MC33023 Motorola, MC33023 Datasheet
MC33023
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MC33023 Summary of contents
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... PWM Power Ground 11 Current Limit Ref 9 Current Limit/ MC33023P Shutdown MC33023DW Ground MC34023P Motorola, Inc. 1996 Order this document by MC34023/D MC34023 MC33023 SUFFIX PLASTIC PACKAGE CASE 648 SUFFIX PLASTIC PACKAGE CASE 751G (SO–16L) PIN CONNECTIONS Error Amp ref ...
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... NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. T low = 0 C for MC34023 T high = +70 C for MC34023 T low = – for MC33023 T high 2 MC34023 MC33023 Symbol Value ...
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... NOTES: 1. Maximum package power dissipation limits must be observed. 2. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible. T low = 0 C for MC34023 T high = +70 C for MC34023 T low = – for MC33023 T high MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Symbol ...
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... FREQUENCY (Hz) Figure 5. Error Amp Small Signal Transient Response 2.55 V 2.5 V 2.45 V 0.1 s/DIV 4 MC34023 MC33023 Figure 2. Oscillator Frequency versus Temperature 1200 1000 800 600 400 200 – 55 – AMBIENT TEMPERATURE ( C) Figure 4 ...
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... Pin 11(14 – 20 – 60 – 100 – 55 – AMBIENT TEMPERATURE ( C) MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Figure 8. Reference Short Circuit Current 65.6 65 64.8 64 – 55 – 25 Figure 10. Reference Load Regulation V ref LOAD REGULATION 1 Figure 12 ...
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... Figure 15. Drive Output Rise and Fall Time OUTPUT RISE & FALL TIME 1.0 nF LOAD 50 ns/DIV Figure 17. Supply Voltage versus Supply Current 5 MC34023 MC33023 Figure 14. Output Saturation Voltage 0 – 1 Pulsed Load 120 Hz Rate – 2 2.0 1 ...
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... Inverting Input 1 8 Soft–Start C SS Figure 19. Current Limit Operating Waveforms C T Clock Soft–Start Error Amp Output Ramp PWM Comparator Output MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Figure 18. Representative Block Diagram Reference Regulator V CC UVLO 9 ref 4.2 V UVLO R PWM Q Comparator S ...
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... The MC33023 and MC34023 series are high speed, fixed frequency, single–ended pulse width modulator controllers optimized for high frequency operation. They are specifically designed for Off–Line and DC–to–DC converter applications offering the designer a cost effective solution with minimal external components ...
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... In current mode control, an instability can be encountered at any given duty cycle. The instability is caused by the MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 current feedback loop. It has been shown that the instability is caused by a double pole at half the switching frequency external ramp ( added to the on–time ramp ( the current– ...
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... Output Voltage Feedback Input 2 V ref In voltage mode operation, the control range on the output of the Error Amplifier from 0% to 90% duty cycle is from 2. 4. MC34023 MC33023 PIN FUNCTION DESCRIPTION Description Figure 22. Current Mode Operation C T From Current Sense Element Output Voltage ...
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... R M can be adjusted to achieve the required slope. The diode provides a reset pulse at the ramp input at the end of every cycle. The charge current I M can be calculated Then R M can be calculated MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Figure 24. Primary Side Current Sensing I Sense The addition filter will eliminate instability caused by the leading edge spike on the current waveform ...
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... Reference 4 5 Master 6 Oscillator 12 MC34023 MC33023 Figure 27. External Clock Synchronization 5 The sync pulse fed into the clock pin must be at least 3 and C T need to be set 10% slower than the sync frequency. This circuit is also used in Voltage Mode operation for master/slave operation. The clock signal would be coming from the master which is set at the desired operating frequency, while the slave is set 10% slower ...
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... MOSFET switching speed. A Schottky diode can reduce the driver’s power dissipation due to excessive ringing, by preventing the output pin from being driven below ground. The Schottky diode also prevents substrate injection when the output pin is driven below ground. MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Figure 31. Bipolar Transistor Drive ...
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... MC34023 MC33023 Figure 34. + MOTOROLA ANALOG IC DEVICE DATA ...
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... MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 Figure 35. PC Board With Components 6.5 (Top View) 1500 pF 4.0 1500 pF 15 ...
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... Figure 36. PC Board Without Components 16 MC34023 MC33023 (Top View) 6.5 (Bottom View) MOTOROLA ANALOG IC DEVICE DATA 4.0 ...
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... PL 0.25 (0.010) –A– –B– 0.25 (0.010 MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 OUTLINE DIMENSIONS P SUFFIX PLASTIC PACKAGE CASE 648– SEATING –T– PLANE SUFFIX PLASTIC PACKAGE CASE 751G–02 (SO– ...
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... PROTRUSION OR INTRUSION. THE DAMBAR PROTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE GREATER THAN 0.037 (0.940). THE DAMBAR INTRUSION(S) SHALL NOT CAUSE THE H DIMENSION TO BE SMALLER THAN 0.025 (0.635). 18 MC34023 MC33023 OUTLINE DIMENSIONS FN SUFFIX PLASTIC PACKAGE CASE 775–02 (PLCC) B 0.007 (0.180 – ...
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... US & Canada ONLY 1–800–774–1848 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298 INTERNET: http://motorola.com/sps MOTOROLA ANALOG IC DEVICE DATA MC34023 MC33023 are registered trademarks of Motorola, Inc. Motorola, Inc Equal JAPAN: Nippon Motorola Ltd.: SPD, Strategic Planning Office, 4–32–1, Nishi– ...