TPS51124EVM-001

www.ti.com Table of Contents User’s Guide TPS51124 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 4.1 Test Setup.......................................................................................................................................................................... 4 4.2 Test Procedure................................................................................................................................................................... 4 4.3 Start-Up Performance........................................................................................................................................................ 5 4.4 Transient Performance.......................................................................................................................................................5 5 Configuration.......................................................................................................................................................................... 6 5.1 Switching Frequency Selection.......................................................................................................................................... 6 5.2 Bootstrap Diode Selection..................................................................................................................................................6 6 EVM Assembly Drawing and PCB Layout............................................................................................................................ 7 7 List of Materials.....................................................................................................................................................................10 8 References.............................................................................................................................................................................11 9 Revision History....................................................................................................................................................................11 Trademarks D-CAP™ is a trademark of Texas Instruments. All trademarks are the property of their respective owners. SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 1 Description www.ti.com 1 Description The TPS51124 is a dual, adaptive on-time D-CAP™ mode synchronous buck controller. The part enables system designers to cost-effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milli-ampere range. The main control loop for the TPS51124 uses D-CAP mode that is optimized for low-ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power-good signals for each channel allow flexibility of power sequencing. The part provides a convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V, and output voltages from 0.76 V to 5.5 V. The HPA178 (TPS51124EVM) evaluation module is a high efficiency, dual synchronous buck converter providing 1.05 V at 10 A and 1.5 V at 10 A from 5-V to 25-V input. This user’s guide describes the HPA178 performance in medium switching frequency. 2 Electrical Performance MIN TYP MAX UNIT Input voltage range (V5IN) SPECIFICATIONS TEST CONDITIONS 4.5 5.0 5.5 V Input voltage range (VIN) 5 12 25 V Output voltage Operating frequency CH1 TONSEL: Float VIN = 12 V, IOUT1 = 10 A Output current Overcurrent limit VIN = 12 V Output ripple voltage VIN = 12 V,IOUT = 10 A Output voltage Operating frequency CH2 2 TONSEL: Float VIN = 12 V, IOUT2 = 10 A Output current 1.05 V 300 kHz 10 A 13 A 35 mVp-p 1.5 V 360 kHz 10 A Overcurrent limit VIN = 12 V 13 A Output ripple voltage VIN = 12 V, IOUT2 = 10 A 35 mVp-p TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback www.ti.com Schematic 3 Schematic Figure 3-1. TPS51124 EVM Schematic Diagram SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 3 Test Setup and Results www.ti.com 4 Test Setup and Results 4.1 Test Setup Connect the test equipment and HPA178 EVM board as shown in Figure 4-1. DMM4 + - 5V/1A Power supply Oscilloscope + CH1 V5IN _GND V5IN + TP10 - DMM1 - CN1 TP8 + VO1 VO1_GND TP5 TP4 HPA178 TPS51124EVM-001 VIN + TP9 - Electronic Load1 - TP6 CN2 VO2 TP7 DMM3 12V/10A Power supply TP3 VIN _GND VO2_GND + + Electronic Load2 CH2 Oscilloscope DMM2 + FAN Figure 4-1. Equipment Setup for HPA178 EVM Board 4.2 Test Procedure 1. 2. 3. 4. 5. 6. 4 Ensure the switches SW1 (EN1) and SW2 (EN2) are in the “OFF” position. Ensure the shunt jumper for JP1 is set 3-pin to 4-pin (Med). Apply appropriate V5IN voltage to V5IN and V5IN_GND terminals. Apply appropriate VIN voltage to VIN and VIN_GND terminals. Turn on SW1 (EN1). The CH1-output will start up. Turn on SW2 (EN2). The CH2-output will start up. TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback www.ti.com Test Setup and Results 4.3 Start-Up Performance Figure 4-2. 1.05-V Start-Up Performance Figure 4-3. 1.5-V Start-Up Performance 4.4 Transient Performance Figure 4-4. 1.05-V Load Transient Performance SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback Figure 4-5. 1.5-V Load Transient Performance TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 5 Configuration www.ti.com 5 Configuration This EVM could be set to the desired configurations of the user. Please refer to the following specific configuration setting sections. 5.1 Switching Frequency Selection Switching frequency can be set by the TONSEL pin using JP1 on the EVM. The default setting is medium. Table 5-1. Switching Frequency Selection Jumper (JP1) Set to Frequency(1) TONSEL Typ CH1 CH2 Top(1-2 pin shorted) GND Slow 240 kHz 300 kHz CENTER(3-4 pin shorted) Float Medium 300 kHz 360 kHz Bottom(5-6 pin shorted) V5FILT Fast 360 kHz 420 kHz (1) Frequencies are approximate. 5.2 Bootstrap Diode Selection Bootstrap diodes (D1, D2) are not populated on this EVM since the TPS51124 has them built in. External Schottky diodes can be added in order to further improve the efficiency. 6 TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback www.ti.com EVM Assembly Drawing and PCB Layout 6 EVM Assembly Drawing and PCB Layout Figure 6-1. Top Assembly Figure 6-2. Top Layer SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 7 EVM Assembly Drawing and PCB Layout www.ti.com Figure 6-3. Inner Layer 1 Figure 6-4. Inner Layer 2 8 TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback www.ti.com EVM Assembly Drawing and PCB Layout Figure 6-5. Bottom Layer SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 9 List of Materials www.ti.com 7 List of Materials Reference Designator QTY Description Size Mfr Part Number — 1 Shunt,100-mil, Black 0.100 3M 929950-00 C1 0 Capacitor,Aluminum 0.26 × 0.26 inch Any Any C13, C14 2 Capacitor, POSCAP, 330 mF, 2.5V18-mW, 20% 7343 SANYO 2R5TPE330MI C15 1 Capacitor,Ceramic, 4.7 mF,6.3 V, BJ, 0805 20% TDK C2012X5R0J475K C16 1 Capacitor,Ceramic, 1 mF,6.3 V, BJ, 20% 0805 TDK C2012X5R0J105K C17 1 Capacitor,Ceramic, 18 pF, 50 V, BJ, 20% 0805 Std Std C2, C3, C4, C5 4 Capacitor,Ceramic, 10 mF,25 V, BJ , 20% 1210 TDK / TaiyoYuden C3225JB1E106 / TMK325BJ106MM C6, C11 2 Capacitor,Ceramic, 0.1 mF,50 V, BJ, 20% 0805 Std Std C7, C8 2 Capacitor, POSCAP, 330 mF, 2.5V15-mW, 20% 7343 SANYO 2R5TPE330MF C9, C10, C12, C18 0 Capacitor,Ceramic 0805 Any Any CN1, CN2 2 Adaptor, 3.5-mm probe clip (or 131-5031-00) 0.2 Tektronix 131-4244-00 D1, D2 0 Diode,Schottky, 0.5 A, 30 V SOD-123 Any Any J1, J2 2 TerminalBlock, 2-pin, 15 A, 5.1 mm 0.40 × 0.35 inch OST ED1609 JP1 1 Header, 2×3-pin,100mil spacing (36- 0.20 × 0.30 inch pin strip) Sullins PTC36DAAN L1, L2 2 Inductor,1.0 μH, 20.5 A, 2 mW TOKO FDA1254-1R0M Q1, Q3 2 MOSFET,N-ch, 30 V, 11 A, 12.5 mW SO8 IR IRF7821 Q2, Q4 2 MOSFET,N-ch, 30 V, 13.8 A, 6.8 mW SO8 IR IRF8113 R1, R7 2 Resistor,Chip, 100 kW,1/10W, 1% 0805 Std Std R12, R13 0 Resistor,Chip 0805 Std Std R2, R9, R10 3 Resistor,Chip, 3.3 W,1/10W, 1% 0805 Std Std R3 1 Resistor,Chip, 28.7 kW,1/10W, 1% 0805 Std Std R4, R6 2 Resistor,Chip, 75 kW,1/10W, 1% 0805 Std Std R5 1 Resistor,Chip, 73.2 kW,1/10W, 1% 0805 Std Std R8, R11 2 Resistor,Chip, 6.8 kW,1/10W, 1% 0805 Std Std SW1, SW2 2 Switch,ON-ON Mini Toggle 0.28 × 0.18 inch Nikkai G12AP TP1, TP2 2 Testpoint, White, Thru hole 0.125× 0.125 inch Keystone 5012 TP10 1 Testpoint, Orange, Thru hole 0.125× 0.125 inch Keystone 5013 TP3, TP4, TP5, TP6 4 Testpoint, Black, Thru hole 0.125× 0.125 inch Keystone 5011 TP7, TP8 2 Testpoint, Yellow, Thru hole 0.125× 0.125 inch Keystone 5014 TP9 1 Testpoint, Red, Thru hole 0.125× 0.125 inch Keystone 5010 U1 1 IC, Dual Synchronous Step-Down Controller for Low Voltage Power Rails QFN32 TI TPS51124RHB VIN_GND,VIN, V5IN,V5IN_GND 4 Pin,Wiring Terminal 0.09(D) × 0.31 inch MillMax 3183-2-00-15-0000-080 10 0.496 × 0.532 inch TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback www.ti.com References 8 References Texas Instruments, TPS51124 Dual Synchronous Step-Down Controller for Low Voltage Power Rails Data Sheet 9 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (June 2008) to Revision B (March 2022) Page • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 • Updated the user's guide title............................................................................................................................. 2 SLUU252B – APRIL 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51124 Buck Controller Evaluation Module User's Guide Copyright © 2022 Texas Instruments Incorporated 11 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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