LMR62014XMFDEMO/NOPB

User's Guide SNVA500B – September 2011 – Revised April 2017 AN-2183 LMR62014/LMR64010 Demo Board Trademarks All trademarks are the property of their respective owners. 1 Introduction The Texas Instruments LMR62014 and LMR64010 are high frequency switching boost regulators that offer small size and high power conversion efficiency. The parts operate at a 1.6MHz switching frequency. The primary difference between the LMR62014 and LMR64010 is that the LMR62014 has a higher current internal switch FET (with lower breakdown voltage), while the LMR64010 has a higher voltage FET which handles less current. The LMR64010 targets applications with higher output voltages, while the LMR62014 is intended for applications requiring higher load currents at lower output voltages. This user's guide describes the demo board supplied to demonstrate the operation of these parts and give information on its usage. This Demo Board is intended to be used at an ambient temperature of 25°C. Figure 3. LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 1 Features 2 Features • • • • • • 3 www.ti.com 2.7V to 12V Input Voltage Range 12V Output Voltage, and 450mA Output Current from 5V input supply (LMR62014) 24V Output Voltage, and 125mA Output Current from 5V input supply (LMR64010) Switching Frequency of 1.6 MHz Minimal Component Count Small Solution Size (12mm × 17mm) Shutdown Operation The demo board includes a pull-up resistor R3 to enable the device once VIN has exceeded 1.5V. Use the EN post to disable the device by pulling this node to GND. A logic signal may be applied to the post to test startup and shutdown of the device. 4 Adjusting the Output Voltage The output voltage can be changed from 12V/24V to another voltage by adjusting the feedback resistors using the following equation: VOUT = VFB(1 + (R1/R2)) (1) Where VFB is 1.23V. 5 Feedforward Compensation The feedforward capacitor CF should be selected to set the compensation zero at approximately 8 kHz. The value of CF is calculated using: CF = 1 / (2 × π × 8k × R1) (2) The value of CF is calculated after R1 is selected for the output voltage needed for the specific application. For more information on component selection and features, see: • LMR62014 SIMPLE SWITCHER 20Vout, 1.4A Step-Up Voltage Regulator in SOT-23 (SNVS735) • LMR64010 SIMPLE SWITCHER 40Vout, 1A Step-Up Voltage Regulator in SOT-23 (SNVS736) 2 AN-2183 LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated LMR62014 Demo Board Schematic www.ti.com 6 LMR62014 Demo Board Schematic L1 U1 VIN 5 D1 VIN SW VOUT 1 R1 R3 EN 3 4 FB SHDN GND C1 CF 2 R2 GND Chf C2 GND Figure 4. LMR62014 Demo Board Schematic Table 1. Bill of Materials LMR62014 ID Part Number Type Size U1 LMR62014 Boost Regulator SOT-23 L1 NR6045T100M Inductor SMD D1 CRS08 Diode C1 GRM21BR71C225KA12L C2 Parameters Qty Vendor 1 Texas Instruments 10uH, 2.5A, 0.061 ohm, 1 Sumida S-Flat Schottky, 30V, 1.5A 1 Toshiba Capacitor 0805 Ceramic, 2.2uF, 16V, X7R 1 Murata GRM32ER71H475KA88L Capacitor 1210 Ceramic, 4.7uF, 50V, X7R 1 Murata CF C0603C221J5GACTU Capacitor 0603 Ceramic, 220pF, 50V, C0G/NP0 1 Kemet CHF GRM188R71H223KA01D Capacitor 0603 Ceramic, 0.022uF, 50V, X7R 1 Murata R1 CRCW0603115KFKEA Resistor 0603 115 kΩ 1 Vishay R2 CRCW060313K3FKEA Resistor 0603 13.3 kΩ 1 Vishay R3 CRCW06031M00JNEA Resistor 0603 1.0 MegΩ 1 Vishay EN 5014 Test Point Loop Yellow 1 Keystone VIN 5010 Test Point Loop Red 1 Keystone VOUT 5013 Test Point Loop Orange 1 Keystone GND 5011 Test Point Loop Black 2 Keystone SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 3 LMR64010 Demo Board Schematic 7 www.ti.com LMR64010 Demo Board Schematic L1 U1 VIN 5 D1 VIN SW VOUT 1 R1 R3 EN 3 4 FB SHDN GND C1 CF 2 R2 GND Chf C2 GND Figure 5. LMR64010 Demo Board Schematic Table 2. Bill of Materials LMR64010 4 ID Part Number Type Size Parameters Qty Vendor U1 LMR64010 Boost Regulator SOT-23 1 Texas Instruments L1 NR6045T100M Inductor SMD 10uH, 2.5A, 0.061 ohm, 1 Sumida D1 CRS04 Diode S-Flat Schottky, 40V, 1.0A 1 Toshiba C1 GRM21BR71C225KA12L Capacitor 0805 Ceramic, 2.2uF, 16V, X7R 1 Murata C2 GRM32ER71H475KA88L Capacitor 1210 Ceramic, 4.7uF, 50V, X7R 1 Murata CF C0603C121J5GACTU Capacitor 0603 Ceramic, 120pF, 50V, C0G/NP0 1 Kemet CHF GRM188R71H223KA01D Capacitor 0603 Ceramic, 0.022uF, 50V, X7R 1 Murata R1 CRCW0603243KFKEA Resistor 0603 243 kΩ 1 Vishay R2 CRCW060313K3FKEA Resistor 0603 13.3 kΩ 1 Vishay R3 CRCW06031M00JNEA Resistor 0603 1.0 MegΩ 1 Vishay EN 5014 Test Point Loop Yellow 1 Keystone VIN 5010 Test Point Loop Red 1 Keystone VOUT 5013 Test Point Loop Orange 1 Keystone GND 5011 Test Point Loop Black 2 Keystone AN-2183 LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated Quick Setup Procedures www.ti.com 8 Quick Setup Procedures 8.1 LMR62014 Step 1: Connect a power supply to VIN terminals Step 2: Connect a load to VOUT terminals Step 3: EN terminal should be left floating for normal operation. Short this to ground to shutdown the part Step 4: Set VIN = 5V, with 0A load applied, check VOUT with a voltmeter. Nominal 11.9V Step 5:Apply a 450mA load and check VOUT. Nominal 11.9V 8.2 LMR64010 Step 1: Connect a power supply to VIN terminals Step 2: Connect a load to VOUT terminals Step 3: EN terminal should be left floating for normal operation. Short this to ground to shutdown the part Step 4: Set VIN = 5V, with 0A load applied, check VOUT with a voltmeter. Nominal 23.7V Step 5:Apply a 125mA load and check VOUT. Nominal 23.5V Measurements Ammeter A + VOUT GND Ammeter A GND + - Electronic Load - 9 Power Supply VIN Voltmeter V V Voltmeter Evaluation Board Figure 6. Efficiency Measurements SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 5 Measurements www.ti.com Oscilloscope VOUT GND Chf Figure 7. Voltage Ripple Measurements I I I I I GND VOUT 5 6 A B C D E F SPARE 4 VOUT SENSE+ 3 VOUT SENSE - 2 VIN SENSE - 1 VIN SENSE+ EN VIN I I I I I I I Figure 8. Edge Connector Schematic 6 AN-2183 LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated Typical Performance Characteristics www.ti.com 10 Typical Performance Characteristics 95 85 80 90 EFFICIENCY (%) EFFICIENCY (%) 75 85 80 75 70 70 65 60 55 50 65 60 0.0 45 VIN =5.0V 0.1 0.2 0.3 0.4 LOAD CURRENT (A) 40 0.5 95 95 90 90 85 85 80 75 70 65 60 0.05 0.10 LOAD CURRENT (A) Figure 10. Efficiency vs. Load Current LMR62014, VOUT = 12V EFFICIENCY (%) EFFICIENCY (%) Figure 9. Efficiency vs. Load Current LMR62014, VOUT = 12V 0.00 VIN =3.3V 80 75 70 65 VIN =12.0V 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 LOAD CURRENT (A) Figure 11. Efficiency vs. Load Current LMR64010, VOUT = 24V SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback 60 0.000 VIN = 5.0V 0.025 0.050 0.075 0.100 LOAD CURRENT (A) 0.125 Figure 12. Efficiency vs. Load Current LMR64010, VOUT = 24V AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 7 Typical Performance Characteristics 8 www.ti.com Figure 13. Load Transient Waveforms LMR62014 IOUT = 33 to 330mA Figure 14. Load Transient Waveforms LMR64010 IOUT = 13 to 125mA Figure 15. Switching Node and Output Voltage Waveforms LMR62014 Figure 16. Switching Node and Output Voltage Waveforms LMR64010 AN-2183 LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated Typical Performance Characteristics www.ti.com VOUT = 12V 2V/Div EN 2V/Div 200 Ps/DIV Figure 17. Startup Waveform SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 9 Layout 11 www.ti.com Layout Figure 18. Top Layer Figure 19. Top Overlay 10 AN-2183 LMR62014/LMR64010 Demo Board SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated Layout www.ti.com Figure 20. Bottom Layer Figure 21. Bottom Overlay SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback AN-2183 LMR62014/LMR64010 Demo Board Copyright © 2011–2017, Texas Instruments Incorporated 11 Revision History www.ti.com Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from A Revision (April 2013) to B Revision .................................................................................................... Page • • 12 Added text to introduction ................................................................................................................ 1 Changed Typical Performance Characteristics from titles to figure numbers ..................................................... 7 Revision History SNVA500B – September 2011 – Revised April 2017 Submit Documentation Feedback Copyright © 2011–2017, Texas Instruments Incorporated IMPORTANT NOTICE FOR TI DESIGN INFORMATION AND RESOURCES Texas Instruments Incorporated (‘TI”) technical, application or other design advice, services or information, including, but not limited to, reference designs and materials relating to evaluation modules, (collectively, “TI Resources”) are intended to assist designers who are developing applications that incorporate TI products; by downloading, accessing or using any particular TI Resource in any way, you (individually or, if you are acting on behalf of a company, your company) agree to use it solely for this purpose and subject to the terms of this Notice. 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