NCV887701BSTGEVB

NCV887701BSTGEVB NCV887701 Automotive Grade High-Frequency Start-Stop Boost Controller Evaluation Board User'sManual http://onsemi.com EVAL BOARD USER’S MANUAL Description Key Features • • • • • • • This NCV887701 evaluation board provides a convenient way to evaluate a high frequency boost controller designed to supply a minimum output voltage during Start-Stop vehicle battery voltage sags. The unit is in low Iq sleep-mode under normal battery operating condition and wakes-up when the monitored voltage drops below 7.3 V and begin regulating once 6.8 V is reached. Switching frequency is set to 440 kHz with a user selectable ROSC resistor. The evaluation board is rated 6.8 V / 3.6 A at a 2.6 V input voltage. Operation below 2.6 V is possible if output current is reduced. • • Automatic Enable below 7.3 V Disable Override Function Boost Operation at 6.8 V 440 kHz Switching Frequency Input Undervoltage Lockout Wide Input Voltage of 2.6 V to 45 V Low Quiescent Current in Sleep Mode (< 12 mA Typical) Cycle-by-Cycle Current Limit Protection Automotive Grade Figure 1. NCV887701 Start−Stop Evaluation Board © Semiconductor Components Industries, LLC, 2014 February, 2014 − Rev. 0 1 Publication Order Number: EVBUM2224/D NCV887701BSTGEVB Table 1. EVALUATION BOARD TERMINALS Terminal Function VIN (large post) Positive DC input voltage (power) GND (large post) Common DC return (power) VOUT (large post) Regulated DC output voltage (power) GND (small post) Common DC return, monitoring point VC (small post) Voltage compensation, monitoring point VOUT (small post) Regulated DC output voltage, monitoring point VDRV (small post) Driving voltage, monitoring point DISB (small post) Disable override input, monitoring point ISNS (small post) Current sense resistor voltage, monitoring point VG (small post) MOSFET gate voltage, monitoring point SW (small post) MOSFET drain voltage, monitoring point Table 2. ABSOLUTE MAXIMUM RATINGS (Voltages are with respect to GND) Rating Value Unit DC supply voltage (VIN) -0.3 to 45 V DC supply voltage (EN, SYNC) -0.3 to 6 V DC Voltage (DISB) -0.3 to 6 V Junction Temperature -40 to 150 °C Ambient temperature (Evaluation Board) -40 to 105 °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 CHARACTERISTICS (TA = 25°C, 2.6 V ≤ VIN ≤ Vout_LED, VDISB = 5 V, unless otherwise specified) Conditions Typical Value Unit ROSC = 10.7 kW 440 kHz ROSC (refer to datasheet) 170-500 kHz - 18 A - 0.83 - VOUT Undervoltage Lockout (UVLO) VOUT falling 3.8 V Thermal Shutdown TA increasing 170 °C Characteristics Switching Switching Frequency User Selectable Frequency Range Current Limit Cycle-by-cycle Current Limit (FET) Protections Maximum Duty Cycle 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 NCV887701BSTGEVB Operational Guidelines 3. Connect a 3.6 A constant current load on the output. 4. Decrease the DC input voltage until the PCB VIN voltage is 5.5 V ±0.5 V. 5. Set the DISB control signal to a TTL high state (i.e. 5 V). 6. Verify that the unit is regulating at VOUT = 6.8 V. 7. Reduce the DC input voltage until the PCB VIN = 2.6 V. Verify that the unit is regulating at VOUT = 6.8 V. The evaluation board is rated to operate under full load for input voltage as low as 2.6 V at the input terminal under full power (less if output current is reduced). Start-Stop applications use reverse battery protection diodes in front of the boost converter (Figure 2), so the input source can operate down to 2.6 V plus a diode drop (i.e ∼3 V). Notes: 1. The IC UVLO (undervoltage lockout) is 4.25 V for VOUT rising, 3.8 V for VOUT falling (0.45 V hysteresis). 2. Limit time spent with the power supply operating at minimum input voltage (equivalent to VIN = 2.6 V) to avoid overheating the power semiconductors. Start-Stop Voltage Transient Test: 1. Connect both DC1 and DC2 input power supplies as illustrated in Figure 2. Adjust DC2 so that PCB VIN = 2.6 V for a 3.6 A load. 2. Connect a 3.6 A load on the output. If a load resistor is used, it is recommended to start from a DC1 input voltage of 8.5 − 9.0 V to avoid overstressing the PCB boost diode (D1, rated 4 A). 3. Monitor VOUT. Disconnect supply DC1. VOUT should have a response similar to that of Figure 3. First Time Power-Up: 1. Connect a DC source voltage (15 A capable) set to a voltage of 12 − 13 V as shown in Figure 1. 2. Connect the DISB TTL control signal as shown in Figure 1. The initial DISB state should be set to logic −‘0’. DISB Command (TTL) VOUT GND Reverse Polarity Protection Diode Harness PS2 (30 W capable) DISB VIN 3.6 A Constant Current Load NCV887701 6.8 V / 3.6 A Evaluation Board PS1 (15 A capable) GND GND Figure 2. Evaluation Board Connections http://onsemi.com 3 NCV887701BSTGEVB Typical Performance DC1 is disabled, then re-enabled Figure 3. NCV887701 Evaluation Board Waveforms − DC2 at VIN adjusted to 2.6 V (after reverse polarity protection diode) − VOUT = 6.8 V, IOUT = 3.6 A http://onsemi.com 4 NCV887701BSTGEVB SCHEMATIC Figure 4. NCV887701 Boost 6.8 V / 3.6 A Evaluation Board Schematic http://onsemi.com 5 NCV887701BSTGEVB BILL OF MATERIALS Table 4. BILL OF MATERIALS* Manufacturer’s Part Number Substitution Allowed Murata Electronics North America GCM1885C1H471JA16D Yes 10% TDK Corporation CGA3E2X7R1H333K080AA Yes 1 mF 10% Murata Electronics North America GCM188R71C105KA64D Yes CAP CER 1UF 50V 10% X7R 0805 1.0 mF 10% TDK Corporation CGA4J3X7R1H105K125AB Yes 1 CAP CER 150PF 50V 5% NP0 0603 150 pF 5% Murata Electronics North America GCM1885C1H151JA16D Yes CI1, CO6 2 CAP CER 0.1UF 50V 10% X7R 0805 100 nF 10% Murata Electronics North America GCM21BR71H104KA37L Yes CI2 1 CAP ALUM 220UF 50V 20% SMD 220 mF 20% Chemi−Con EMZA500ADA221MJA0G Yes CI3 1 CAP ALUM 470UF 50V 20% RADIAL 470 mF 20% Panasonic Electronic Components EEU-FC1H471 Yes CO2, CO3, CO4 3 CAP ALUM 100UF 35V 20% SMD 100 mF 20% Nichicon RHS1V101MCN1GS No CO5 1 CAP CER 4.7UF 50V 10% X7R 1210 4.7 mF 10% Murata Electronics North America GCM32ER71H475KA55L Yes CSNB 1 CAP CER 3300PF 50V 5% NP0 0603 3300 pF 5% TDK Corporation CGA3E2C0G1H332J080AA Yes D1 1 40 V, 4.0 A Schottky Rectifier SO8-FL 40 V / 4A N/A ON Semiconductor NRVB440MFST1G No L1 1 INDUCTOR POWER 2.2UH 22A SMD 2.2 mH 20% Vishay Dale IHLP5050FDER2R2M01 No Q1 1 N-Channel Power MOSFET 60V 61A SO-8FL 60 V / 61 A N/A ON Semiconductor NVMFS5844NL No R1 1 RES 3.01K OHM 1/10W 1% 0603 SMD 3.01 KW 1% Vishay Dale CRCW06033K01FKEA Yes R2 1 RES 10.7K OHM 1/10W 1% 0603 SMD 10.7 KW 1% Vishay Dale CRCW060310K7FKEA Yes R3 1 RES 0.0 OHM 1/10W JUMP 0603 SMD 0 Jumper Vishay Dale CRCW06030000Z0EA Yes R4 1 RES 249 OHM 1/10W 1% 0603 SMD 249 W 1% Vishay Dale CRCW0603249RFKEA Yes R6 DNP R7, R8 2 RES 0.022 OHM 1W 5% 1206 SMD 0.022 W 5% Panasonic Electronic Components ERJ-8BWJR022V No RDAMP 1 RES 0.68 OHM 1/10W 1% 0603 SMD 0.68 W 1% Panasonic Electronic Components ERJ-3RQFR68V Yes RSNB 1 RES 5.6 OHM 1/10W 1% 0603 SMD 5.6 W 1% Vishay Dale CRCW06035R60FKEA Yes U1 1 Automotive Non-Sync Boost Controller N/A N/A ON Semiconductor NCV887701 No Reference Designator(s) QTY Description Value Tolerance C1 1 CAP CER 470PF 50V 5% NP0 0603 470 pF 5% C2 1 CAP CER 0.033UF 50V 10% X7R 0603 0.033 mF C3 1 CAP CER 1UF 16V 10% X7R 0603 C4, CO1 2 C5 Manufacturer *All Materials are RoHS Compliant http://onsemi.com 6 NCV887701BSTGEVB PCB LAYOUT Figure 5. Top View Figure 6. Bottom View http://onsemi.com 7 onsemi, , and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent−Marking.pdf. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. The evaluation board/kit (research and development board/kit) (hereinafter the “board”) is not a finished product and is not available for sale to consumers. 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