NCP1205 ON Semiconductor, NCP1205 Datasheet
NCP1205
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NCP1205 Summary of contents
Page 1
... Associated with automatic multiple valley switching, this unique architecture guarantees minimum switching losses and the lowest power drawn from the mains when operating at no−load conditions. Thus, the NCP1205 is optimal for applications targeting the newest International Energy Agency (IEA) recommendations for standby power. ...
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Demag 2 7 Drive Isense GND PDIP−8 PIN FUNCTION DESCRIPTION Pin No. PDIP−8 PDIP−14 SOIC−16 Pin Name Demag ...
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... R2 D2 150 1N4148 + C14 R10 MTD1N60E NCP1205P C12 1N4148 + C14 33 mF/ R10 15 k NCP1205P2 MTD1N60E 6 C12 1 nF http://onsemi.com 1N5819 10 mH C10 + + 470 mF C11 10 V ...
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HV 1 Last Pulse of Demag after DEMAG ? Demag − 2.5 V − Over Current Protection (OCP) V(−) < 1.5 V Lasts more than 128 ms? ...
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HV 1 Last Pulse of Demag after DEMAG ? Demag − 2.5 V − OVP 6 Over Current Protection (OCP) V(−) < 1 ...
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MAXIMUM RATINGS Rating Power Supply Voltage Thermal Resistance Junction−to−Air Operating Junction Temperature Range Maximum Junction Temperature Storage Temperature Range ESD Capability, HBM Model ESD Capability, Machine Model Demagnetization Pin Current Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings ...
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ELECTRICAL CHARACTERISTICS (continued) Max T = 150° unless otherwise noted Characteristics Current Sense Comparator (continued) Propagation Delay from Current Detection to Gate OFF State Leading Edge Blanking (LEB) Frequency Modulator Minimum Frequency Operation @ ...
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TEMPERATURE (°C) Figure 5. Ct Charging Current versus Temperature 16.5 16 15.5 15 14.5 14 13.5 − TEMPERATURE (°C) Figure 7. Startup Threshold versus Temperature 8 7.75 ...
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... Ip the peak current at which the MOSFET is turned off Fsw the nominal switching frequency To adjust the transmitted power, the PWM controller can play on the switching frequency or the peak current setpoint. To refine the control, the NCP1205 offers the ability to play on both parameters either altogether on an individual basis. http://onsemi.com 9 ...
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... IC smoothly resumes its FB operation. Advantages of the Method By implementing the aforementioned control scheme, the NCP1205 brings the following advantages: • Discontinuous only operation: in DCM, the Flyback is a first order system (at low frequencies) and thus naturally eases the feedback loop compensation. ...
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... Figure 11. A Typical Behavior of Free Running Systems with a Smooth Frequency Foldback with the NCP1205 The typical above diagram shows how the frequency moves with the output power demand. The components used for the simulation were: Vin = 300 6.5 mH, Vout = 10 V, Np/ ...
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... SMPS. Various solutions can be purposely implemented such as the TL431 or a dedicated circuit like the MC33341. In the NCP1205, the internal OPAMP is used to create a virtual ground permanently biased at 2.5 V (Figure 14), an internal reference level. By monitoring this virtual ground further called V(− ...
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low 1.5 V Figure 14. This Typical Arrangement Allows for an Easy Fault Detection Management To illustrate how the system reacts to a variable FB level, we have entered the above circuit into ...
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... Figure 16. In the PDIP−8 Version, the OVP Pad is not Pinned Out and is Available with PDIP−14 Devices Protecting Pin 1 Against Negative Spikes As any CMOS controller, NCP1205 is sensitive to negative voltages that could appear on it’s pins. To avoid any adverse latch−up of the IC, we strongly recommend inserting resistor in series with pin 1 and the high− ...
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V CC Drive Figure 17. When the V Maximum Value, the Device Enters Safe Burst Mode V CC Arbitrary V Representation CC Drive V(−) Figure 18. When the Internal V(−) Passes Below 1.5 V, the IC OVP detected on Pin ...
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F −A− NOTE 2 C −T− N SEATING PLANE 0.13 (0.005 −T− SEATING PLANE 0.13 (0.005) PACKAGE DIMENSIONS PDIP−8 N SUFFIX ...
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... F C 1.35 1.75 0.054 0.068 D 0.35 0.49 0.014 0.019 F 0.40 1.25 0.016 0.049 G 1.27 BSC 0.050 BSC J 0.19 0.25 0.008 0.009 K 0.10 0.25 0.004 0.009 5.80 6.20 0.229 0.244 R 0.25 0.50 0.010 0.019 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative NCP1205 ...