NCV8871BSTGEVB NCV8871 Automotive Grade Boost Controller Audio Amplifier Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL Description Key Features The NCV8871BST evaluation board provides an opportunity to evaluate the NCV887100 in an audio amplifier power supply type application. The board supplies an 18 V output with 9 A of output current from as low as a 6 V input. The enable pin can also be used to synchronize the supply to an external clock. • • • • • • • 18 V Output Voltage 9 A Output Current Fixed Frequency Operation at 170 kHz Regulates Fully Loaded From as Low as 6 V Input Survives 40 V Load Dump External Clock Synchronization up to 340 kHz Automotive Grade Figure 1. NCV8871BSTGEVB Evaluation Board © Semiconductor Components Industries, LLC, 2012 February, 2012 − Rev. 0 1 Publication Order Number: EVBUM2066/D NCV8871BSTGEVB Table 1. EVALUATION BOARD TERMINAL DESCRIPTIONS Terminal Function VIN Positive dc input voltage. GND Common dc return. VOUT Dc output voltage. EN/SYNC Dc enable voltage and external clock synchronization. A dc logic low disables the device. 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 Ambient Temperature -40 to 85 °C 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 CHARACTERISTICS (TA = 25°C, 4.5 ≤ VIN ≤ 18 V, IOUT ≤ 2 A, unless otherwise specified) Characteristic Conditions Typical Value Unit 18.00 V 4 % 7.4 ms 170 kHz SYNC Frequency 170 to 340 kHz Duty Cycle Range 2 to 88 % 50 A VIN increasing 3.8 V VIN = 13.2 V, IOUT = 5 A 5 % 170 °C OUTPUT VOLTAGE Output Voltage Voltage Accuracy −40 ≤ TA ≤ 85 Soft-start Time SWITCHING REGULATOR Switching Frequency Current Limit Cycle-by-cycle current limit General Input Undervoltage Lockout (UVLO) Efficiency Thermal Shutdown http://onsemi.com 2 NCV8871BSTGEVB TYPICAL WAVEFORMS Figure 2. Normal Operation Figure 3. Gate Drive Falling Edge Figure 4. Gate Drive Rising Edge Figure 5. Synchronization Figure 6. Soft Start with Load http://onsemi.com 3 GND VIN VIN C15 100nF + C2 680uF VIN + GND C3 680uF http://onsemi.com 4 GND C14 330pF VIN GND VFB GND 7 6 R4 1K VFB 8 VC VIN_IC VFB VC VIN 14K R3 8871 EN/SYNC ISNS GND VDRV SER2915H-682KL U1 VDRV 5 VDRV GDRV C4 10000pF R2 10K VC 1uF C1 L1 6.8uH C12 1uF 1 2 3 4 VSW + C5 680uF + C6 680uF EN/SYNC EN/SYNC ISNS R11 0 GDRVR10 0 + C7 680uF GDRV + C8 680uF + C10 680uF VOUT R1 8 mohm ISNS C13 1uF C11 1uF VOUT D1 MBRB2545CTT4G Q2 NTD5802N + C9 680uF Q1 NTD5802N 1 D2 MBR140SFT1G MNT2 CON1 1 C16 100nF MNT3 CON1 1 Place cap close to VIN pin VIN_IC MNT4 CON1 1 MNT1 CON1 VOUT GND VOUT D3 MBR140SFT1G VIN_IC NCV8871BSTGEVB SCHEMATIC Figure 7. NCV8871BSTGEVB Evaluation Board Schematic NCV8871BSTGEVB PCB Layout Figure 8. Top Layout Figure 9. Bottom Layout http://onsemi.com 5 NCV8871BSTGEVB Table 4. BILL OF MATERIALS QTY Description Value Tolerance Footprint Manufacturer Manufacturer’s Part Number Substitution Allowed RoHS Compliant 1 CAP CER 1UF 16V X7R 0603 1 uF 10% 603 Murata Electronics North America GRM188R71C105KA12D Yes Yes 2 CAP ELECT 1000UF 50V FK SMD 1000 uF 20% FKV_CAP Panasonic ECG EEEFK1H102AM No Yes 1 CAP CER 33000PF 50V X7R 0603 33000 pF 10% 603 Murata Electronics North America GRM188R71H333KA61D No Yes 9 CAP 180UF 50V ELECT FM RADIAL 180 uF 20% CAP_8P0 Murata Electronics North America EEUFM1H181L No Yes 3 CAP CER 1UF 50V X7R 1206 1 uF 10% 1206 Murata Electronics North America GCM31MR71H105KA55L Yes Yes 1 CAP CER 2700PF 100V 10% X7R 0603 2700 pF 10% 603 Murata Electronics North America GRM188R72A272KA01D No Yes 2 CAP CER .1UF 50V 10% X7R 0805 100 nF 10% 805 Murata Electronics North America GRM21BR71H104KA01L Yes Yes 1 Do Not Populate Yes Yes 1 45V, 30A D2PAK Schottky Rectifier 45 V / 30 A N/A D2PAK_3 ON Semiconductor MBRB2545CTT4G No Yes 2 DIODE SCHOTTKY 40V 1A SOD123FL 40 V / 1A N/A SOD_123 ON Semiconductor MBR140SFT1G No Yes 1 CONN HEADER 4POS R/A 1.5MM TIN N/A N/A 4PINCONN Coilcraft Inc 2922064 No Yes 1 High Temp SMT Power Inductor 6.8uH 6.8 uH 30A SER2900 Coilcraft Inc SER2915H682KL No Yes 2 MOSFET NCH 40V 101A DPAK 40 V / 101 A N/A DPAK3_DMD ON Semiconductor NTD5802NT4G No Yes 1 RES 0.008 OHM 3W 1% 3015 SMD 0.008 1% 3015 Susumu KRL7638CR008FT1 No Yes 1 RES 6.34K OHM 1/10W 1% 0603 SMD 6.34 K 1% 603 Vishay/Dale CRCW06036K34FKEA Yes Yes 1 RES 14.0K OHM 1/10W 1% 0603 SMD 14.0 K 1% 603 Vishay/Dale CRCW060314K0FKEA Yes Yes 1 RES 1.00K OHM 1/10W 1% 0603 SMD 1.00 K 1% 603 Vishay/Dale CRCW06031K00FKEA Yes Yes 2 RES 0.0 OHM 1/8W 0805 SMD 0 5% 805 Vishay/Dale CRCW08050000Z0EA Yes Yes 13 PIN INBOARD .042" HOLE 1000/PKG N/A N/A TP Vector Electronics K24C/M Yes Yes 4 CONN JACK BANANA UNINS PANEL MOU N/A N/A BANANA Emerson Network Power Conn Solu tions 1080740001 No Yes 1 Automotive NonSync Boost Controller N/A N/A SO IC8_N_ADJ ON Semiconductor NCV8871_00 No Yes 1 Automotive NonSync Boost Controller N/A N/A 10PINDFNP5 ON Semiconductor NCV8872_00 No Yes 4 Hex Spacer 440 1/2" Zinc Plated Steel N/A N/A MOUN THOLE125 McMasterCarr 93620A432 Yes Yes 4 Hex Nut 440 1/4" Zinc Plated Steel N/A N/A MOUN THOLE125 McMasterCarr 90480A005 Yes Yes 603 http://onsemi.com 6 NCV8871BSTGEVB ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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