MC44608_06 ONSEMI [ON Semiconductor], MC44608_06 Datasheet
MC44608_06
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MC44608_06 Summary of contents
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MC44608 Few External Components Reliable and Flexible SMPS Controller The MC44608 is a high performance voltage mode controller designed for off−line converters. This high voltage circuit that integrates the startup current source and the oscillator capacitor, requires few external components ...
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DMG + − /20 mV Demag Logic Latched off Output Phase Startup Phase Startup Switching m Phase 200 A Phase & Standby Standby Management OC Leading Edge Output Blanking 2 Isense ORDERING INFORMATION Device MC44608P40 ...
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ELECTRICAL CHARACTERISTICS Characteristic OUTPUT SECTION Output Resistor Sink Resistance Source Resistance Output Voltage Rise Time (from 3 9.0 V) (Note 1) Output Voltage Falling Edge Slew−Rate (from 9.0 V down to 3.0 V) (Note 1) CONTROL INPUT ...
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ELECTRICAL CHARACTERISTICS otherwise noted) (Note 2) Characteristic DEMAGNETIZATION DETECTION section (note 3) Demag Comparator Threshold (V increasing) pin1 Demag Comparator Hysteresis (Note 4) Propagation Delay (Input to Output, Low to High) Input Bias Current ( mV) demag Negative ...
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Pin Name 1 Demag The Demag pin offers 3 different functions: Zero voltage crossing detection (50 mV current detection and 120 mA current detection. The 24 mA level is used to detect the secondary reconfiguration status and the ...
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In standby mode, this current can be lowered as due to the activation of a 200 mA current source (kW) Ipk + max *stby R sense (W) Switching Phase m 200 A & Isense ...
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OSC 4 V Vcont 2.4 V Clock DMG Iprim Figure 6. The OSC and Clock signals are provided according to the Figure 6. The Clock signals correspond to the CT capacitor discharge. The bottom curve represents the current flowing in ...
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Overload In the hiccup mode the 3 distinct phases are described as follows (refer to Figure 7): The SWITCHING PHASE: The SMPS output is low and the regulation block reacts by increasing the ON time (dmax = 80%). ...
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EQUATION 1 Startup Phase Duration stup * UVLO2) Vcc t start– stup where the startup current flowing through V stup C is the V capacitor value Vcc CC EQUATION 2 Switching Phase Duration: C ...
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EQUATION ccS Stup I stup EQUATION stup where ccs stup ...
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Pin6 V Voltage (V) CC Figure 9. Output Switching Speed 85° −25° 25° 0.0 0.5 ...
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C 10.00 9.00 8.00 25° C 7.00 85° C 6.00 5.00 0 100 200 Vi Pin8 Voltage (Vi) Figure 15. High Voltage Current Source The data in Figure 16 corresponds to the waveform in Figure 17. The Figure ...
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The Figure 19 represents a complete power supply using the secondary reconfiguration. The specification is as follows: Input source: 3 Outputs Output power Standby mode R F6 47288900 FI RFI WIDE C1 FILTER MAINS 100 nF C3 D1, D2, D3, ...
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The secondary reconfiguration is activated by the mP through the switch. The dV/dt appearing on the high voltage winding (pins 14 of the transformer) at every TMOS switch off, produces a current spike through the series RC network R7, C17. ...
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F −A− NOTE 2 −T− N SEATING PLANE 0.13 (0.005) The product described herein (MC44608), may be covered by one or more of the following U.S. patents: 6,208,538 B1; 6,392,906 B2. There ...