NCP1308DR2G ON Semiconductor, NCP1308DR2G Datasheet
NCP1308DR2G
Specifications of NCP1308DR2G
NCP1308DR2GOSTR
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NCP1308DR2G Summary of contents
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... Auxiliary Power Supplies (USB, Appliances, TVs, etc.) © Semiconductor Components Industries, LLC, 2007 June, 2007 - Rev. 3 auxiliary CC NCP1308DR2G CC †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. ...
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Universal Network *Please refer to the application information section. PIN FUNCTION DESCRIPTION Pin Symbol Function 1 Dmg Core reset detection 2 FB Sets the peak current setpoint 3 CS Current sense input and skip cycle level selection 4 GND ...
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Filter PON OVP 10 V 5.3 V (Fault Fault To Internal Mngt. Supply GND MAXIMUM RATINGS Power Supply Voltage Maximum Voltage on all other pins except Pin ...
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ELECTRICAL CHARACTERISTICS unless otherwise noted.) CC Characteristic DYNAMIC SELF SUPPLY V Increasing Level at which the Current Source Turns- Decreasing Level at which the Current Source Turns- Decreasing Level at which ...
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TEMPERATURE (°C) Figure 3. Demagnetization Threshold vs. Temperature - TEMPERATURE (°C) Figure 5. OVP Level Threshold vs. Temperature 2.00 ...
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TEMPERATURE (°C) Figure 8. V Increasing Level at which the CC Current Source Turns-off vs. Temperature - ...
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INTRODUCTION The NCP1308 implements a standard current mode architecture where the switch-off time is dictated by the peak current setpoint, whereas the core reset detection triggers the turn-on event. This component represents the ideal candidate where low part-count is the ...
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The DSS behavior actually depends on the internal IC consumption and the MOSFET's gate charge Qg select a MOSFET like the MTP2N60E, Qg equals 22 nC (max). With a maximum switching frequency selected at 75 kHz, the average ...
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The skip level selection is done through a simple resistor inserted between the current sense input and the sense element. Every time the NCP1308 output driver goes low, a 200 mA source forces a current to flow through the sense ...
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Demagnetization Detection The core reset detection is done by monitoring the voltage activity on the auxiliary winding. This voltage features a FLYBACK polarity. The typical detection level is fixed exemplified by Figure 17. 7.0 POSSIBLE 5.0 ...
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Shutting off the NCP1308 Shutdown can easily be implemented through a simple NPN bipolar transistor as depicted by Figure 21. When OFF transparent to the operation. When forward biased, the transistor pulls the FB pin to ground (V ...
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V CC REGULATION OCCURS HERE 5.3 V DRV INTERNAL FAULT FLAG STARTUP PHASE Soft-Start The NCP1308 features an internal 1ms soft-start to soften the constraints occurring in the power supply during startup activated during ...
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Protecting Pin 8 Against Negative Spikes As any CMOS controller, NCP1308 is sensitive to negative voltages that could appear on its pins (Figure 23). To avoid any adverse latchup of the IC, we strongly recommend to insert a resistor in ...
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Operation Shots Below are some oscilloscope shots captured at Vin = 120 VDC with a transformer featuring a 800 mH primary inductance: Figure 25. This plot gathers waveforms captured at three different operating points Upper Plot: Free run, ...
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NCP1308 V (5 V/div) CC Figure 27. The short-circuit protection forces the IC to enter burst in presence of a secondary overload. http://onsemi.com 15 Vgate (5 V/div) ...
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... M S *For additional information on our Pb-Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. The product described herein (NCP1308), may be covered by one or more of the following U.S. patents: 6,362,067, 6,385,060, 6,385,061, 6,429,709, 6,587,357, 6,633,193. There may be other patents pending. ...