Texas Instruments TPS53124 User manual

User’s Guide
TPS53124 Buck Controller Evaluation Module User's
Guide
Table of Contents
1 Description.............................................................................................................................................................................. 2
2 Electrical Performance...........................................................................................................................................................2
3 Schematic................................................................................................................................................................................3
4 Test Setup and Results.......................................................................................................................................................... 4
5 Configuration.......................................................................................................................................................................... 5
6 EVM Assembly Drawing and PCB Layout............................................................................................................................ 6
7 List of Materials.....................................................................................................................................................................10
8 Reference...............................................................................................................................................................................11
9 Revision History....................................................................................................................................................................11
Trademarks
D-CAP™ is a trademark of Texas Instruments.
All trademarks are the property of their respective owners.
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1 Description
The TPS53124 is a dual, adaptive on-time D-CAP™ mode synchronous buck controller. The TPS53124 enables
system designers to cost-effectively complete the suite of DTV POL regulators and digital STB regulators with a
low external component count. The main control loop for the TPS53124 uses the D-CAP mode that is optimized
for low-ESR output capacitors such as POSCAP, SP-CAP, or high polymer chemistry and provides fast transient
response with no external compensation. The TPS53124 provides conversion voltages (drain voltage for the
synchronous high-side MOSFET) from 4.5 V to 24 V and output voltages from 0.76 V to 5.5 V.
The HPA332 (TPS53124EVM) evaluation module is a high-efficiency, dual synchronous buck converter providing
1.05 V at 4 A and 1.8 V at 4 A from 5-V to 22-V input. This user's guide describes the HPA332 performance.
2 Electrical Performance
Table 2-1. Electrical Performance
SPECIFICATIONS TEST CONDITIONS MIN TYP MAX UNIT
Input voltage range (VIN) 5 12 22 V
CH1
Output voltage 1.05 V
Operating frequency VIN = 12 V, Iout1 = 1 A 280 kHz
Output current 4 A
Overcurrent limit VIN = 12 V 5 A
Output ripple voltage VIN = 12 V, Iout1 = 4 A 29 mVp-p
CH2
Output voltage 1.8 V
Operating frequency VIN = 12 V, Iout2 = 1 A 360 kHz
Output current 4 A
Overcurrent limit VIN = 12 V 5 A
Output ripple voltage VIN = 12 V, Iout2 = 4 A 33 mVp-p
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3 Schematic
+
+
+
+
+
Figure 3-1. TPS53124 EVM Schematic Diagram
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4 Test Setup and Results
4.1 Test Setup
Connect the test equipment and HPA332 EVM board as shown in Figure 4-1.
HPA332
TPS53124EVM-001
+
-Electronic
Load2
Oscilloscope
CH2
Electronic
Load1
+
-
Oscilloscope
CH1
VO1
VO1_GND
VO2
VO2_GND
12V/6A
Power supply
VIN
_GND
VIN +-
DMM3
+
-
DMM2
+
-
DMM1
+
-
CN1
CN2 TP7
TP8
TP4
TP6
TP3
TP9
FAN
Figure 4-1. Equipment Setup for HPA332 EVM Board
4.2 Test Procedure
1. Make sure the switches SW1 (EN1) and SW2 (EN2) are in OFF position.
2. Apply appropriate VIN voltage to VIN and VIN_GND terminals.
3. Turn on SW1 (EN1), CH1-output will start up.
4. Turn on SW2 (EN2), CH2-output will start up.
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4.3 Start-Up Performance
EN1 (5 V/div)
VO1 (0.5 V/div)
Figure 4-2. 1.05-V Start-Up Waveforms
EN2 (5 V/div)
VO2 (0.5 V/div)
Figure 4-3. 1.8-V Start-Up Waveform
4.4 Transient Response
VO1 (100 mV/div)
Iout1 (2A/div)
Figure 4-4. 1.05-V Load Transient Response
VO2 (100 mV/div)
Iout2 (2A/div)
Figure 4-5. 1.8-V Load Transient Response
5 Configuration
This EVM can be set at desired configurations. Refer to the following specific setting configuration sections.
5.1 Bootstrap Diode Selection
Bootstrap diodes are not populated on this EVM since TPS53124 has them built-in. External Schottky diodes
can be added to improve efficiency.
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6 EVM Assembly Drawing and PCB Layout
J 2 J1
C N 1
1
U1
TP1
TP2
SW2
SW1
C6
R 13
C11
R 12
C5
C4
C3
C2
Q3
1
Q4 1
Q2
1
Q1 1
L2
L1
+ +
TP8
C10
C9
C7
C8
D1
TP5
C15
R 11
R 8
C1 6
C18 C17
C14 C13
D 2
TP4
TP6
TP3
+ +
TP7
TP11
TP9
J 3
R 10
R 7
C21
C2 0
R 2
C1 2
C1 9
R 6
R5
R1
R 15
R 3
R 4
TP10
C N 2
Figure 6-1. Top Assembly
EVM Assembly Drawing and PCB Layout www.ti.com
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R 9 R 14
+
C1
Figure 6-2. Bottom Assembly
Figure 6-3. Top Layer
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Figure 6-4. Inner Layer 1
Figure 6-5. Inner Layer 2
EVM Assembly Drawing and PCB Layout www.ti.com
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Figure 6-6. Bottom Layer
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7 List of Materials
Table 7-1. List of Materials
Ref Dsg QTY Description Size MFR Part Number
C1 0 Capacitor, Aluminum 0.26 × 0.26 inch Any Any
C8, C13 2 Capacitor, NPCAP, 330 μF, 4.0-V 15-mΩ , 20% 6.6 × 7.2 mm NIPPON
CHEMICON APXE4R0ARA331M
C15 1 Capacitor, Ceramic, 4.7 μF, 10-V, BJ, 20% 0805 TDK C2012JB1A475MN
C16 1 Capacitor, Ceramic, 1 μF, 16-V, BJ, 20% 0805 TDK C2012JB1C105M75MN
C2, C3, C4, C5 4 Capacitor, Ceramic, 10 μF, 25-V, BJ , 20% 1210 Taiyo Yuden TMK325BJ106MN
C6, C11 2 Capacitor, Ceramic, 0.1 μF, 50-V, BJ, 20% 0603 Std Std
C7,C14 0 not mount 6,6 × 7.2 mm Any Any
C9, C10,
C17,C18 0 not mount 1206 Any Any
C12 ,C19–C21 0 not mount 0603 Any Any
CN1, CN2 0 Adaptor, 3,5-mm probe clip ( or 131-5031-00) 0.2 Tektronix 131-4244-001
D1, D2 0 Diode, Schottky, 1-A, 30-V SMA Any Any
J1, J2, J3 3 Terminal Block, 2-pin, 15-A, 5,1mm 0.40 × 0.35 inch Phoenix
Contact MKDSN1.5/2-5.08
L1, L2 2 Inductor, 3.3 μH, 6.0 A, 29.7 mΩ 6,5 × 7.1 mm TDK SPM6530T-3R3M
Q1, Q3 2 MOSFET, N-ch, 30-V, 6.5-A, 38-mΩ SO8 ROHM RSS065N032
Q2, Q4 2 MOSFET, N-ch, 30-V, 10-A, 17.5-mΩ SO8 ROHM RSS100N03
R1 1 Resistor, Chip, 1.8 kΩ , 1/16W, 1% 0603 Std Std
R3 1 Resistor, Chip, 3.3 kΩ , 1/16W, 1% 0603 Std Std
R4, R6 2 Resistor, Chip, 10 kΩ , 1/16W, 1% 0603 Std Std
R5 1 Resistor, Chip, 12 kΩ , 1/16W, 1% 0603 Std Std
R8, R11 2 Resistor, Chip, 5.6 kΩ , 1/16W, 1% 0603 Std Std
R9, R14 2 Resistor, Chip, 0 Ω , 1/16W, 1% 0603 Std Std
R12, R13 2 Resistor, Chip, 10 Ω , 1/16W, 1% 0603 Std Std
R15 1 Resistor, Chip, 430 Ω , 1/16W, 1% 0603 Std Std
R2, R7, R10 0 not mount 0603 Any Any
SW1, SW2 2 Switch, ON-ON Mini Toggle 0.28 × 0.18 inch Nikkai G12AP
TP1, TP2, TP5,
TP11 4 Test Point, White, Thru Hole 0.125 × 0.125 inch Keystone 5012
TP10 1 Test Point, Orange, Thru Hole 0.125 × 0.125
inch Keystone 5013
TP3, TP4, TP6 3 Test Point, Black, Thru Hole 0.125 × 0.125
inch Keystone 5011
TP7, TP8 2 Test Point, Yellow, Thru Hole 0.125 × 0.125
inch Keystone 5014
TP9 1 Test Point, Red, Thru Hole 0.125 × 0.125
inch Keystone 5010
U1 1 IC, Dual Synchronous Step-Down Controller for
Low Voltage Power Rails QFN24 TI TPS53124RGE
List of Materials www.ti.com
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