NCP349 ON Semiconductor, NCP349 Datasheet
NCP349
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NCP349 Summary of contents
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... Positive Overvoltage Protection Controller with Internal Low R ON The NCP349 is able to disconnect the systems from its output pin in case wrong input operating conditions are detected. The system is positive overvoltage protected up to +28 V. Due to this device using internal NMOS, no external device is necessary, reducing the system cost and the PCB area of the application board ...
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... Wall Adapter − AC/DC − USB ENABLE/ Microprocessor Figure 1. Typical Application Circuit 7 INPUT 1 EN Block EN 6 Figure 2. Functional Block Diagram NCP349 CC/CV OUT 5 Charger or 4 OUT System V Bat 3 FLAG 10 k GND Gate Driver V REF Charge Pump Control UVLO ...
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PIN FUNCTION DESCRIPTION Pin No. Symbol Function INPUT Input Voltage Pins. These pins are connected to the Wall Adapoter (AC−DC, Vbus ..). low ESR ceramic capacitor, or larger, must be connected between these pins ...
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... EN Voltage Low EN Leakage Current TIMINGS Startup Delay NCP349MNAE FLAG Going Up Delay NCP349MNAE Output Turn Off Time Alert Delay Disable Time NOTE: Electrical parameters are guaranteed by correlation across the full range of temperature. 4. Additional UVLO and OVLO thresholds ranging from UVLO and from OVLO can be manufactured. Contact your ON Semiconductor representative for availability. (Min/Max limits values (− ...
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UVLO 0.3 V out t start 1.2 V FLAG Figure 3. Startup 1 dis out V − DS(on) 0.3 V FLAG Figure 5. Disable ...
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TYPICAL OPERATING CHARACTERISTICS Figure 7. Startup V = Ch1 Ch3 in out Figure 9. FLAG Going Up Delay V = Ch3, FLAG = Ch2 out Figure 11. Initial Overvoltage Delay V = Ch1 Ch2, FLAG = ...
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TYPICAL OPERATING CHARACTERISTICS Figure 13. Inrush Current with C I charge = 1 A, Output Wall Adaptor Inductance 1 mH Figure 15. Output Short Circuit (Zoom Fig. 14) = 100 mF, out http://onsemi.com 7 Figure 14. Output Short Circuit ...
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... VOLTAGE DETECTION Figure 16. Simplified Diagram VOLTAGE DETECTION Figure 17. Simplified Diagram overtaking undervoltage UVLO (Figure 3). The NCP349 provides a FLAG output, which alerts the system that a fault NMOSFET has occurred DS(on) output (Figure 3) is added between output signal rising up and to FLAG signal rising up ...
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out FLAG = Low Reset Timer V < UVLO > OVLO out FLAG = Low Timer Count OVLO > V > UVLO in Timer Check Reset Timer V < UVLO ...
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... OVLO. Figure 19. Electrostatic Discharge Waveform PCB Recommendations The NCP349 integrates rated NMOSFET, and the PCB rules must be respected to properly evacuate the heat start out of the silicon. The pin 7 (exposed pad) is internally connected to the internal NMOS Drain (Input). This exposed pad must be used to increase heat transfer and must be connected to Pin 1 ...
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... NCP349MNAETBG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. SELECTION GUIDE The NCP349 can be available in several undervoltage and overvoltage thresholds versions. Part number is designated as follows: NCP349MNxxTxG ...
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... DIM MIN MAX A 0.80 1.00 A1 0.00 0.05 A3 0.20 REF b 0.20 0.40 D 1.60 BSC D2 1.10 1.30 E 2.00 BSC E2 0.95 1.15 e 0.50 BSC K 0.20 −−− L 0.15 0.35 L1 −−− 0.10 MOUNTING FOOTPRINT 1.30 6X 2.30 1.15 1 0.50 6X PITCH 0.36 DIMENSIONS: MILLIMETERS ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your loca Sales Representative NCP349/D ...