NCP1397ADR2G ON Semiconductor, NCP1397ADR2G Datasheet
NCP1397ADR2G
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NCP1397ADR2G Summary of contents
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NCP1397A, NCP1397B High Performance Resonant Mode Controller with Integrated High-Voltage Drivers The NCP1397 is a high performance controller that can be utilized in half bridge resonant topologies such as series resonant, parallel resonant and LLC resonant converters. It integrates 600 ...
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R18 PIN FUNCTION DESCRIPTION Pin # Pin Name Function 1 CSS(dis) Soft−Start Discharge 2 Fmax Maximum frequency clamp 3 Ctimer Timer duration 4 Rt Minimum frequency clamp 5 BO Brown−Out 6 FB Feedback 7 DT Deadtime 8 Skip/Disable Skip or ...
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VDD Imin VFB VFB(o ) Vref Rt IDT Imax for Vfb = 5 for Vfb < Vfb(min) VDD Imax VFB = 5 Vdd VDD Vref Itimer1 Itimer2 Fmax Timer + − − ...
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VDD Imin VFB VFB(o ) Vref Vref Rt IDT Imax for Vfb = 5 for Vfb < Vfb_min VDD Imax Vfb = 5 VDD Vref Itimer1 Fmax If FAULT Itimer else 0 ...
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MAXIMUM RATINGS Rating High Voltage bridge pin, pin 14 Floating supply voltage, ground referenced High side output voltage Low side output voltage Allowable output slew rate Power Supply voltage, pin 12 Maximum voltage, all pins (except pin 11 and 10) ...
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ELECTRICAL CHARACTERISTICS (For typical values unless otherwise noted) Symbol SUPPLY SECTION V Turn−on threshold level, V CC(on Minimum operating voltage after turn−on CC(min) V Startup voltage on the floating section boot(on) V Cutoff voltage ...
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ELECTRICAL CHARACTERISTICS (For typical values unless otherwise noted) Symbol TIMERS I Timer capacitor charge current when V timer2 I ) – A version only charge2 T Timer duration with capacitor and a 1 ...
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TEMPERATURE (°C) Figure 4. V Threshold CC(on) 60.05 60 59.95 59.9 59.85 59.8 59.75 −40 − TEMPERATURE (°C) Figure 6. F Frequency Clamp SW(min) ...
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TEMPERATURE (°C) Figure 10. Source Resistance (ROH) 114 113 112 111 110 109 108 107 106 105 104 −40 −25 − ...
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TEMPERATURE (°C) Figure 16. Brown−Out Reference (VBO) 1.050 1.048 1.046 1.044 1.042 1.040 1.038 1.036 1.034 1.032 −40 −25 − ...
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TEMPERATURE (°C) Figure 22. Fault Timer Ending Voltage (V ) timer(on) 1.000 0.999 0.998 0.997 0.996 0.995 0.994 0.993 0.992 −40 −25 −10 5 Figure 24. ...
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The NCP1397A/B includes all necessary features to help building a rugged and safe switch−mode power supply featuring an extremely low standby power. The below bullets detail the benefits brought by implementing the NCP1397A/B controller: • Wide frequency range: A high−speed ...
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Rt Rt sets Fmin for V(FB RDT sets the deadtime V CC Fmax Fmax sets the maximum The designer needs to program the maximum switching frequency and the minimum switching frequency. In LLC configurations, ...
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This techniques allows us to detect a fault on the converter in case the FB pin cannot rise above 0.3 V (to actually close the loop) in less than a duration imposed by the programmable timer. Please refer to the ...
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R (kW) Fmin Figure 30. Minimum Switching Frequency Resistor Selection (F = 100 kHz to 500 kHz) min 100 ...
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Fstart(adj) − RFstart/RFmin Fmin(adj) − RFmin Fmax(adj) − Rskip1 + Rskip2 RFstart RFmin CSS Figure 34. Feedback Configuration Using Direct Connection to the Rt Pin Fstart(adj) − RFstart/RFmin Fmin(adj) − RFmin Fmax(adj) − Rskip1 + Rskip2 ...
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charge F SW(min) I dis Ct Vref DT RDT Soft−Start Sequence In resonant controllers, a soft−start is needed to avoid suddenly applying the full current into the resonating circuit. With this controller the soft−start duration is fully ...
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Clock Pulses 12.0 8.00 4.00 0 8.00 4.00 0 −4.00 A − B −8.00 56.2 m Brown−Out protection The Brown−Out circuitry (BO) offers a way to protect the resonant converter from low DC input ...
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Figure 41. Simulation Results for 350 / 250 ON / OFF Levels To the contrary, when the internal BO signal is high (M and M pulse), the IBO ...
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Vout Figure 42. Adding a Comparator on the BO Pin Offers a way to Latch−off the Controller On Figure 42 blocked and does not bother the BO measurement as long as the NTC and the optocoupler are not ...
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VDD Itimer2 Itimer1 UVLO Reset + + - VtimerON VtimerOFF 0 = fault Reset DRIVING SS LOGIC discharge at VCC(on)/ VDD restart if VFB < 0 Vref(fault) Vref(OCP Vref(skip) FB ...
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VDD Itimer1 UVLO Reset + + - VtimerON VtimerOFF 0 = fault Reset DRIVING SS LOGIC On Figures 43 and 44 examples, a voltage proportional to primary current, once averaged, gives an image of the input power ...
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SMPS Stops Fault is Gone Figure 45. A Resistor Can Easily Program the Capacitor Discharge Time Skip/Disable Figure 46. Skip Cycle Can Be Implemented Via Two Resistors on the FB Pin to the Fast Fault Input Skip/Disable ...
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Figure 47. At Power On, Output A is First Activated and the Frequency Slowly Decreases Based on the Soft−Start Figure 47 depicts an auto−recovery situation, where the timer has triggered the end of output pulses. In that case, the V ...
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Figure 48. When the Low, All Pulses are Stopped Until V CC The High−Voltage Driver The driver features a traditional bootstrap circuitry, requiring an external high−voltage diode for the capacitor B Pulse Trigger Fault Delay A Figure ...
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... ORDERING INFORMATION Device NCP1397ADR2G NCP1397BDR2G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. As stated in the maximum rating section, the floating ...
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... SEATING PLANE *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...