17. Turn-On Waveforms
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
15
Performance Characteristics
www.ti.com
15.2 Transient Response Waveforms
Figure 18 shows the transient response for a load of change from 2 A to 25 A. The lower trace shows
minimal output voltage droop and overshoot during the sudden change in output current shown by the
upper trace.
(1)
Conditions:
Input Voltage = 48 VDC
Output Current = 2 A to 25 A
Trace1: Volts/div = 0.2 V
Output Voltage
Trace 2: Amps/Div = 5.0 A
Output Current
Horizontal Resolution = 1 ms/div
Figure 18. Transient Response Waveforms
15.3 Output Ripple Waveforms
Figure 19 shows typical output ripple seen directly across the output capacitor, for an input voltage of 48 V
and a load of 30 A. This waveform is typical of most loads and input voltages.
(1)
Conditions:
Input Voltage = 48 VDC
Output Current = 30 A
Bandwidth Limit = 25 MHz
Trace 1: Volts/div = 50 mV
Output Voltage
Horizontal Resolution = 2 µs/div
Figure 19. Output Ripple Waveform
16
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Performance Characteristics
www.ti.com
15.4 Drain Voltage of Q1 with a 25 A Load
Figure 20 and Figure 21 show the drain voltage of Q1 with a 25 A load. Figure 20 represents an input
voltage of 38 V and Figure 21 represents an input voltage of 78 V.
(1)
Conditions:
Input Voltage = 38 VDC
Output Current = 25 A
Trace 1: Volts/Div = 20 V
Q1 Drain Voltage
Horizontal Resolution = 1 µs/div
Figure 20. Drain Voltage of Q1 with a 25 A Load - Input Voltage of 38 V
(1)
Conditions:
Input Voltage = 78 VDC
Trace 1: Volts/Div = 20 V
Q1 Drain Voltage
Horizontal Resolution = 1 µs/div
Figure 21. Drain Voltage of Q1 with a 25 A Load - Input Voltage of 78 V
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
17
Performance Characteristics
www.ti.com
15.5 Gate Voltages
Figure 22 shows the gate voltages of the synchronous rectifiers. The drive from the main power
transformer is delayed slightly at turn-on by a resistor interacting with the gate capacitance. This provides
improved switching transitions for optimum efficiency. The difference in drive voltage is inherent in the
topology and varies with line voltage
(1)
Conditions:
Input Voltage = 48 VDC
Output Current = 5 A
Trace 3: (gate) Volts/Div = 2 V
Synchronous Rectifier, Q3/Q4
Trace 2: (gate) Volts/Div = 2 V
Synchronous Rectifier, Q5/Q6
Horizontal Resolution = 1 µs/div
Figure 22. Gate Voltages
15.6 Efficiency
Figure 23. Efficiency
18
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Performance Characteristics
www.ti.com
Bill of Materials
Part Number
Description
Value
C
Item
1
C4532X7R2A225M
CAPACITOR, CER, TDK
2.2 µ, 100 V
C
2
C4532X7R2A225M
CAPACITOR, CER, TDK
2.2 µ, 100 V
C
3
C4532X7R2A225M
CAPACITOR, CER, TDK
2.2 µ, 100 V
C
4
C4532X7R2A225M
CAPACITOR, CER, TDK
2.2 v, 100 V
C
5
APXE4R0ARA681MH80G
CAPACITOR, CER, United Chemi-Con
680 µ, 4 V
C
6
C1210C476M8PACTU
CAPACITOR,CER,KEMET
47 µ, 10 V
C
7
C1210C476M8PACTU
CAPACITOR,CER,KEMET
47 µ, 10 V
C
8
C0603C471J5GAC
CAPACITOR, CER, KEMET
470 p, 50 V
C
9
C0603C103K3RAC
CAPACITOR, CER, KEMET
0.01 µ, 25 V
C
10
C0603C223K3RAC
CAPACITOR, CER, KEMET
0.022 µ, 25 V
C
11
C0603C473K3RAC
CAPACITOR, CER, KEMET
0.047 µ, 25 V
C
12
C1608X7R1H104K
CAPACITOR, CER, TDK
0.1 µ, 50 V
C
13
C0603C101J5GAC
CAPACITOR, CER, KEMET
100 p, 50 V
C
14
C0603C104K3RAC
CAPACITOR, CER, KEMET
0.1 µ, 25 V
C
15
C3216X7R2E104K
CAPACITOR, CER, TDK
0.1 µ, 250 V
C
16
C1608X7R1H104K
CAPACITOR, CER, TDK
0.1 µ, 50 V
C
17
C1210C476M8PACTU
CAPACITOR, CER, TDK
47 µ, 10 V
C
18
C1210C476M8PACTU
CAPACITOR, CER, TDK
47 µ, 10 V
C
19
C0603C221J3GAC
CAPACITOR, CER, KEMET
220 p, 25 V
C
20
OPEN
C
21
C3216X7R2E104K
CAPACITOR, CER, TDK
0.1 µ, 250 V
C
22
C1608X7R1H104K
CAPACITOR, CER, KEMET
0.1 µ, 25 V
C
23
C0603C103K3RAC
CAPACITOR, CER, KEMET
0.01 µ, 25 V
C
24
C0603C473K3RAC
CAPACITOR, CER, KEMET
0.047 µ, 25 V
C
25
C0603C473K3RAC
CAPACITOR, CER, KEMET
0.047 µ, 25 V
C
26
C4532X7R3D222K
CAPACITOR, CER, TDK
2200 p, 2000 V
C
27
GRM188R61E105KA12D
CAPACITOR, CER, MURATA
1.0 µ, 25 V
C
28
C0603C224K3RAC
CAPACITOR, CER, TDK
0.22 µ, 25 V
C
29
C0603C102K3RAC
CAPACITOR, CER, KEMET
1000 p, 25 V
C
30
C0603C102K3RAC
CAPACITOR, CER, KEMET
1000 p, 25 V
C
31
C0805C471J5GAC
CAPACITOR, CER, KEMET
470 p, 50 V
C
32
C0805C471F5GAC
CAPACITOR, CER, KEMET
470 p, 50 V
C
33
C2012X7R2A332K
CAPACITOR, CER, TDK
3300 p, 100 V
C
34
OPEN
C
71
C4532X7R1E156M
CAPACITOR, CER, TDK
15 µ, 25 V
C
35
C0603C102K3RAC
CAPACITOR, CER, KEMET
1000 p, 25 V
C
36
GRM188R61E105KA12D
CAPACITOR, CER, MURATA
1.0 u, 25 V
D
1
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
2
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
3
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
4
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
5
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
6
CMD2836
DIODE, DUAL SIGNAL, CENTRAL
120 V, 200 mA
D
7
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
8
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
D
9
ZHCS350
DIODE, SIGNAL, ZETEX
40 V, 500 mA
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
19
Performance Characteristics
Item
20
www.ti.com
Part Number
Description
Value
J
1
3104-2-00-01-00-00-08-0
PIN, BRICK, 0.040D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
2
3104-2-00-01-00-00-08-0
PIN, BRICK, 0.040D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
4
3104-2-00-01-00-00-08-0
PIN, BRICK, 0.040D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
5
3231-2-00-01-00-00-08-0
PIN, BRICK, 0.080D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
6
3104-2-00-01-00-00-08-0
PIN, BRICK, 0.040D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
8
3104-2-00-01-00-00-08-0
PIN, BRICK, 0.040D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
J
9
3231-2-00-01-00-00-08-0
PIN, BRICK, 0.080D, MILL-MAX
MOUNT ON SOLDER
SIDE OF PCB
L
1
SRU1048-6R8Y
INPUT CHOKE, Bourns
6.8 uH, 4.8 Arms
L
2
7443556130
CHOKE, WURTH
1.2 µH, 37 A
L
3
SDR0503-332JL
CHOKE, Bourns
3.3 mH, 0.045 A
Q
1
SI7846DP
N-FET, SILICONIX
150 V, 50 m
Q
2
SI3475
P-FET, IR
200 V, 1.6
Q
3
SI7866DP
FET, SILICONIX
20 V, 3 m
Q
4
SI7866DP
FET, SILICONIX
20 V, 3 m
Q
5
SI7866DP
FET, SILICONIX
20 V, 3 m
Q
6
SI7866DP
FET, SILICONIX
20 V, 3 m
Q
7
MMBT2907A
Bipolar, PNP, 60 V, 600 mA
Q
8
QSX6
Bipolar, NPN, 30 V, 1.5 A
ROHM
60 V 280 mA
Q
9
2N7002VA
FET, N_Channel, Fairchild
Q
10
MMBT2907A
Bipolar, PNP, 60 V, 600 mA
R
1
CRCW120610R0F
RESISTOR
10
R
2
CRCW08059093F
RESISTOR
90.9 k
R
3
CRCW06032002F
RESISTOR
20 k
R
4
CRCW06034992F
RESISTOR
49.9 k
R
5
CRCW06034991F
RESISTOR
4.99 k
R
6
CRCW08059093F
RESISTOR
90.9 K
R
7
CRCW06031001F
RESISTOR
1K
R
8
CRCW06036191F
RESISTOR
6.19 K
R
9
CRCW06035R60F
RESISTOR
5.6
R
10
CRCW060352302F
RESISTOR
52.3 K
R
11
CRCW06032002F
RESISTOR
20 K
R
12
CRCW06031001F
RESISTOR
1K
R
13
CRCW06035R60F
RESISTOR
5.6
R
14
CRCW120649R9F
RESISTOR
49.9
R
15
CRCW06036R34F
RESISTOR
6.34
R
16
OPEN
R
17
CRCW06032200F
RESISTOR
220
R
18
CRCW06031002F
RESISTOR
10 k
R
19
CRCW06034R70F
RESISTOR
4.7
R
20
SHORT (0 Ω)
RESISTOR, 0 Ω
0Ω
R
21
CRCW06031001F
RESISTOR
1K
R
22
CRCW06032000F
RESISTOR
200
R
23
CRCW06031002F
RESISTOR
10 k
R
24
CRCW06031502F
RESISTOR
15 k
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Performance Characteristics
www.ti.com
Item
Part Number
Description
Value
R
25
CRCW06032492F
RESISTOR
24.9 k
R
26
CRCW060310R0F
RESISTOR
10
R
27
CRCW060310R0F
RESISTOR
10
R
28
CRCW06031001F
RESISTOR
1k
R
29
CRCW06032002F
RESISTOR
20.0 k
R
30
CRCW06031002F
RESISTOR
10.0 k
R
31
CRCW06034990F
RESISTOR
499
R
32
OPEN
R
33
SHORT (0 Ω)
RESISTOR, 0 Ω
0Ω
R
34
CRCW1218110ROFKEK
RESISTOR
10, 1 W
R
35
CRCW1218110ROFKEK
RESISTOR
10, 1 W
R
36
CRCW06031001F
RESISTOR
1k
R
37
CRCW06033011F
RESISTOR
3.01 k
R
38
CRCW06034990F
RESISTOR
499
R
39
CRCW06034702F
RESISTOR
47 k
R
40
CRCW06034702F
RESISTOR
47 k
R
41
CRCW06034702F
RESISTOR
47 k
10 k
R
42
CRCW06031002F
RESISTOR
R
T1
NTCG164BH103H
NTC, 10k@25°C, 1k@100°C, TDK
10 k
T
1
HA4000-Al
POWER XFMR W/AUX, COILCRAFT
12:2
T
2
DA2319-ALB
Gate Drive, Coilcraft
T
3
P8208T, Pulse
CURRENT XFR, PULSE ENG
U
1
LM5027
CONTROLLER, TEXAS INSTRUMENTS
U
2
PS2811-1M
OPTO-COUPLER, NEC
U
3
LM8261
OPAMP, TEXAS INSTRUMENTS
U
4
LM4040
REFERENCE, TEXAS INSTRUMENTS
U
5
LM4041
REFERENCE, TEXAS INSTRUMENTS
Z
2
MM5Z3V6
DIODE, ZENER 3.6 V
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
100:1
Fairchild
AN-2067 LM5027A Evaluation Board
21
Printed Circuit Layout
16
www.ti.com
Printed Circuit Layout
Figure 24. Top Assembly Layer
Figure 25. Bottom Layer
22
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Printed Circuit Layout
www.ti.com
Figure 26. Bottom Silk Layer
Figure 27. Mid 1 Layer
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
23
Printed Circuit Layout
www.ti.com
Figure 28. Mid 2 Layer
Figure 29. Mid 3 Layer
24
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Printed Circuit Layout
www.ti.com
Figure 30. Mid 4 Layer
Figure 31. Bottom Assembly Layer
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
AN-2067 LM5027A Evaluation Board
25
Printed Circuit Layout
www.ti.com
Figure 32. Top Layer
Figure 33. Top Silk Layer
26
AN-2067 LM5027A Evaluation Board
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
Application Schematic
www.ti.com
17
Application Schematic
Figure 34. Application Schematic: Input 36-76, Voutput 6.3 A, 30 A
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
AN-2067 LM5027A Evaluation Board
Copyright © 2010–2014, Texas Instruments Incorporated
27
Revision History
www.ti.com
Revision History
Changes from A Revision (May 2013) to B Revision ...................................................................................................... Page
•
Changed Top Layer Assy to Bottom Assy, since Top was in twice.
.............................................................
22
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
28
Revision History
SNVA446B – June 2010 – Revised February 2014
Submit Documentation Feedback
Copyright © 2010–2014, Texas Instruments Incorporated
STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES
1.
Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or
documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein.
Acceptance of the EVM is expressly subject to the following terms and conditions.
1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software
1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.
2
Limited Warranty and Related Remedies/Disclaimers:
2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software
License Agreement.
2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment
by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any
way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or
instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as
mandated by government requirements. TI does not test all parameters of each EVM.
2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,
or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the
warranty period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to
repair or replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall
be warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.
3
Regulatory Notices:
3.1 United States
3.1.1
Notice applicable to EVMs not FCC-Approved:
This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit
to determine whether to incorporate such items in a finished product and software developers to write software applications for
use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless
all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause
harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is
designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of
an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
3.1.2
For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:
CAUTION
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.
FCC Interference Statement for Class A EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
FCC Interference Statement for Class B EVM devices
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:
•
•
•
•
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
3.2 Canada
3.2.1
For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210
Concerning EVMs Including Radio Transmitters:
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.
Concernant les EVMs avec appareils radio:
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.
Concerning EVMs Including Detachable Antennas:
Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
for use with this device.
Concernant les EVMs avec antennes détachables
Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur
3.3 Japan
3.3.1
Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
輸入される評価用キット、ボードについては、次のところをご覧ください。
http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page
3.3.2
Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
by TI as conforming to Technical Regulations of Radio Law of Japan.
If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of
Japan to follow the instructions below with respect to EVMs:
1.
2.
3.
Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,
Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or
Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
SPACER
SPACER
SPACER
SPACER
SPACER
【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて
いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの
措置を取っていただく必要がありますのでご注意ください。
1.
2.
3.
電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
いただく。
実験局の免許を取得後ご使用いただく。
技術基準適合証明を取得後ご使用いただく。
なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ
ンスツルメンツ株式会社
東京都新宿区西新宿６丁目２４番１号
西新宿三井ビル
3.3.3
Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ
い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
SPACER
4
EVM Use Restrictions and Warnings:
4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT
LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
related to, for example, temperatures and voltages.
4.3 Safety-Related Warnings and Restrictions:
4.3.1
User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any
load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.
During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit
components may have elevated case temperatures. These components include but are not limited to linear regulators,
switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
information in the associated documentation. When working with the EVM, please be aware that the EVM may become
very warm.
4.3.2
EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
designees.
4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
requirements.
5.
Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
accurate, complete, reliable, current, or error-free.
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
SPACER
6.
Disclaimers:
6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE
DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.
6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND
CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
THE EVM.
7.
USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.
8.
Limitations on Damages and Liability:
8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,
LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL
BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.
8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION
ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.
9.
Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
excluding any postage or packaging costs.
10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
in any United States or foreign court.
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2015, Texas Instruments Incorporated
spacer
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
Products
Applications
Audio
www.ti.com/audio
Automotive and Transportation
www.ti.com/automotive
Amplifiers
amplifier.ti.com
Communications and Telecom
www.ti.com/communications
Data Converters
dataconverter.ti.com
Computers and Peripherals
www.ti.com/computers
DLP® Products
www.dlp.com
Consumer Electronics
www.ti.com/consumer-apps
DSP
dsp.ti.com
Energy and Lighting
www.ti.com/energy
Clocks and Timers
www.ti.com/clocks
Industrial
www.ti.com/industrial
Interface
interface.ti.com
Medical
www.ti.com/medical
Logic
logic.ti.com
Security
www.ti.com/security
Power Mgmt
power.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Microcontrollers
microcontroller.ti.com
Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
OMAP Applications Processors
www.ti.com/omap
TI E2E Community
e2e.ti.com
Wireless Connectivity
www.ti.com/wirelessconnectivity
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2015, Texas Instruments Incorporated
工商网监
湘ICP备2023018690号
