NCV896530EVB NCV896530 Evaluation Board User'sManual http://onsemi.com EVAL BOARD USER’S MANUAL Description The NCV896530EVB evaluation board provides an opportunity to evaluate the NCV896530 in a convenient form factor with an adjustable output. The board contains four potentiometers, allowing the user to coarsely and finely adjust each output independently. The outputs are capability of providing up to 1 A each and 1.6 A total. The two enable pins allow each switcher to be used independently, while the SYNC pin allows you to synchronize the oscillator to an external clock up to 2.7 MHz and the POR pin reports the state of the outputs. Key Features • • • • • • • Dual 0.9 V – 3.3 V Adjustable Output 1 A Output Current Per Channel, 1.6 A Total Fixed Frequency Operation at 2.1 MHz 2.7 V − 5.5 V Input Voltage Range External Clock Synchronization up to 2.7 MHz Output Monitoring Automotive Grade Figure 1. NCV896530EVB Evaluation Board © Semiconductor Components Industries, LLC, 2013 September, 2013 − Rev. 0 1 Publication Order Number: EVBUM2214/D NCV896530EVB Table 1. EVALUATION BOARD TERMINAL DESCRIPTION Terminal Function VIN Positive dc input voltage. GND Common dc return. VOUT1 Dc output voltage for SMPS1. EN1 Dc enable voltage for SMPS1. A dc logic high enables the device. VOUT2 Dc output voltage for SMPS2. EN2 Dc enable voltage for SMPS2. A dc logic high enables the device. SYNC External clock synchronization. POR Power on reset pin. Pulls low if either output is out of regulation. By default this pin is pulled up to VIN Table 2. EVALUATION BOARD POTENTIOMETER DESCRIPTIONS Potentiometer name Function V1 ADJ F Fine adjust for SMPS1 output. V1 ADJ C Coarse adjust for SMPS1 output. V2 ADJ F Fine adjust for SMPS2 output. V2 ADJ C Coarse adjust for SMPS2 output. Table 3. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND unless otherwise noted) Rating Dc Supply Voltage (VIN) Dc Supply Voltage (EN1,EN2,SYNC) Ambient Temperature Value Unit −0.3 to 6 V −0.3 to 6, VIN + 0.3 V −40 to 105 °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 4. ELECTRICAL CHARACTERSITICS (TA = 25°C, 4.5 ≤ VIN ≤ 18 V, IOUT ≤ 2 A, unless otherwise specified) Characteristic Conditions Typical Value Unit OUTPUT VOLTAGE Output Voltage − 0.9 to 3.3 V Soft−start Time − 700 ms Switching Frequency − 2.2 MHz SYNC Frequency − 1.8 to 2.7 MHz 1.7 A SWITCHING REGULATOR CURRENT LIMIT Current limit GENERAL Input Undervoltage Lockout (UVLO) VIN falling 2.4 V Efficiency VIN = 5 V, IOUT = 1 A 70 % 170 °C Thermal Shutdown http://onsemi.com 2 NCV896530EVB TYPICAL WAVEFORMS Figure 2. Normal Operation Figure 3. Synchronization Figure 4. Start Up http://onsemi.com 3 VOUT1− TP4 VOUT1+ TP3 VIN− TP2 VIN+ Figure 5. Evaluation Board Schematic http://onsemi.com RSYNC1 2.00M RPOR1 510K VIN SYNC TP13 SYNC RA2 500K POT RFB2 46.4K POR TP12 POR GND RFB1 220K VOUT1 FB1 TP8 VOUT1 CFT1 18pF EN1 TP10 FB1 EN1 SYNC VIN SW1 TP14 GND TP15 GND GND Testpoints 2.2uH L1 Locate C1 as close to DUT pin 4 as possible! RA1 10K POT C1 10uF C2 10uF GND VIN FB1 EN1 SYNC VIN SW1 U1 J1 ENABLE1 1 2 3 4 5 REN1 10.0K EN1 VIN 10 9 8 7 6 J2 ENABLE2 GND FB2 EN2 POR GND SW2 NCV896530 EPAD 11 TP1 2 1 4 REN2 10.0K EN2 1 2 TP7 VIN EN2 TP11 FB2 EN2 POR GND SW2 FB2 RA4 500K POT RA3 10K POT RFB4 46.4K RFB3 220K VOUT2 C3 10uF GND TP5 Document Number Main Page Wednesday, August 28, 2013 Date: NCV896530 Demo Board Sheet 1 of 1 ON Semiconductor Corporation Rev 1.00 VOUT2− TP6 VOUT2+ To lower VoutX below 0.9V,lower RFB1/3 or raise RFB2/4. CFT2 18pF Size A Title L2 2.2uH TP9 VOUT2 NCV896530EVB SCHEMATIC NCV896530EVB PCB LAYOUT Figure 6. Top Layout Figure 7. Bottom Layout http://onsemi.com 5 NCV896530EVB BILL OF MATERIALS Table 5. BILL OF MATERIALS Reference Value PCB Footprint Manufacturer’s Part Number Digi−Key Part Number CFT1 18 pF 603 GRM1885C1H180JA01D 490−1409−1−ND CFT2 18 pF 603 GRM1885C1H180JA01D 490−1409−1−ND C1 10 mF 805 GRM21BR71A106KE51L 490−3905−1−ND C2 10 mF 805 GRM21BR71A106KE51L 490−3905−1−ND C3 10 mF 805 GRM21BR71A106KE51L 490−3905−1−ND J1 ENABLE1 JMP 22−28−4023 WM6502−ND J2 ENABLE2 JMP 22−28−4023 WM6502−ND L1 2.2 mH WE−PD−S 7447785002 Wurth Samples L2 2.2 mH WE−PD−S 7447785002 Wurth Samples RA1 10K POT PVG3A_POT PVG3A103C01R00 490−2644−1−ND RA3 10K POT PVG3A_POT PVG3A103C01R00 490−2644−1−ND RA2 500K POT PVG3A_POT PVG3A504C01R00 490−2657−1−ND RA4 500K POT PVG3A_POT PVG3A504C01R00 490−2657−1−ND REN1 10.0 K 603 CRCW060310K0FKEA 541−10.0KHCT−ND REN2 10.0 K 603 CRCW060310K0FKEA 541−10.0KHCT−ND RFB1 220 K 603 CRCW0603220KFKEA 541−220KHCT−ND RFB3 220 K 603 CRCW0603220KFKEA 541−220KHCT−ND RFB2 46.4 K 603 CRCW060346K4FKEA 541−46.4KHCT−ND RFB4 46.4 K 603 CRCW060346K4FKEA 541−46.4KHCT−ND RPOR1 510 K 603 CRCW0603510KFKEA 541−510KHCT−ND RSYNC1 2.00 M 603 CRCW06032M00FKEA 541−2.00MHCT−ND TP1 VIN+ TP TP2 VIN− TP TP3 VOUT1+ TP TP4 VOUT1− TP TP5 VOUT2+ TP TP6 VOUT2− TP TP7 VIN TP TP8 VOUT1 TP TP9 VOUT2 TP TP10 EN1 TP TP11 EN2 TP TP12 POR TP TP13 SYNC TP TP14 GND TP TP15 GND TP U1 NCV896530 10PINDFNP5 http://onsemi.com 6 NCV896530EVB 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. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: [email protected] N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5817−1050 http://onsemi.com 7 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative EVBUM2214/D