NE5560 Philipss, NE5560 Datasheet
NE5560
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NE5560 Summary of contents
Page 1
... OUTPUT (EMIT DEMAG: OVERVOLTAGE 5 12 GND 6 11 CURRENT LIMITING 7 10 REMOTE ON/OFF EXTERNAL SYNC T SL00360 ORDER CODE DWG # NE5560N SOT38-4 NE5560D SOT162-1 SE5560N SOT38-4 SE5560F 0582B RATING UNIT + +1. -55 to +125 -65 to +150 ...
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Philips Semiconductors Switched-mode power supply control circuit BLOCK DIAGRAM FEED FORWARD 16 SAWTOOTH REFERENCE GENERATOR VOLTAGE 0.48V 0.6V + FEEDBACK 3 VOLTAGE – 4 GAIN ADJUST 5 MODULATOR INPUT + 8 CUTY CYCLE CONTROL – + 0.6V 1k 0.48V – ...
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... C -0.6 Over temperature Voltage at Pin 16= 16V, V =18V 0.2 Over temperature 0 2 Voltage at Pin 9=0V -65 Over temperature -85 Over temperature 3 Product specification NE/SE5560 NE5560 UNIT UNIT Max Min Typ Max 3.81 3.57 3.72 3.95 V 3.85 3.53 4.00 V -100 ppm/ C 8.8 7.8 8.4 8.8 V 200 ppm/ C 100k 50 100k ...
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... I =0, voltage-forced =12V Over temp. I =10mA current-fed =30mA current-fed Product specification NE/SE5560 NE5560 UNIT UNIT Max Min Typ Max -20 -2 -20 A -40 -40 A 0.8 0.7 0 9.5 6.2 9.5 V 0.7 0.7 V ...
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... When voltage-forced, maximum is 18V; when current-fed, maximum is 30mA. See voltage-/current-fed supply characteristic curve. TYPICAL PERFORMANCE CHARACTERISTICS Open-Loop Gain 10k 100k FREQUENCY (Hz) 1994 Aug 31 NE5560 Function 0 –30 –60 –90 –120 –150 –180 1M 10M 1k 10k Figure 3. Typical Performance Characteristics 5 ...
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... MAX 70% MAX DUTY CYCLE 50 CONTROL 6 50% 2 MAX 30% MAX NE5560 Voltage-/Current-Fed Supply Characteristics Transfer Curve of Pulse-Width Modular Duty Cycle vs Input Voltage (%) 100 ...
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... Loop fault protection circuits assure that the duty cycle is reduced to zero or a low value for open- or short-circuited feedback loops. Stabilized Power Supply (Pins 1, 2, 12) The power supply of the NE5560 is of the well known series regulation type and provides a stabilized output voltage of typically 8.5V. This voltage V ...
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... The function of the PWM circuit is to translate a feedback voltage into a periodical pulse of which the duty cycle depends on that feedback voltage. As can be seen in Figure 10, the PWM circuit in the NE5560 is a long-tailed pair in which the sawtooth on Pin 8 is compared with the LOWEST voltage on either Pin 4 (error amplifier), Pin 5, or Pin 6 ( Figure 11 ...
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Philips Semiconductors Switched-mode power supply control circuit 5.6V 1.1V >2V <0.8V 60dB 1kHz 10kHz Figure 8. Error Amplifier Compensation Open-Loop Gain (+) 8 1994 Aug 31 INHIBIT ‘SET’ Figure 7. Sawtooth Oscillator Synchronization SLOPE 20dB/DECADE 1MHz SL00367 3.72V + ERROR ...
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Philips Semiconductors Switched-mode power supply control circuit REF REF 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 (+) 8 (%) 100 ...
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Philips Semiconductors Switched-mode power supply control circuit 100 0.1 0.2 (%) MAX 50 MAX 40 30 MAX Figure 13. Soft-Start Minimum Duty Cycle ...
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... In many applications not necessary to have a real constant-current output of the SMPS. Protection of the power transistor will be the prime goal. This can be realized with the NE5560 in an economical way. A resistor (or a current transformer) in the emitter of the power transistor gives a replica of the collector current. This signal must be connected to Pin 11 ...
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... Start-up occurs via the slow-start circuit. The Output Stage The output stage of the NE5560 contains a flip-flop, a push-pull driven output transistor, and a gate, as indicated in Figure 18. The flip-flop is set by the flyback of the sawtooth. Resetting occurs by a signal either from the PWM or the current limit circuit ...
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... V max. A regulation of MAX IN ~1/V will allow for a considerable reduction or simplification of MAX IN the transformer. The function of ~1/V can be realized by using IN Pin 16 of the NE5560 (50 Figure 19. Output Stage Inhibit Figure 20 shows the electrical realization. When the voltage at Pin ...
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Philips Semiconductors Switched-mode power supply control circuit NOTES: Power ground and signal ground must be kept separated T1, Primary = 130T (C.T.) #26 Secondary = 18T (C.T.) #22 Core = Ferroxcube 3622 3C8 material C.T. = 50T #26 0n Ferroxcube ...
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Philips Semiconductors Switched-mode power supply control circuit NOTES: Power ground and signal ground must be kept separated T1, Primary = 130T (C.T.) #26 Secondary = 18T (C.T.) #22 Core = Ferroxcube 3622 3C8 material C.T. = 50T #26 0n Ferroxcube ...