NCV890104MWGEVB

NCV890104GEVB NCV890104 Evaluation Board User'sManual Description The NCV890104 is a fixed-frequency, monolithic, Buck switching regulator intended for Automotive, battery-connected applications that must operate with up to a 36 V input supply. The regulator is suitable for systems with low noise and small form factor requirements often encountered in automotive driver information systems. The NCV890104 is capable of converting the typical 4.5 V to 18 V automotive input voltage range to outputs as low as 3.3 V at a constant switching frequency above the sensitive AM band, eliminating the need for costly filters and EMI countermeasures. A Reset pin signals when the output is in regulation, and a pin is provided to adjust the delay before the RSTB signal goes high. The NCV890104 also provides several protection features expected in Automotive power supply systems such as current limit, short circuit protection, and thermal shutdown. In addition, the high switching frequency produces low output voltage ripple even when using small inductor values and an all-ceramic output filter capacitor − forming a space-efficient switching regulator solution. http://onsemi.com EVAL BOARD USER’S MANUAL Key Features • • • • • • • • • • • • • • • • • • Internal N-channel Power Switch Low VIN Operation Down to 4.5 V High VIN Operation to 36 V Withstands Load Dump to 40 V 2 MHz Free-running Switching Frequency Adjustable Spread Spectrum Reset with Adjustable Delay Logic level Enable Input Can be Directly Tied to Battery 1.4 A (min) Cycle-by-Cycle Peak Current Limit Short Circuit Protection enhanced by Frequency Foldback ±1.75% Output Voltage Tolerance Output Voltage Adjustable Down to 0.8 V 1.4 Millisecond Internal Soft-Start Thermal Shutdown (TSD) Low Shutdown Current NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable Wettable Flanks DFN (Pin Edge Plating) These Devices are Pb-Free and are RoHS Compliant Typical Applications • Audio, Infotainment, Safety – Vision Systems, Instrumentation Figure 1. NCV890104 Evaluation Board © Semiconductor Components Industries, LLC, 2014 May, 2014 − Rev. 1 1 Publication Order Number: EVBUM2230/D NCV890104GEVB CDRV VIN VIN DBST SW L1 3V Reg CBST DRV BST Oscillator PWM LOGIC ON OFF RSTB DELAY + GND CDELAY + + − Reset Delay COMP Clamp TSD FB + − RSTB Soft−Start RESET + COMP Voltages Monitors + − Enable DFW EN RCOMP + CCOMP RMOD RDEPTH RDEPTH Spread Spectrum RMOD Figure 2. NCV890104 Block Diagram TYPICAL APPLICATION CDRV DBST NCV890104 L1 VIN CIN 1 VIN SW 12 2 DRV BST 11 CBST DFW RSTB 3 RSTB 4 GND VOUT COUT RFB1 DELAY 10 CDELAY FB 9 EN 5 EN COMP 8 RCOMP 6 RDEPTH RMOD 7 RDEPTH RMOD CCOMP Figure 3. Typical Application http://onsemi.com 2 RFB2 VOUT COUT NCV890104GEVB Table 1. EVALUATION BOARD TERMINALS Pin Name Function VIN Positive dc Input Voltage GND Common dc Return VOUT Positive dc Output Voltage EN RST3B Master Enable Input Reset with Adjustable Delay Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) Rating Dc Supply Voltage (VIN, EN) Dc Supply Voltage (RSTB) Storage Temperature Range Value Unit −0.3 to 40 V −0.3 to 6 V −55 to +150 °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 Characteristic Conditions Typical Value Unit REGULATION 5.0 V Line Regulation (VOUT) IOUT = 1.0 A 0.1 % Load Regulation (VOUT) VIN = 13.2 V 0.1 % Switching Frequency 2.0 MHz Soft-start Time 1.4 ms EN = 5 V 2.35 A VIN Decreasing 3.4 V TJ Rising 170 °C Output Voltage (VOUT) SWITCHING CURRENT LIMIT Peak Current Limit (VOUT) PROTECTIONS Input Undervoltage Lockout (UVLO) Thermal Shutdown 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 3 VIN L2 4.7uH GND RDEP EN KLV1 is shorted with copper in the PCB layout. 10K 0603 DEV_GNDRRDEP RDEP EN KLV1 10K 0603 RRSTB GND VOUT GND RSTB 1 RSTB NCV890104 DRV 6 5 4 3 RDEPTH EN GND RESET FB 8 COMP 9 10 DLY FB 0.47uF 0603 DLY L1 4.7uH CSNB OPEN 0603 10V/X7R DFW MBRS1540T3G XAL4030−472 Figure 4. NCV890104GEVB Evaluation Board Schematic DEV_GND RFB2 31.6 0603 RFB1 100 0603 Coilcraft XAL4030−472ME 0603 C0G / 50V DBST BST BAS16HT1G CDLY DEV_GND CBST 0.1uF 0603 CDRV 0.1uF 0603 10V/X7R SW RSNB OPEN 0603 ZFB1 COMP 4.7nF 0603 RCOMP 50V 7 RMODRRMOD DEV_GND 6.98k RMOD 0603 10K 0603 CCOMP RMOD 330pF COMP FB DELAY 1 12 SW VIN SW CVIN2 NCV890104 1uF 2 11 BST 0805 BST DRV 50V/X7R CFLT2 4.7uF 1210 50V/X7R VIN CVIN1 4.7uF 1210 50V/X7R M_PD_IND CFLT1 4.7uF 1210 50V/X7R VSUP GND 4 2 http://onsemi.com 13 Coilcraft XAL7030−472ME COUT1 10uF 1206 X7R/10V COUT2 10uF 1206 X7R/10V VOUT RMIN1 OPEN 1206 RMIN2 OPEN 1206 GND GND GND VOUT NCV890104GEVB NCV890104GEVB OPERATIONAL GUIDELINES 1. Connect a dc input voltage, within the 6.0 V to 36 V range, between VIN and GND. 2. Connect a dc enable voltage, within the 2.0 V to 36 V range, between EN and GND. This will power up the switcher. The VOUT signal should be 3.3 V. 3. Add a load to VOUT – up to 1.0 A. Figure 5. NCV890104 Board Connections ADDITIONAL GUIDELINES Output Voltage Selection Some common setups are listed below: The voltage output for the switcher is adjustable and can be set with a resistor divider. The FB reference for the switcher is 0.8 V. VOUT RUPPER FB = 0.8 V Desired Output (V) VREF (V) RUPPER (kW, 1%) RLOWER (kW, 1%) 1.2 0.8 5.11 10.0 1.5 0.8 8.87 10.0 1.8 0.8 12.7 10.0 2.5 0.8 21.5 10.0 3.3 0.8 31.6 10.0 5.0 0.8 52.3 10.0 Spread Spectrum In SMPS devices, switching translates to higher efficiency. Unfortunately, the switching leads to a much noisier EMI profile. We can greatly decrease some of the radiated emissions with some spread spectrum techniques. Spread spectrum is used to reduce the peak electromagnetic emissions of a switching regulator. RLOWER Use the following equation: R UPPER + R LOWER V OUT*V FB V FB http://onsemi.com 5 NCV890104GEVB Time Domain The modulation depth and modulation frequency are each set by an external resistor to GND. The modulation frequency can be set from 5 kHz up to 50 kHz using a resistor from the RMOD pin to GND. The modulation depth can be set from 3% up to 30% of the nominal switching frequency using a resistor from the RDEPTH pin to GND. Please see the curves below for typical values: Frequency Domain Unmodulated V 52 fc 3fc 5fc 7fc 9fc MODULATION FREQUENCY (kHz) t V t fc 3fc 5fc 7fc 9fc The spread spectrum used in the NCV890104 is an “up-spread” technique, meaning the switching frequency is spread upward from the 2.0 MHz base frequency. For example, a 5 % spread means that the switching frequency is swept (spread) from 2.0 MHz up to 2.1 MHz in a linear fashion – this is called the modulation depth. The rate at which this spread takes place is called the modulation frequency. For example, a 10 kHz modulation frequency means that the frequency is swept from 2.0 MHz to 2.1 MHz in 50 ms and then back down from 2.1 MHz to 2.0 MHz in 50 ms. 47 42 37 32 27 22 17 12 7 2 0 10 20 30 RMOD, (kW) 40 50 60 Figure 6. Modulation Frequency vs. RMOD Value MODULATION DEPTH (%FSW) 35 30 25 20 15 10 5 0 0 10 20 30 RDEPTH, (kW) 40 50 60 Figure 7. Modulation Depth vs. RDEPTH Value Spread spectrum is automatically turned off when there is a short to GND or an open circuit on either the RMOD pin or the RDEPTH pin. Please be sure that the ROSC pin is an open circuit when using spread spectrum. http://onsemi.com 6 NCV890104GEVB TYPICAL PERFORMANCE Efficiency NCV890104 Efficiency − 3.3 V 100% 90% 80% Efficiency 70% 60% 50% 40% 30% VIN = 6.0 V VIN = 13.2 V 20% VIN = 28.0 V 10% 0% 0 0.2 0.4 0.6 0.8 1.0 1.2 Output Current (A) Figure 8. Efficiency with a 3.3 V Output NCV890104 Efficiency − 5.0 V 100% 90% 80% Efficiency 70% 60% 50% 40% 30% VIN = 6.0 V 20% VIN = 13.2 V VIN = 28.0 V 10% 0% 0 0.2 0.4 0.6 0.8 Output Current (A) Figure 9. Efficiency with a 5.0 V Output http://onsemi.com 7 1.0 1.2 NCV890104GEVB Line Regulation NCV890104 − Line Regulation − 3.3 V Line Regulation (% of VOUT) 1.00% 0.50% 0.00% −0.50% IOUT = 100 mA IOUT = 500 mA IOUT = 1.0 A −1.00% 0.00 5.00 10.00 15.00 20.00 25.00 30.00 Input Voltage (V) Figure 10. Line Regulation for a 3.3 V Output NCV890104 − Line Regulation − 5.0 V Line Regulation (% of VOUT) 1.00% 0.50% 0.00% −0.50% IOUT = 100 mA IOUT = 500 mA IOUT = 1.0 A −1.00% 0.00 5.00 10.00 15.00 20.00 Input Voltage (V) Figure 11. Line Regulation for a 5.0 V Output http://onsemi.com 8 25.00 30.00 NCV890104GEVB Load Regulation NCV890104 − Load Regulation − 3.3 V 0.04% VIN = 6.0 V Load Regulation (% of VOUT) 0.02% VIN = 13.2 V VIN = 28.0 V 0.00% −0.02% −0.04% −0.06% −0.08% 0 0.2 0.4 0.6 0.8 1.0 1.2 Output Current (A) Figure 12. Load Regulation with a 3.3 V Output NCV890104 − Load Regulation − 5.0 V 0.02% VIN = 6.0 V Load Regulation (% of VOUT) 0.00% VIN = 13.2 V VIN = 28.0 V −0.02% −0.04% −0.06% −0.08% −0.10% 0 0.2 0.4 0.6 0.8 Output Current (A) Figure 13. Load Regulation with a 5.0 V Output http://onsemi.com 9 1.0 1.2 VIN L2 4.7uH GND RDEP EN KLV1 is shorted with copper in the PCB layout. 10K 0603 DEV_GNDRRDEP RDEP EN 10K 0603 RRSTB KLV1 VOUT GND RSTB GND RSTB NCV890104 DRV 6 5 4 3 RDEPTH EN GND RESET FB 8 COMP 9 FB 0.47uF 0603 DLY L1 4.7uH CSNB OPEN 0603 10V/X7R DFW MBRS1540T3G XAL4030−472 DEV_GND RFB2 31.6 0603 RFB1 100 0603 Coilcraft XAL4030−472ME 0603 C0G / 50V DBST BST BAS16HT1G CDLY DEV_GND CBST 0.1uF 0603 CDRV 0.1uF 0603 10V/X7R SW RSNB OPEN 0603 ZFB1 COMP 4.7nF 0603 RCOMP 50V 7 RMODRRMOD DEV_GND 6.98k RMOD 0603 10K 0603 CCOMP RMOD 330pF COMP FB DELAY 10 DLY 1 12 SW VIN SW CVIN2 NCV890104 1uF 2 11 BST 0805 BST DRV 50V/X7R CFLT2 4.7uF 1210 50V/X7R VIN CVIN1 4.7uF 1210 50V/X7R M_PD_IND CFLT1 4.7uF 1210 50V/X7R VSUP GND 10 1 http://onsemi.com 2 Figure 14. Schematic 13 Coilcraft XAL7030−472ME COUT1 10uF 1206 X7R/10V COUT2 10uF 1206 X7R/10V VOUT RMIN1 OPEN 1206 RMIN2 OPEN 1206 GND GND GND VOUT NCV890104GEVB SCHEMATIC NCV890104GEVB PCB LAYOUT Figure 15. Top View Figure 16. Bottom View http://onsemi.com 11 NCV890104GEVB BILL OF MATERIALS Table 4. BILL OF MATERIALS Manufacturer Manufacturer’s Part Number Substitution Allowed Kemet C0603C104K8RACTU Yes 603 Murata Electronics North America GCM1885C1H331JA16D Yes 10% 603 Murata Electronics North America GCM188R71E474KA64D Yes 4.7 mF 10% 1210 Murata Electronics North America GRM32ER71H475KA88L Yes CAP CER 10 mF 10 V X7R 1206 10 mF 10% 1206 Murata Electronics North America GRM31CR71A106KA01L Yes 1 CAP CER 1.0 mF 50 V X5R 0805 1.0 mF 10% 805 Murata Electronics North America UMK212BJ105KG-T Yes DBST 1 DIODE SWITCH 200 mA 75 V SOD323 75 V/0.2 A N/A SOD_323 ON Semiconductor BAS16HT1G No DFW 1 DIODE SCHOTTKY 1.5 A 40 V SMB 40 V/1.5 A N/A SMB_DIODE ON Semiconductor MBRS1540T1G No L1 1 INDUCTOR POWER 4.7 mH 4.5 A SMD 4.7 mH 4.5A XAL4030-472 Coilcraft XAL4030-472ME No L2* 1 RES 0.0 W 1/4 W JUMP 1206 SMD 0W 5% 1206 Yageo RC1206JR-070RL Yes RCOMP 1 RES 6.98 kW 1/10 W 1% 0603 SMD 6.98 kW 1% 603 Vishay/Dale CRCW06036K98FKEA Yes RFB1 1 RES 100 W 1/10 W 1% 0603 SMD 100 W 1% 603 Vishay/Dale CRCW0603100RFKEA Yes RFB2 1 RES 31.6 W 1/10W 1% 0603 SMD 31.6 W 1% 603 Vishay/Dale CRCW060331R6FKEA Yes RRDEP, RRMOD, RRSTB 3 RES 10.0 kW 1/10 W 1% 0603 SMD 10.0 kW 1% 603 Vishay/Dale CRCW060310K0FKEA Yes ZFB1 1 CAP CER 4700 pF 50 V 10% X7R 0603 4,700 pF 10% 603 Murata Electronics North America GRM188R71H472KA01D Yes CSNB 1 Do Not Populate 603 Yes RMIN1, RMIN2 2 Do Not Populate 1206 Yes RSNB 1 Do Not Populate 603 Yes BST, COMP, DLY, FB, RDEP, RMOD, SW 7 CIRCUIT PIN PRNTD .020″D .425″L Do Not Populate N/A TPA Mill-Max Manufacturing Corp. 3128-2-00-15-00-00-08-0 Yes GND1, GND2, VIN, VOUT 4 CONN JACK BANANA UNINS PANEL MOU N/A N/A BANANA Emerson Network Power Connectivity Soultions 108-0740-001 Yes Reference Designator(s) Qty. Description Value Tolerance Footprint CBST, CDRV 2 CAP .10 mF 10 V CERAMIC X7R 0603 0.1 mF 10% 603 CCOMP 1 CAP CER 330 pF 50 V C0G 0603 330 pF 10% CDLY 1 CAP CER 0.47 mF 25 V 10% X7R 0603 0.47 mF CFLT1, CFLT2, CVIN1 3 CAP CER 4.7 mF 50 V 10% X7R 1210 COUT1, COUT2 2 CVIN2 http://onsemi.com 12 NCV890104GEVB Table 4. BILL OF MATERIALS (continued) Manufacturer’s Part Number Substitution Allowed Mill-Max Manufacturing Corp. 2501-2-00-44-00-00-07-0 Yes TP Vector Electronics K24C/M Yes 12PINDFN4×4p65 ON Semiconductor NCV890104MWR2G No Reference Designator(s) Qty. Description Value Tolerance Footprint Manufacturer GND3−GND6 4 TERM SOLDER TURRET .219″ .109″L N/A N/A TURRET EN, RSTB 2 PIN INBOARD .042″ HOLE 1000/PKG N/A N/A NCV890104 1 1.2 A 2 MHz Automotive Buck Switching Regulator NCV890104 N/A *L2 is a placeholder footprint for an optional input inductor filter component. Boards are shipped with a shorting jumper installed to complete the input path. 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