NCP348 ONSEMI [ON Semiconductor], NCP348 Datasheet
NCP348
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NCP348 Summary of contents
Page 1
... Protection Controller with Internal Low R ON and Status FLAG The NCP348 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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... IN OUT FLAG ENABLE / 2 Microprocessor 0 INPUT Core ESD Negative Protection Protection V REG V REF NCP348 V V Bat Bat D3 7011X/SM NCP1835B 3 CFLG 2 FAULT 4.7 mF ISEL Bat 270 Figure 1. Typical Application Circuit Output Impedance = 200 k Delay ...
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... Human Body Model, 100 pF discharged through a 1.5 kW resistor following specification JESD22/A114. 3. Machine Model, 200 pF discharged through all pins following specification JESD22/A115. NCP348 Description power supply when the input voltage is under the UVLO in Rating http://onsemi.com 3 must be added ...
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... 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. NCP348 (Min/Max limits values (−40°C < T < +85°C) and V A Symbol ...
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... V 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 NCP348 TIMING DIAGRAMS <OVLO out V − DS(on) V − DS(on) FLAG Figure 4. Shutdown on Overvoltage Detection FLAG Figure 6. FLAG Response with http://onsemi.com ...
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... Ch3 in out Figure 9. FLAG Going Up Delay V = Ch3, FLAG = Ch2 out Figure 11. Initial Overvoltage Delay V = Ch1 Ch2, FLAG = Ch3 in out NCP348 Figure 8. Output Turn Off Time V = Ch1 Figure 10. Alert Delay V = Ch1, FLAG = Ch3 out Figure 12. Disable Time EN = Ch1, V out http://onsemi.com ...
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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) NCP348 = 100 mF, out http://onsemi.com 7 Figure 14. Output Short Circuit ...
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... NCP348 VOLTAGE DETECTION Figure 16. Simplified Diagram VOLTAGE DETECTION Figure 17. Simplified Diagram overtaking undervoltage UVLO (Figure 3). The NCP348 provides a FLAG output, which alerts the system that a fault NMOS FET has occurred additional delay, regarding DS(on) available output (Figure 3) is added between output signal rising up and to FLAG signal rising up ...
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... NCP348 out FLAG = Low Reset Timer V < UVLO > OVLO out FLAG = Low Timer Count OVLO > V > UVLO in Timer Check Reset Timer V < UVLO > OVLO Check V in FLAG = Low Timer Count Check Open out V < ...
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... PCB rules must be respected to properly evacuate the heat out of the silicon. The PAD1 is internally isolated from the active silicon and should preferably be connected to ground. The PAD2 of the NCP348 package is connected to the internal NMOS drain and can be used to increase the heat transfer if necessary from an applications standpoint. ...
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... R2 100 k 100 k NCP348 1 oz Sim 2 oz Sim 2 ) OUTPUT OUT OUT 5 IN NCP348 8 100 X7R 0805 not necessary FLAG EN FLAG GND 2 Figure 22. Demo Board Schematic http://onsemi.com Figure 21. Demo Board Layout C2 FLAG Power ...
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... A3 0.20 REF b 0.20 0.25 0.30 D 2.50 BSC D2 0.97 1.08 1.18 D3 0.57 0.68 0.78 e 0.50 BSC E 2.00 BSC E2 0.80 0.90 1.00 G 3.75 BSC G1 3.50 BSC K 0.20 −−− −−− L 0.20 0.30 0.40 SOLDERING FOOTPRINT* 2.50 10X 0.58 0.95 10X 1.13 0.60 0.50 PITCH DIMENSIONS: MILLIMETERS ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP348/D ...