NCV8872SEPGEVB

NCV8872SEPGEVB NCV887200 Automotive Grade High-Frequency SEPIC Controller Board Evaluation Board User'sManual http://onsemi.com EVAL BOARD USER’S MANUAL Description Key Features • • • • • • • • This NCV887200 evaluation board provides a convenient way to evaluate a high−frequency current−mode control SEPIC converter design. The topology uses two inductors. No additional components are required, other than dc supplies for the input and enable voltages. An external clock can be used to synchronize the switching frequency. The output is rated 12 V / 1.5 A with a 675 kHz switching frequency over the typical 6 V to 18 V automotive input voltage range. 12 V / 1.5 A Output 675 kHz Switching Frequency (NCV887200) Input Undervoltage Lockout Internal Soft−Start Wide Input Voltage of 6 V to 40 V Regulates through 45 V Load Dump Conditions External Clock Synchronization up to 1.1 MHz Automotive Grade Figure 1. NCV887200 SEPIC Evaluation Board © Semiconductor Components Industries, LLC, 2013 October, 2013 − Rev. 0 1 Publication Order Number: EVBUM2215/D NCV8872SEPGEVB Table 1. EVALUATION BOARD TERMINALS Terminal Function VIN Positive DC input voltage GND Common DC return VOUT Regulated DC output voltage EN/SYNC Enable and synchronization input Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) Rating Value Unit DC Supply Voltage (VIN) −0.3 to 40 V DC Supply Voltage (EN, SYNC) −0.3 to 6 V 45 V Junction temperature −40 to 150 °C Ambient temperature (evaluation board) −40 to 105 °C Peak Transient Voltage (Load Dump on VIN) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 3. ELECTRICAL CHARACTERSITICS (TA = 25°C, 4.5 ≤ VIN ≤ 40 V, VEN = 2 V, VOUT = 3.3 V, 0 ≤ IOUT ≤ 1.2 A, unless otherwise specified) Conditions Characteristic Typical Value Unit SWITCHING Switching Frequency − 675 kHz Soft−start Time − 1.9 ms SYNC Frequency range − 675 − 1025 kHz Rsense = 40 mW 5 A Input Undervoltage Lockout (UVLO) VIN decreasing < 4.75* V Input Undervoltage Lockout (UVLO) VIN increasing 5.23 V Thermal Shutdown TA increasing 170 °C Short Circuit Threshold Voltage VFB as % of Vref 67 % CURRENT LIMIT Cycle−by−cycle Current Limit (FET) PROTECTIONS *See Note 3 from Operating Guidelines http://onsemi.com 2 NCV8872SEPGEVB OPERATIONAL GUIDELINES VFB is below 67% of IC internal VREF (1.2 V) for more than 35 ns after the soft−start period. 4. Optionally for external clock synchronization, connect a pulse source between EN/SYNC and GND. The high state level should be within the 2 to 5 V range, and the low state level within the −0.3 V to 0.8 V range, with a minimum pulse width of 40 ns and a frequency within the 675 and 1100 kHz range. NOTE: The converter was designed for 675 kHz 12 V / 1.5 A continuous mode operation. Operation beyond 675 kHz and/or at a different output voltage may require modifications of feedback loop component and inductor values. 1. Connect a DC input voltage, within the 6 V to 40 V range, between VIN and GND. 2. Connect a DC enable voltage, within the 2.0 V to 5.0 V range, between EN/SYNC and GND. 3. The evaluation board feedback components were selected to for continuous operation at rated 12 V / 1.5 A output power at a minimum input voltage of 6 V. The NCV887200 VIN has its operational voltage diode−ored between the converter output (12 V) and input voltages. The converter turns−on typically at 6.7 V. Once energized, the output voltage supplies power to the IC when the battery voltage is below (approximately) 11.5 V. The power supply will enter a hiccup soft−start mode if Figure 2. Evaluation Board Connections http://onsemi.com 3 NCV8872SEPGEVB TYPICAL PERFORMANCE Start−up VOUT EN Figure 3. Typical Start−up with VIN = 12 V, IOUT = 1 A IL1 IL2 VDS Figure 4. Operational Waveforms, VIN = 12 V, IOUT = 1 A http://onsemi.com 4 NCV8872SEPGEVB SCHEMATIC Figure 5. NCV887200 SEPIC Evaluation Board Schematic http://onsemi.com 5 NCV8872SEPGEVB PCB LAYOUT Figure 6. Top View Figure 7. Bottom View http://onsemi.com 6 NCV8872SEPGEVB BILL OF MATERIALS Table 4. BILL OF MATERIALS Reference Designator(s) Manufacturer’s Part Number Substitution Allowed RoHS Compliant Qty Description C1, C6 2 CAP CER 0.1UF 50V 10% X7R 0805 TDK Corporation CGA4J2X7R1H104K125AA Yes Yes C2 1 FCA_ CAP10X12p5 Panasonic − ECG EEU−FC1H101 No Yes C3 20% FCA_ CAP6P3X11 Chemi−Con EKZE500ELL560MF11D No Yes 10% 1210 Murata Electronics North America GRM32ER71H475KA88L Yes Yes Yes Yes GCM188R71C105KA64D Yes Yes TDK Corporation CGA3E2C0G1H182J080AA Yes Yes 603 Murata Electronics North America GRM188R71C223KA01D Yes Yes 20% CG_CAP5X6 Nichicon PCG1C470MCL1GS No Yes 1 mF 10% 1206 Murata Electronics North America GCM31MR71H105KA55L Yes Yes 470 pF 5% 603 Murata Electronics North America GCM1885C1H471JA16D Yes Yes Yes Yes MBRD360G No Yes ON Semiconductor MBR140SFT1G No Yes COIL_MSS1260 Coilcraft Inc MSS1246T−223ML No Yes 20% COIL_MSS1038 Coilcraft Inc MSS1038T−223ML No Yes 60 V / 38 A N/A DPAK3_DMD ON Semiconductor NVD5865NLT1G No Yes RES 0.0 OHM 1/8W JUMP 0805 SMD 0 N/A 805 Vishay/Dale CRCW08050000Z0EA Yes Yes 1 RES .03 OHM 1W 1% 1206 SMD 0.03 1% 1206 TT Electronics/ Welwyn LRMAM1206−R03FT5 Yes Yes R3 1 RES 1.00 OHM 1/8W 1% 0805 SMD 1 1% 805 Vishay/Dale CRCW08051R00FKEA Yes Yes R4 1 RES 90.9K OHM 1/10W 1% 0603 SMD 90.0 K 1% 603 Yageo RC0603FR−0790K9L Yes Yes R5 1 RES 10.0K OHM 1/10W 1% 0603 SMD 10.0 K 1% 603 Rohm Semiconductor MCR03EZPFX1002 Yes Yes R6 1 RES 10.0 OHM 1/10W 1% 0603 SMD 10 1% 603 Yageo RC0603FR−0710RL Yes Yes R7 1 RES 3.01K OHM 1/10W 1% 0603 SMD 3.01 K 1% 603 Vishay/Dale CRCW06033K01FKEA Yes Yes R8 1 RES 15.0 OHM 1/10W 1% 0603 SMD 15 1% 603 Vishay/Dale CRCW060315R0FKEA Yes Yes R9 1 RES 0.0 OHM 1/10W JUMP 0603 SMD 0 N/A 603 Vishay/Dale CRCW06030000Z0EA Yes Yes TP1, 7, 14, 16, 17, 20 6 PIN INBOARD .042” HOLE 1000/PKG N/A N/A TP Vector Electronics K24C/M Yes Yes Value Tolerance Footprint Manufacturer 100 nF 10% 805 CAP 100UF 50V ELECT FC RADIAL 100 uF 20% 1 CAP ALUM 56UF 50V 20% RADIAL 56 mF C4 1 CAP CER 4.7UF 50V 10% X7R 1210 4.7 mF C5 DNP C7 1 CAP CER 1UF 16V X7R 10% 0603 1 mF 10% 603 Murata Electronics North America C8 1 CAP CER 1800PF 50V 5% NP0 0603 1800 pF 5% 603 C9 1 CAP CER 0.022UF 16V 10% X7R 0603 22000 pF 10% C10, C11, C12 3 CAP POLY ALUM 47UF 16V SMD 47 mF C13 1 CAP CER 1UF 50V X7R 1206 C14 1 CAP CER 470PF 50V 5% NP0 0603 C15 DNP D1 1 60 V, 3.0 A Schottky Rectifier DPAK 60 V / 3A N/A DPAK3_DMD ON Semiconductor D2, D3 2 DIODE SCHOTTKY 40V 1A SOD123FL 40 V / 1A N/A SOD_123 L1 1 High Temp SMT Power Inductor 2.3A 22 mH, 2.3 A 20% L2 1 High Temp SMT Power Inductor 1.9A 22 mH, 1.9 A Q1 1 MOSFET N CH 60V DPAK−4 R1 1 R2 1210 603 http://onsemi.com 7 NCV8872SEPGEVB Table 4. BILL OF MATERIALS Reference Designator(s) Manufacturer’s Part Number Substitution Allowed RoHS Compliant Qty Description Value Tolerance TP2, 3, 5, 6, 8, 9, 15, 18 DNP CIRCUIT PIN PRNTD .020”D .425”L N/A N/A SMALLTP Mill−Max Manufacturing Corp. 3128−2−00−15−00−00−08−0 Yes Yes TP10, 11, 12, 13 4 TERM SOLDER TURRET .219” .109”L N/A N/A TURRET Mill−Max Manufacturing Corp. 2501−2−00−44−00−00−07−0 Yes Yes U1 1 Automotive Non−Sync Boost Controller N/A N/A SOIC8_N_ADJ ON Semiconductor NCV887200 No Yes Mounting Feet 4 BUMPON HEMISPHERE .44X.20 BLACK N/A N/A 0.44 inch circle 3M SJ−5003 (BLACK) Yes Yes Footprint Manufacturer http://onsemi.com 8 onsemi, , and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. 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