LMZ14201HEVAL/NOPB

User's Guide SNVA459A – January 2011 – Revised April 2013 AN-2089 LMZ14203H/02H/01H Evaluation Board 1 Introduction The LMZ14203H/02H/01H SIMPLE SWITCHER® power modules for high output voltage are easy-to-use DC-DC solutions capable of driving up to a 3A load with exceptional power conversion efficiency, output voltage accuracy, line and load regulation. They are available in an innovative package that enhances thermal performance and allows for hand or machine soldering. The LMZ14203H/02H/01H Evaluation Board is configured for 12V output voltage from 15V to 42V input. The precision enable input allows for programmable UVLO of the input supply. The resistor voltage divider RENT and RENB set the input UVLO threshold. Connect the VIN turret terminal to the EN turret on the board to enable operation. The external soft-start capacitor CSS facilitates controlled startup output rise time. The resistors RFBT and RFBB set the output voltage. An output feed-forward capacitor CFF across the upper feedback resistor trims for optimum transient response. The control loop operates well with low ESR output capacitors such as ceramic and polymer electrolytic capacitors. The resistor RON sets the operating frequency. See datasheet for component selection details. The LMZ14203H/02H/01H PCB layout offers excellent thermal performance, achieving junction-to-ambient thermal resistance θJA of 14.9°C/W. The evaluation board with its default Bill of Materials offers great EMI performance, complying with the EN 55022 Class B radiated emissions standard. The solution also complies with the CISPR22 conducted emissions standard with the addition of a small input filter. 2 Board Specifications • • • • • • • • • • • 3 VIN = 15V to 42V VOUT = 12V 3A max load at 24VIN and 65°C TAMB Low radiated EMI (EN 55022 Class B compliant) 400kHz switching frequency Enable UVLO set at 13.5V θJA = 14.9°C/W 4 copper layers 2 oz copper on top and bottom layer 1 oz copper on internal layers 6.985 cm x 7.620 cm (2.75 in x 3 in) with 1.575 cm (.062 in) thickness of FR4 laminate material Additional Footprints Additional component mounting pads are available to experiment with alternative input and output capacitor combinations or a zener clamp on the enable input. See Figure 6 for corresponding schematic locations. All trademarks are the property of their respective owners. SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback AN-2089 LMZ14203H/02H/01H Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 1 Additional Footprints www.ti.com U1 EP VIN VOUT FB SS 12VOUT at 3A 7 4 3 2 1 6 GND 15V to 42V VIN RO N EN UVLO at 13.5V 5 Enable RENT 124 k: CFF 0.022 PF RON 249 k: RFBT 34 k: RENB 11.8 k: CIN1 1 PF CIN2 10 PF CSS 4700 pF CO1 1 PF RFBB 2.43 k: CO3 47 PF Figure 1. Evaluation Board Schematic Table 1. LMZ1420xH Bill of Materials, VIN = 15V to 42V, VOUT = 12V, IOUT (MAX) = 3A / 2A / 1A 2 Designator Description Case Size Manufacturer Manufacturer P/N Quantit y U1 SIMPLE SWITCHER® PFM-7 Texas Instruments LMZ14203 or LMZ14202 or LMZ14201 1 CIN4, CO1 1 µF, X7R, 50V 1206 Taiyo Yuden UMK316B7105KL-T 2 CIN2 10 µF, X5R, 50V 1210 Taiyo Yuden UMK325BJ106MM-T 1 CO3 47 µF, 35 mΩ, 16V, Polymer 7343-43 KEMET T525D476M016ATE035 1 CFF 0.022 µF, X7R, 100V 0805 AVX 08051C223JAT2A 1 CSS 4700 pF, X7R, 25V 0805 AVX 08053A472JAT2A 1 RENB 11.8 kΩ 0805 Panasonic ERJ-6ENF1182V 1 RENT 124 kΩ 0805 Panasonic ERJ-6ENF1243V 1 RFBT 34 kΩ 0805 Vishay-Dale CRCW080534K0FKEA 1 RFBB 2.43 kΩ 0805 Panasonic ERJ-6ENF2431V 1 RON 249 kΩ 0805 Vishay-Dale CRCW0805249KFKEA 1 AN-2089 LMZ14203H/02H/01H Evaluation Board SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com 4 Performance Characteristics Unless otherwise specified the following conditions apply: VIN = 24V, VOUT = 12V, TAMB = 25°C LMZ14203H Thermal Derating 3.5 95 3.0 OUTPUT CURRENT (A) EFFICIENCY (%) LMZ14203H Efficiency 100 90 85 80 VIN = 15V VIN = 24V VIN = 30V VIN = 36V VIN = 42V 75 70 0.0 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) 1.0 -20 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE (°C) LMZ14202H Thermal Derating OUTPUT CURRENT (A) 90 85 80 VIN = 15V VIN = 24V VIN = 30V VIN = 36V VIN = 42V 75 70 0.5 1.0 1.5 OUTPUT CURRENT (A) 2.0 1.5 1.0 0.5 0.0 2.0 -20 LMZ14201H Efficiency 95 1.0 OUTPUT CURRENT (A) 1.2 90 85 80 VIN = 15V VIN = 24V VIN = 30V VIN = 36V VIN = 42V 75 70 0.2 0.4 0.6 0.8 OUTPUT CURRENT (A) SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback VIN = 15V VIN = 24V VIN = 42V 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE (°C) LMZ14201H Thermal Derating 100 0.0 VIN = 15V VIN = 24V VIN = 42V 2.5 95 EFFICIENCY (%) 1.5 0.0 3.0 LMZ14202H Efficiency EFFICIENCY (%) 2.0 0.5 100 0.0 2.5 0.8 0.6 0.4 0.2 0.0 1.0 -20 VIN = 15V VIN = 24V VIN = 42V 0 20 40 60 80 100 120 140 AMBIENT TEMPERATURE (°C) AN-2089 LMZ14203H/02H/01H Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 3 Performance Characteristics www.ti.com LMZ14203H Startup LMZ14203H Line and Load Regulation OUTPUT VOLTAGE (V) 12.6 VOUT ENABLE 5V/Div VIN = 15V VIN = 24V VIN = 30V VIN = 36V VIN = 42V ±1% 12.4 12.2 12.0 11.8 1 ms/Div 11.6 0.0 LMZ14203H Transient Response 30% to 100% Load Step 1.0 A/Div 3.0 LMZ14203H Current Limit 6.0 VOUT=12V DC CURRENT LIMIT LEVEL (A) 200 mV/Div 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) IOUT 1 ms/Div 5.5 5.0 4.5 4.0 Fsw = 250kHz Fsw = 400kHz Fsw = 600kHz 3.5 3.0 5 LMZ14202H Current Limit 40 45 3.5 DC CURRENT LIMIT LEVEL (A) DC CURRENT LIMIT LEVEL (A) 15 20 25 30 35 INPUT VOLTAGE (V) LMZ14201H Current Limit 4.5 4.0 3.5 3.0 Fsw = 250kHz Fsw = 400kHz Fsw = 600kHz 2.5 2.0 3.0 2.5 2.0 Fsw = 250kHz Fsw = 400kHz Fsw = 600kHz 1.5 1.0 5 4 10 10 15 20 25 30 35 INPUT VOLTAGE (V) 40 AN-2089 LMZ14203H/02H/01H Evaluation Board 45 5 10 15 20 25 30 35 INPUT VOLTAGE (V) 40 45 SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated Performance Characteristics www.ti.com LMZ14203H Radiated EMI, IOUT = 3A 80 Radiated Emissions EN 55022 Limit (Class B) 70 CONDUCTED EMISSIONS (dB V) RADIATED EMISSIONS (dB V/m) 80 LMZ14203H Conducted EMI, IOUT = 3A with 3.3µH 2x10µF LC line filter added 60 50 40 30 20 10 0 200 400 600 800 FREQUENCY (MHz) 60 50 40 30 20 10 1000 LMZ14202H Radiated EMI, IOUT = 2A 80 60 50 40 30 20 10 1 10 FREQUENCY (MHz) 100 LMZ14202H Conducted EMI, IOUT = 2A with 3.3µH 2x10µF LC line filter added 80 Radiated Emissions EN 55022 Limit (Class B) 70 0.1 CONDUCTED EMISSIONS (dB V) RADIATED EMISSIONS (dB V/m) Conducted Emissions CISPR 22 Quasi Peak CISPR 22 Average 0 0 0 70 Conducted Emissions CISPR 22 Quasi Peak CISPR 22 Average 60 50 40 30 20 10 0 0 200 400 600 800 FREQUENCY (MHz) 1000 LMZ14201H Radiated EMI, IOUT = 1A 80 60 50 40 30 20 10 0 1 10 FREQUENCY (MHz) 100 LMZ14201H Conducted EMI, IOUT = 1A with 3.3µH 1µF LC line filter added 80 Radiated Emissions EN 55022 Limit (Class B) 70 0.1 CONDUCTED EMISSIONS (dB V) RADIATED EMISSIONS (dB V/m) 70 70 Conducted Emissions CISPR 22 Quasi Peak CISPR 22 Average 60 50 40 30 20 10 0 0 200 400 600 800 FREQUENCY (MHz) SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback 1000 0.1 1 10 FREQUENCY (MHz) 100 AN-2089 LMZ14203H/02H/01H Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 5 PCB Layout Diagrams 5 www.ti.com PCB Layout Diagrams Gerber and CAD files can be download from the LMZ14203H product folder. Figure 2. Top Layer 6 AN-2089 LMZ14203H/02H/01H Evaluation Board SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated PCB Layout Diagrams www.ti.com Figure 3. Internal Layer I (Ground) Heat Sinking Layer SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback AN-2089 LMZ14203H/02H/01H Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 7 PCB Layout Diagrams www.ti.com Figure 4. Internal Layer II (Ground) Heat Sinking Layer 8 AN-2089 LMZ14203H/02H/01H Evaluation Board SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated PCB Layout Diagrams www.ti.com Figure 5. Bottom Layer (Ground and Routing) Heat Sinking Layer SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback AN-2089 LMZ14203H/02H/01H Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 9 PCB Schematic 6 www.ti.com PCB Schematic Cin5 DNS Cin1 10 uF DNS TT5 Vo VOUT VOUT TT7 EN UVLO AT 13.5V VOUT 8 U1 EP TT1 GND GND TT2 GND GND TT3 GND GND GND TT4 GND GND VIN VOUT FB SS GND EN RON VIN TP1 TP2 VIN VIN TT10 VIN EC1 A 1 B 2 C 3 D 4 E 5 F 6 H 7 J 8 K 9 L 10 VOUT_S+ GND VIN/VOUT_S- ENABLE OPT VIN_S+ 7 6 5 4 3 2 1 Rent 124k Cff 0.022 uF Ron 249k Renb 11.8k 2 1 D1 5.1V DNS Cin2 10 uF Cin3 10 uF DNS Rfbt 34k Cin4 1 uF Css 4700 pF Co1 1 uF Rfbb 2.43k 22 Co2 Co3 Co4 Co5 47 uF 47 uF 22 uF uF DNS DNS DNS Co8 1 uF DNS Co3 Co3 47 uF 47 uF DNS DNS Figure 6. Detailed Schematic DNS = Component not installed L V+ INPUT SUPPLY GND VIN C LMZ1420xH Board GND Figure 7. Conducted EMI LC Filter Configuration 10 AN-2089 LMZ14203H/02H/01H Evaluation Board SNVA459A – January 2011 – Revised April 2013 Submit Documentation Feedback Copyright © 2011–2013, Texas Instruments Incorporated 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. 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