NCV8871LVB NCV8871 Automotive Grade Boost Controller Low Power Boost Evaluation Board User'sManual http://onsemi.com EVAL BOARD USER’S MANUAL Description Key Features • • • • • • • The NCV8871LVB evaluation board provides an opportunity to evaluate the NCV887100 in a 10 W start stop boost application. The board supplies a 10.6 V output with 1 A of output current from as low as a 5 V input. The enable pin can also be used to synchronize the supply to an external clock. 10.6 V Output Voltage 1 A Output Current Fixed Frequency Operation at 170 kHz Regulates Fully Loaded From as Low as 5 V Input Survives 35 V Load Dump External Clock Synchronization up to 340 kHz Automotive Grade Figure 1. NCV8871LVB Evaluation Board © Semiconductor Components Industries, LLC, 2013 November, 2013 − Rev. 0 1 Publication Order Number: EVBUM2217/D NCV8871LVB 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 35 V Dc Supply Voltage (EN/SYNC) −0.3 to 6 V Ambient Temperature −40 to 85 °C Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 3. ELECTRICAL CHARACTERSITICS (TA = 25°C, 4.5 ≤ VIN ≤ 18 V, IOUT ≤ 2 A, unless otherwise specified) Characteristic Conditions Output Voltage Voltage Accuracy −40 ≤ TA ≤ 85 Switching Frequency Typical Value Unit 10.6 V 4 % 170 kHz Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted. Product performance may not be indicated by the Electrical Characteristics if operated under different conditions. http://onsemi.com 2 3 GND D2 MBR140SFT1G D1 VIN GND C1 100nF Figure 2. NCV8871 Evaluation Board Schematic http://onsemi.com GND C10 820pF + C7 + C8 330uF 330uF MBR140SFT1G Place cap close to VIN pin Place cap close C6 to inductor 100nF VIN VIN VOUT VIN GND L1 15uH VFB GND 7 6 R4 10K VFB 8 VC VIN_IC VFB VC VIN 78.7k R3 8871 EN/SYNC ISNS GND VDRV MSS1048T−153ML U1 VDRV 5 VDRV GDRV C11 4.7nF R1 10k VC 1uF C2 VIN_IC 1 2 3 4 VSW EN/SYNC EN/SYNC ISNS C9 100pF R2 50 mohm VOUT ISNS Q1 MBRA340T3G NTD5807 1 GDRV 1 GDRV MNT3 CON1 1 MNT2 CON1 D3 MNT4 CON1 1 MNT1 CON1 + C4 330uF + C3 330uF C5 1uF VOUT GND VOUT NCV8871LVB SCHEMATIC NCV8871LVB PCB LAYOUT Figure 3. Top Layout Figure 4. Bottom Layout http://onsemi.com 4 NCV8871LVB BILL OF MATERIALS Table 4. BILL OF MATERIALS Item Number Quantity Value Part Number 1 2 100 nF GCM188R71H104KA57D C1, C6 2 1 1 mF GCM188R71C105KA64D C2 3 4 330 mF 35ZLH330M10X12.5 4 1 1 mF GCM21BR7YA105KA55L 5 1 100 pF C9 6 1 820 pF C10 7 1 1.5 nF C11 8 2 MBR140SFT1G MBR140SFT1G 9 1 MBRA340T3G MBRA340T3G D3 10 1 15 mH MSS1048T−153ML L1 11 1 CON1 MNT1 12 1 CON1 MNT2 13 1 CON1 MNT3 14 1 CON1 MNT4 15 1 NTD5807 16 1 21.5k 17 1 80 mW 18 1 78.7k R3 19 1 10K R4 20 1 VSW TP1 21 1 VOUT TP2 22 1 VIN TP3 23 1 VDRV TP4 24 1 GDRV TP5 25 1 VIN TP6 26 1 VC TP7 27 1 ISNS TP8 28 1 GND TP9 29 1 GND TP10 30 1 VFB TP11 31 1 EN/SYNC TP12 32 1 VOUT TP13 33 1 GND TP14 34 1 GND TP15 35 1 GND TP16 36 1 GND TP17 37 1 NCV8871 NTD5802NT4G Part Reference C3, C4, C7, C8 C5 D1, D2 Q1 R1 WSL1206R0800FEA NCV887100D1R2G http://onsemi.com 5 R2 U1 NCV8871LVB ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. 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