* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download NCV885300EVB NCV885300 Evaluation Board User's Manual •
Utility frequency wikipedia , lookup
Audio power wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Power engineering wikipedia , lookup
Three-phase electric power wikipedia , lookup
History of electric power transmission wikipedia , lookup
Electrical substation wikipedia , lookup
Power inverter wikipedia , lookup
Electrical ballast wikipedia , lookup
Pulse-width modulation wikipedia , lookup
Current source wikipedia , lookup
Stray voltage wikipedia , lookup
Surge protector wikipedia , lookup
Power MOSFET wikipedia , lookup
Variable-frequency drive wikipedia , lookup
Schmitt trigger wikipedia , lookup
Voltage optimisation wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Voltage regulator wikipedia , lookup
Alternating current wikipedia , lookup
Mains electricity wikipedia , lookup
Buck converter wikipedia , lookup
NCV885300EVB NCV885300 Evaluation Board User's Manual http://onsemi.com EVAL BOARD USER’S MANUAL Description Key Features • • • • • • • • The NCV885300 evaluation board provides a convenient way to evaluate and integrate a complete high-efficiency non-synchronous buck converter design. No additional components are required, other than dc supplies for the input voltage and enable pin. The board can also be connected to an external clock source to synchronize the switching frequency. The power good signal can be pulled up externally with the PG+ pin. The board is configured for a 5.0 V output with a 340 kHz switching frequency and a 3 A current limit, intended for applications requiring 2 A of current. Modifying the NCV885300 evaluation board for different output voltage, switching frequency, or current limit is straightforward, requiring minimal component changes. 5.0 V Output Voltage 340 kHz Switching Frequency 2.0 A Current Limit Power Good Signal Wide Input Voltage of 6.0 V to 36 V Regulated through Load Dump Conditions External Clock Synchronization up to 500 kHz Automotive Grade Figure 1. NCV885300EVB Board Picture www.BDTIC.com/ON/ © Semiconductor Components Industries, LLC, 2012 July, 2012 − Rev. 0 1 Publication Order Number EVBUM2129/D NCV885300EVB Table 1. EVALUATION BOARD TERMINALS Pin Name VIN Function Positive dc input voltage VOUT Regulated dc output voltage GND Common dc return EN/SYNC Enable input and external clock synchronization input PG Digital power good output PG+ Power good pull-up. Use this pin only when pulling-up PG to an external voltage source. Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) Value Units Dc supply voltage (VIN) -0.3 to 36 V Dc supply voltage (EN/SYNC, PG, PG+) -0.3 to 6.0 V Rating 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, 6.0 V ≤ VIN ≤ 36 V, VEN/SYNC = 5.0 V, 0 ≤ IOUT ≤ 2.0 A, unless otherwise specified) Characteristics Conditions Typical Value Units 5.0 V 2 % Regulation Output Voltage Voltage Accuracy Line Regulation IOUT = 1.0 A 0.04 % Load Regulation VIN = 13.2 V 0.12 % Switching Frequency 340 kHz Soft-start Time 2.0 ms 270 to 500 kHz Cycle-by-Cycle Current Limit 3.33 A Over Current Protection Threshold 5.0 A VIN decreasing 3.1 V TJ rising 170 °C Switching SYNC Frequency Range Current Limit Protections Input Undervoltage Lockout (UVLO) Thermal Shutdown www.BDTIC.com/ON/ http://onsemi.com 2 NCV885300EVB PG PG_POS R6 VOUT R1 GND EN/SYNC C5 6800p EN/SYNC VIN OPEN U1 1 PG 10k 2 COMP C6 470p R3 3 4 FB PG EN/SYNC ISNS COMP R5 8.06k GDRV GND FB 885300 8.06k VIN C3225X7S1H106K C3 C2 10uF 10uF C4 10uF VIN ISNS 7 6 5 C1 0.1uF R2 30m 8 GND NTTFS5116PL Q1 L1 GDRV VSW VOUT 15 uH XAL5050-153MEB GND C8 VOUT C7 100 uF 0.1uF B45197A2107K409 D1 MBRA340T3 R4 GND 42.2k Figure 2. NCV885300EVB Board Schematic Operational Guidelines 4. Optionally, for external clock synchronization, connect a pulse source between EN/SYNC and GND. The high state level should be within the 2.0 V to 5.5 V range, and the low state level within the 0.0 V to 0.8 V range, with a frequency within the 270 kHz to 500 kHz range. 1. Connect a dc input voltage, within the 6.0 V to 36 V range, between VIN and GND 2. Connect a load between VOUT and GND 3. Connect a dc enable voltage, within the 2.0 V to 5.5 V range, between EN/SYNC and GND VIN IOUT ZOUT VEN VSYNC Figure 3. NCV885300EVB Board Connections www.BDTIC.com/ON/ http://onsemi.com 3 NCV885300EVB Power Good Operation • The Power Good pin (PG) allows you to digitally • 1. Remove R1 from the board. 2. Populate R6 with a 10 kW resistor. 3. Connect the a voltage source between PG+ and GND (please see the Absolute Maximum Ratings table for more information). 4. PG is now ready to digitally monitor VOUT using an external pull-up. monitor the output voltage. When VOUT is above 90% of the expected value, the PG signal is in a high state. By default, PG is pulled high to VOUT through a 10 kW resistor. Optional: To pull the PG pin high using a signal other than VOUT, please make the following board modifications: TYPICAL PERFORMANCE Regulation 0.2000% 0.1500% Line Regulation (%) 0.1000% 0.0500% Iout = 100 mA Iout = 500 mA 0.0000% 0.0 5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0 -0.0500% Iout = 1.0 A Iout = 2.0 A -0.1000% -0.1500% -0.2000% Input Voltage (V) Figure 4. Line Regulation for 340 kHz and a 5.0 V Output www.BDTIC.com/ON/ http://onsemi.com 4 NCV885300EVB 0.2000% 0.1500% Load Regulation (%) 0.1000% 0.0500% 0.0000% 0.001 VIN = 6.0 V 0.01 0.1 1 10 -0.0500% -0.1000% -0.1500% -0.2000% Output Current (A) Figure 5. Load Regulation for 340 kHz and a 5.0 V Output www.BDTIC.com/ON/ http://onsemi.com 5 VIN = 13.2 V VIN = 36.0 V www.BDTIC.com/ON/ http://onsemi.com 6 VIN GND 10uF C4 10uF C3 VOUT B45197A2107K409 0.1uF 100 uF C7 C8 VOU T GND 10uF C2 VIN 30m R2 ISNS Q1 NTTFS5116PL 0.1uF C1 C3225X7S1H106K L1 VSW MBRA340T3 D1 XAL5050-153MEB 15 uH 8 7 GDRV 6 GND 5 R4 VIN ISNS GDRV GND 42.2k U1 PG 1 EN/SYNC 2 COMP 3 4 885300 FB PG FB 8.06k R5 PG R6 OPEN R1 10k COMP 470p C6 VOUT 6800p C5 EN/S PG_P EN/SYNC GND R3 8.06k NCV885300EVB SCHEMATIC Figure 6. Evaluation Board Schematic NCV885300EVB PCB LAYOUT Figure 7. Top View Figure 8. Bottom View www.BDTIC.com/ON/ http://onsemi.com 7 NCV885300EVB Table 4. BILL OF MATERIALS Reference Part # Manufacturer Description Package U1 Value NCV885300 ON Semiconductor Integrated circuit SOIC-8 Q1 NTTFS5116PL ON Semiconductor Power MOSFET, P-Channel WDFN8 D1 MBRA340T3G ON Semiconductor Diode, Schottky, 40 V, 3A SMA L1 15 mH XAL5050-153MEB Coilcraft Shielded Power Inductor 5 mm x 5 mm R1 10.0 kW CRCW060310K0FKEA Vishay/Dale Resistor, 1% 0603 R2 0.03 W WSL0805R0300FEA18 Vishay/Dale Resistor, 1% 0805 R3, R5 8.06 kW CRCW06038K06FKEA Vishay/Dale Resistor, 1% 0603 R4 42.2 kW CRCW060342K2FKEA Vishay/Dale Resistor, 1% 0603 C1 0.1 mF GCM188R71H104KA57D Murata Capacitor, 50 V, X7R 0603 C2, C3, C4 10 mF GRM32DF51H106ZA01L Murata Capacitor, 50 V, Y5V 1210 C5 6800 pF EMK107SD682JA-T Taiyo Yuden Capacitor, 16 V 0603 C6 470 pF 06033A471JAT2A AVX Capacitor, 25 V, NP0 0603 C7 100 mF B45197A2107K409 Kemet Capacitor, 10 V 2917 C8 0.1 C0603C104K8RACTU Kemet Capacitor, 10 V, X7R 0603 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 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative www.BDTIC.com/ON/ http://onsemi.com 8 EVBUM2129/D