M51995FP MITSUBISHI, M51995FP Datasheet
M51995FP
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M51995FP Summary of contents
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... Supply voltage range............................................12 to 36V Operating frequency.................................less than 500kHz Oscillator frequency setting resistance •T-ON pin resistance R ...........................10k to 75k ON •T-OFF pin resistance R ..........................2k to 30k OFF MITSUBISHI (Dig./Ana. INTERFACE) SWITCHING REGULATOR CONTROL PIN CONFIGURATION (TOP VIEW) COLLECTOR 1 V OUT 2 EMITTER ...
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BLOCK DIAGRAM V CC UNDER ON/OFF VOLTAGE LOCKOUT OVP(shut down) LATCH OSCILLATOR CAPACITANCE CF OSCILLATOR OSCILLATOR RESISTANCE T-ON (ON duty) (TRIANGLE) OSCILLATOR RESISTANCE T-OFF (OFF duty) VF ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Supply voltage CC V Collector voltage C ...
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ELECTRICAL CHARACTERISTICS Symbol Parameter Block V Operating supply voltage range CC V Operation start up voltage CC(START) V Operation stop voltage CC(STOP) Difference voltage between Vcc operation start and stop Stand-by current Icc L Operating circuit current Icc O Circuit ...
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ELECTRICAL CHARACTERISTICS Symbol Parameter Block Oscillating frequency f OSC T Maximum ON duty DUTY Upper limit voltage of oscillation waveform V OSCH V Lower limit voltage of oscillation waveform OSCL Voltage difference between upper limit and V OSC lower limit ...
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TYPICAL CHARACTERISTICS THERMAL DERATING (MAXIMUM RATING) 1800 1500 1200 900 600 300 100 AMBIENT TEMPERATURE Ta(°C) CIRCUIT CURRENT VS.SUPPLY VOLTAGE (OVP OPERATION) 8.0 OVP RESET POINT 8.87V(-30°C) 7.0 8.94V(25°C) 9.23V(85°C) 6.0 5.0 Ta=-30°C 4.0 ...
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THRESHOLD VOLTAGE OF ON/OFF TERMINAL VS.AMBIENT TEMPERATURE 3.4 3.2 3.0 ON OFF 2.8 2.6 2.4 OFF ON 2.2 2.0 1.8 -40 - AMBIENT TEMPERATURE Ta(°C) INPUT CURRENT OF VF TERMINAL VS.INPUT VOLTAGE - ...
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VF THRESHOLD VOLTAGE FOR TIMER VS. AMBIENT TEMPERATURE 3.5 3.0 2.5 -40 - -60 AMBIENT TEMPERATURE Ta(°C) THRESHOLD VOLTAGE OF CLM- TERMINAL VS. AMBIENT TEMPERATURE 205 200 195 -40 - -60 AMBIENT TEMPERATURE Ta(°C) ...
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OUTPUT LOW VOLTAGE VS. OUTPUT SINK CURRENT 5.0 Ta=25°C 4.0 3.0 Vcc=18V 2.0 Vcc=5V 1.0 0 10m 100m 1m OUTPUT SINK CURRENT I INPUT CURRENT OF DETECTION AMP VS. AMBIENT TEMPERATURE 1.6 1.5 1.4 1.3 1.2 1.1 1.0 0.9 0.8 ...
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ON duty VS. F/B TERMINAL INPUT CURRENT Ta=-30°C Ta=25°C Ta=85° 0.5 1.0 1.5 F/B TERMINAL INPUT CURRENT I OSCILLATING FREQUENCY VS. CF TERMINAL CAPACITY 10000 1000 R =22k ON R ...
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ON duty VS. AMBIENT TEMPERATURE 100 (f =100kHz) OSC -60 -40 - AMBIENT TEMPERATURE Ta(°C) ON duty VS. AMBIENT TEMPERATURE 100 (f =500kHz) OSC ...
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CURRENT FROM OVP TERMINAL FOR OVP RESET VS. SUPPLY VOLTAGE 800 700 600 500 Ta=-30°C Ta=25°C 400 Ta=85°C 300 200 100 SUPPLY VOLTAGE Vcc( M51995AP/FP ...
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... OFF Pin No.is related with M51995AP Fig.2 Example application circuit diagram of fly-back regulator ( / MITSUBISHI (Dig./Ana. INTERFACE) M51995AP/FP SWITCHING REGULATOR CONTROL parts can be reduced and also parts can be replaced by reasonable one. In the following circuit diagram,MOS-FIT is used for output transistor,however bipolar transistor can be used with no problem ...
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... The cycle time of oscillation is given by the summation of Equations 2 and 4. The frequency including the dead-time is not influenced by the temperature because of the built-in temperature compensating circuit MITSUBISHI (Dig./Ana. INTERFACE) M51995AP/FP SWITCHING REGULATOR CONTROL current and one OFF current by the function of Q2,Q3 and ...
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OSC control circuit operates. When over current signal is applied to CLM+ or CLM- terminal,and the current limiting circuit,intermittent action and OSC control circuit starts to operate.In this case T-OFF terminal voltage depends on ...
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PWM comparator and PWM latch section Fig.9 shows the PWM comparator and latch section. The on- duration of output waveform coincides with the rising duration of CF terminal waveform,when the infinitive resistor is connected between F/B terminal and GND. When ...
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It is rather recommended to use not "CLM+" but "CLM-" terminal,as the influence from the gate drive current of MOS-FIT can be eliminated and wide voltage rating -4V is guaranteed for absolute maximum rating. There happen ...
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NO OPERATING DURATION 2V Fig.15 Waveform of CT terminal Fig.16 shows the Icc versus Vcc in this timer-off duration. In this duration the power is not supplied to IC from the third winding of transformer but through from the resistor ...
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Fig.20 shows how to connect the ON/OFF terminal.The switching operation will stop by swich-off and operate by switch- on. Transistor or photo transistor can be replaced by this switch,of course.No resistor 100k is connected and ON/OFF terminal ...
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Vcc 7.8V 8k 12k Q1 Q2 400 OVP 2. GND I1=0 when OVP operates Fig.22 Detail diagram of OVP circuit 8 OVP RESET POINT 8.82V(-30°C) 7 8.97V(25°C) 9.07V(85° Ta=-30°C Ta=25°C 4 Ta=85° ...
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It is not necessary that the induced voltage is settled higher than the operation start-up voltage Vcc drive voltage causes high gate dissipation,on the other hand,too low gate drive voltage does not make the MOS-FET fully on- state or the ...
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Vcc M51995A CVcc1 GND Fig.27 DC source circuit for stable start-up OVP circuit (1)To avoid the miss operation of OVP It is recommended to connect the capacitor between OVP terminal and GND for avoiding the miss operation by the spike ...
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Current limiting circuit (1)Peripheral circuit of CLM+,CLM- terminal Fig.31 and 32 show the example circuit diagrams around the CLM+ and CLM- terminal.It is required to connect the low pass filter,as the main current or drain current contains the spike current ...
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Under the condition of current limiting operation,the output current I2 continues as shown in Fig.33.So the output voltage depends on the product of the input primary voltage V on-duty. If the third winding polarity is positive ,the Vcc depends on ...
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... To use the buffer circuit shown next section (3)Output buffer circuit It is recommended to use the output buffer circuit as shown in Fig.42,when type M51995A drives the large capacitive load or bipolar transistor. as the GS affect to the ( / MITSUBISHI (Dig./Ana. INTERFACE) M51995AP/FP SWITCHING REGULATOR CONTROL V =80V DS V =200V DS V =320V ...
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V OUT M51995A Fig.42 Output buffer circuit diagram DET Fig.43 shows how to use the DET circuit for the voltage detector and error amplifier. For the phase shift compensation,it is recommended to connected the CR network between det terminal and ...
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Vcc Vcc M51995A -Vss GND (-2V to -5V) Fig.47 Driver circuit diagram (1) for bipolar transistor Driver circuit for bipolar transistor When the bipolar transistor is used instead of MOS-FIT,the base current of bipolar transistor must be sinked by the ...
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... APPLICATION EXAMPLE Feed forward types SMPS with multi-output FIN V OUT VF SWITCHING REGULATOR CONTROL R1 COLLECTOR Vcc M51995AP ON/OFF OFF MITSUBISHI (Dig./Ana. INTERFACE) M51995AP/ Cvcc OVP F/B V OUT2 V OUT1 ON/OFF ...