ncp391 ON Semiconductor, ncp391 Datasheet
ncp391
Available stocks
Related parts for ncp391
ncp391 Summary of contents
Page 1
... Positive Overvoltage Protection Controller with Internal Low R ON The NCP391 is able to disconnect the systems from its output pin when wrong input operating conditions are detected. The system is positive overvoltage protected up to +28 V. This device uses an internal NMOS and therefore, no external device is necessary, reducing the system cost and the PCB area of the application board ...
Page 2
... Wall Adapter − AC/DC − USB ENABLE/ Microprocessor Figure 1. Typical Application Circuit 1 INPUT 2 EN Block EN 6 Figure 2. Functional Block Diagram NCP391 CC/CV OUT 3 Charger or 4 System FLAG GND mP 0 Gate Driver V REF Charge Pump UVLO Control OVLO ...
Page 3
PIN FUNCTION DESCRIPTION Pin No. Symbol Function INPUT Input Voltage Pins. These pins are connected to the Wall Adapoter (AC−DC, Vbus ..). low A1, A2 ESR ceramic capacitor, or larger, must be connected ...
Page 4
... ELECTRICAL CHARACTERISTICS unless otherwise noted.) Characteristic Input Voltage Range Undervoltage Lockout Threshold (Note 4) NCP391FCAL Undervoltage Lockout Hysteresis Overvoltage Lockout Threshold (Note 4) NCP391FCAL Overvoltage Lockout Hysteresis NCP391FCAL V versus V Resistance in out Supply Quiescent Current UVLO Supply Current MOSFET Leakage FLAG Output Low Voltage ...
Page 5
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 ...
Page 6
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 = ...
Page 7
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 ...
Page 8
... VOLTAGE DETECTION Figure 16. Simplified Diagram VOLTAGE DETECTION Figure 17. Simplified Diagram overtaking undervoltage UVLO (Figure 3). The NCP391 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 ...
Page 9
out FLAG = Low Reset Timer V < UVLO > OVLO out FLAG = Low Timer Count OVLO > V > UVLO in Timer Check Reset Timer V < UVLO ...
Page 10
... Please refer to Figure 19 to see the IEC 61000−4−2 electrostatic discharge waveform. pin from out is higher than OVLO. Figure 19. Electrostatic Discharge Waveform PCB Recommendations start The NCP391 integrates rated NMOSFET, and the PCB rules must be respected to properly evacuate the heat out of the silicon. 200 180 160 140 NMOS ...
Page 11
... NCP391FCALT2G †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 NCP391 can be available in several undervoltage and overvoltage thresholds versions. Part number is designated as follows: NCP391FCxxT1G a b Code ...
Page 12
... CONTROLLING DIMENSION: MILLIMETERS. 3. COPLANARITY APPLIES TO SPHERICAL CROWNS OF SOLDER BALLS. MILLIMETERS DIM MIN MAX A 0.50 0.56 A1 0.17 0.23 A2 0.33 0.39 b 0.24 0.29 D 1.31 BSC E 1.04 BSC eD 0.40 BSC eE 0.60 BSC RECOMMENDED SOLDERING FOOTPRINT* 0.40 0.60 6X 0.26 DIMENSIONS: MILLIMETERS ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your loca Sales Representative NCP391/D ...