TPS51120EVM-001

www.ti.com Table of Contents User’s Guide TPS51120 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 Skip Mode and Faults Disable Selection............................................................................................................................6 5.3 Output Voltage Setting Selection....................................................................................................................................... 6 5.4 Control Scheme Selection..................................................................................................................................................6 6 EVM Assembly Drawing and PCB Layout............................................................................................................................ 8 7 List of Materials.....................................................................................................................................................................11 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. SLUU240B – JANUARY 2006 – REVISED MARCH 2022 TPS51120 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 1 Description www.ti.com 1 Description The TPS51120 is a highly sophisticated dual current mode synchronous step-down controller. It is a full-featured controller designed to run directly off three to four-cell Li-ion battery and provide high power and 5-V, 3.3-V, or both, standby regulation for all the downstream circuitry in a notebook computer system. High current, 100-mA, 5-V, or 3.3-V on-board linear regulators have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors, and seamless transition to reduced frequency operation at light-load condition. Optional D-CAP™ mode operation optimized for SP-CAP or POSCAP output capacitors allows further reduction of external compensation parts. The TPS51120EVM-001 evaluation module is a high efficiency, dual synchronous buck converter providing 5 V at 6 A and 3.3 V at 6 A from 8-V to 25-V input. This user’s guide describes the TPS51120EVM-001 performance in D-CAP mode and RDS(on) current sensing. 2 Electrical Performance Table 2-1. Electrical Performance Specifications Test Conditions Input voltage range (VBAT) MIN TYP MAX Unit 8 12 25 V Output voltage CH1 5 V 280 kHz VBAT = 8 V to 25 V 6 A VBAT = 12 V 10 A Operating frequency TONSEL: VREF2, VBAT = 12 V, IOUT1 = 6 A Output current Overcurrent limit Output ripple voltage VBAT = 12 V, IOUT1 = 6 A Output voltage CH2 2 40 mVp-p 3.3 V 430 kHz Operating frequency TONSEL: VREF2, VBAT = 12 V, IOUT2 = 6 A Output current VBAT = 8 V to 25 V Overcurrent limit VBAT = 12 V 10 A Output ripple voltage VBAT = 12 V, IOUT2 = 6 A 45 mVp-p TPS51120 Buck Controller Evaluation Module User's Guide 6 A SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Schematic 3 Schematic Figure 3-1. TPS51120 EVM Schematic Diagram SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback TPS51120 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 TPS51120EVM-001 board as shown in Figure 4-1. 4. Test Setup and Results 4.1. Test setup Connect test equipment and TPS51120EVM-001 board as shown in Figure 2. Oscilloscope CH1 DMM4 - + + DMM1 - CN1 V R EG 5 DMM6 + HPA153 TPS51120EVM V O 1_G N D + - Electronic Load1 V B A T+ V R EF2 + DMM3 12V/10A Power supply V B AT_G N D - V O 2_G N D DMM5 + VO 1 V R EG 3 VO 2 CN2 + Electronic Load2 DMM2 CH2 Oscilloscope + Figure 4-1. Equipment Setup for TPS51120EVM-001 Board 4.2 Test Procedure 1. Make sure the switches SW1 (EN1), SW2 (EN2), SW3 (EN5), and SW4 (EN3) are in the “OFF” position. 2. Make sure the shunt jumper for JP1 is set 5-pin to 6-pin (Med2), and shunt jumper for JP2 is set 1-pin to 2pin (auto-skip). 3. Apply appropriate VBAT voltage to VBAT1 and VBAT_GND1 terminals. 4. Turn on SW3 (EN5) and VREG5 (5V-LDO) starts up. 5. Turn on SW4 (EN3) and VREG3 (3.3V-LDO) starts up. 6. When SW3 and SW4 stay on, VREF2 (2V-REF) enables. 7. When SW3 and SW4 stay on and turn on SW1 (EN1), CH1-output will start up. 8. When SW3 and SW4 stay on and turn on SW2 (EN2), CH2-output will start up. 4 TPS51120 Buck Controller Evaluation Module User's Guide SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Test Setup and Results 4.3 Start-Up Performance Figure 4-2. 5-V Start-Up Waveforms Figure 4-3. 3.3-V Start-Up Waveforms 4.4 Transient Performance Figure 4-4. 5-V Load Transient Response Figure 4-5. 3.3-V Load Transient Response SLUU240B – JANUARY 2006 – REVISED MARCH 2022 TPS51120 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 5 Configuration www.ti.com 5 Configuration This EVM could be set to the user’s desirable configurations. Please refer to the following specific configuration setting sections. 5.1 Switching Frequency Selection The switching frequency can be set by the TONSEL pin using JP1 on the EVM. The default setting is Medium2. Table 5-1. Switching Frequency Selection Frequency(1) Jumper (JP1) Set to Top (1-2 pin shorted) TYP CH1 CH2 Slow 180 kHz 270 kHz 2nd (3-4 pin shorted) Medium1 220 kHz 330 kHz 3rd (5-6 pin shorted) Medium2 280 kHz 430 kHz Fast 380 kHz 580 kHz Bottom (7-8 pin shorted) (1) Frequencies are approximate. 5.2 Skip Mode and Faults Disable Selection Skip mode can be set by the SKIPSEL pin using JP2 on the EVM. In addition, faults disable mode can be selected for debugging purpose. The default setting is auto-skip and fault enable. Table 5-2. Skip Mode Selection Jumper (JP2) set to Skip Top (1-2 pin shorted) Auto-skip Enable 2nd (3-4 pin shorted) Auto-skip Disable PWM Enable Bottom (5-6 pin shorted) Faults 5.3 Output Voltage Setting Selection Output voltage can be set by the VFBx pin using some resistors on the EVM. The default setting is adjustable output. Table 5-3. Output Voltage Setting Selection (CH1) Adjustable output Fixed output; 5 V R3 R4 R9 7.5 kW 30 kW Open Open Open 0W Table 5-4. Output Voltage Setting Selection (CH2) R28 R29 R25 Adjustable output 7.5 kW 17.2 kW Open Fixed output; 3.3 V Open Open 0W 5.4 Control Scheme Selection The control scheme can be set by the COMPx pin using some resistors and capacitors on the EVM. The default setting is D-CAP mode. Table 5-5. Control Scheme Selection (CH1) D-CAP mode Current mode(1) (1) R12 C9 C11 R14 Shorted Open Open Open Open Put on Put on Put on When current mode is selected, please add appropriate parts on C9, C11, and R14 and cut the trace between the pads of R12. Table 5-6. Control Scheme Selection (CH2) D-CAP mode 6 R24 C15 C14 R20 Shorted Open Open Open TPS51120 Buck Controller Evaluation Module User's Guide SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com Configuration Table 5-6. Control Scheme Selection (CH2) (continued) Current (1) mode(1) R24 C15 C14 R20 Open Put on Put on Put on When current mode is selected, please add appropriate parts on C15, C14, and R20 and cut the trace between the pads of R24. SLUU240B – JANUARY 2006 – REVISED MARCH 2022 TPS51120 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 7 EVM Assembly Drawing and PCB Layout www.ti.com 6 EVM Assembly Drawing and PCB Layout Figure 6-1. Top Assembly Figure 6-2. Bottom Assembly 8 TPS51120 Buck Controller Evaluation Module User's Guide SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com EVM Assembly Drawing and PCB Layout Figure 6-3. Top Layer Figure 6-4. Inner Layer 1 SLUU240B – JANUARY 2006 – REVISED MARCH 2022 TPS51120 Buck Controller Evaluation Module User's Guide Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated 9 EVM Assembly Drawing and PCB Layout www.ti.com Figure 6-5. Inner Layer 2 Figure 6-6. Bottom Layer 10 TPS51120 Buck Controller Evaluation Module User's Guide SLUU240B – JANUARY 2006 – REVISED MARCH 2022 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated www.ti.com List of Materials 7 List of Materials Reference Designator QTY Description Size Mfr Part Number — 2 Shunt,100 mil, Black 0.100 3M 929950-00 C1, C24 0 Capacitor,Ceramic 1210 Any Any C13 1 Capacitor,Ceramic, 1 mF,6.3 V, BJ, 20% 0805 TDK C2012X5R0J105K C16, C17 2 Capacitor,Ceramic, 10 mF,6.3 V, BJ, 20% 0805 TDK C2012X5R0J106K C2, C3, C25, C26 4 Capacitor,Ceramic, 10 mF,25 V, BJ , 20% 1210 Taiyo Yuden TMK325BJ106MM C4, C7, C9, C11, C12, C14, C15, C19,C27 0 Capacitor,Ceramic 0805 Any Any C5, C18, C22 3 Capacitor,Ceramic, 1 nF, 50 V, BJ, 20% 0805 Std Std C6, C23 2 Capacitor,Ceramic, 0.1 mF,50 V, BJ, 20% 0805 Std Std C8, C10, C20, C21 4 Capacitor,POSCAP, 150 mF, 6.3 V, 55 mW, 20% 7343 SANYO 6TPB150ML CN1, CN2 2 Adaptor, 3.5-mm probe clip (or 131-5031-00) 0.2 Tektronix 131-4244-00 D1, D4 0 Diode,Schottky, 0.5 A, 30 V SOD-123 Any Any D2, D3 0 Diode,Schottky, 1 A, 30 V SMA Any Any JP1 1 Header, 2 × 4 pin,100-mil spacing (36-pin strip) 0.20 × 0.40 inch Sullins PTC36DAAN JP2 1 Header, 2 × 3 pin, 100-mil spacing (36-pin strip) 0.20 × 0.30 inch Sullins PTC36DAAN L1 1 Inductor,4.7 μH, 12.8 A, 8.8 mW 0.496 × 0.532 inch Toko FDA1254-4R7M L2 1 Inductor,2.2 μH, 17.8 A, 4.5 mW 0.496 × 0.532 inch Toko FDA1254-2R2M Q1, Q4 2 MOSFET, N-ch, 30 V, 11 A, 9.1 mW SO8 IR IRF7821 Q2, Q3 2 MOSFET, N-ch, 30 V, 16 A, 4.0 mW SO8 IR IRF7832 R1, R2, R5, R8, R9, R11– 0 Resistor,Chip 0805 Any Any R10, R26 2 Resistor,Chip, 100 kW,1/10W, 1% 0805 Std Std R16, R23 0 Resistor,Metal Strip, 1 W, 1% 2512 Std Std R17 1 Resistor,Chip, 3.6 kW,1/10W, 1% 0805 Std Std R19 1 Resistor,Chip, 3.3 kW,1/10W, 1% 0805 Std Std R29 1 Resistor,Chip, 17.2 kW,1/10W, 1% 0805 Std Std R3, R6, R28 3 Resistor,Chip, 7.5 kW,1/10W, 1% 0805 Std Std R4 1 Resistor,Chip, 30 kW,1/10W, 1% 0805 Std Std R7, R18, R30 3 Resistor,Chip, 5.1 W,1/10W, 1% 0805 Std Std SW1, SW2, SW3, SW4 4 Switch,ON-ON Mini Toggle 0.28 × 0.18 inch Nikkai G12AP TP1–TP5 5 Pin,Probe monitor 0.12(D) × 0.4 inch MillMax or MAC8 LC-2-S U1 1 IC, Dual Current Mode, Sync. Step-down Controller QFN32 TI TPS51120RHB VO1, VO2,VO1_GND1, VO2_GND1, VBAT_GND1,VBAT1 6 Pin, Wiring Terminal 0.12(D) × 0.4 inch MillMax or MAC8 3183-2-00-15-00-00-080 or WT-3-1 R15, R20–R22, R24, R25, R27, R31, R32 8 References Texas Instruments, TPS51120 Dual Current Mode, Synchronous Step-Down Controller data sheet 9 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (February 2006) 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 SLUU240B – JANUARY 2006 – REVISED MARCH 2022 TPS51120 Buck Controller Evaluation Module User's Guide Submit Document Feedback 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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