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MC33023DW Datasheet(PDF) 1 Page - ON Semiconductor |
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MC33023DW Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 18 page © Semiconductor Components Industries, LLC, 2005 October, 2005 − Rev. 6 1 Publication Order Number: MC34023/D MC34023, MC33023 High Speed Single−Ended PWM Controller The 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. These integrated circuits feature an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high speed current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET. Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, and a latch for single pulse metering. The flexibility of this series allows it to be easily configured for either current mode or voltage mode control. Features • 50 ns Propagation Delay to Output • High Current Totem Pole Output • Wide Bandwidth Error Amplifier • Fully−Latched Logic with Double Pulse Suppression • Latching PWM for Cycle−By−Cycle Current Limiting • Soft−Start Control with Latched Overcurrent Reset • Input Undervoltage Lockout with Hysteresis • Low Startup Current (500 mA Typ) • Internally Trimmed Reference with Undervoltage Lockout • 90% Maximum Duty Cycle (Externally Adjustable) • Precision Trimmed Oscillator • Voltage or Current Mode Operation to 1.0 MHz • Functionally Similar to the UC3823 • Pb−Free Packages are Available* Error Amp Oscillator 16 Vref Clock RT CT Ramp Error Amp Output Inverting Input Soft−Start Soft−Start Latching PWM Ground 10 9 Current Limit/ Shutdown Power Ground VC VCC UVLO 5.1V Reference Current Limit Ref This device contains 176 active transistors. Output Noninverting Input 4 5 6 7 3 2 1 8 15 13 14 11 12 Figure 1. Simplified Application MARKING DIAGRAMS 1 16 PDIP−16 P SUFFIX CASE 648 1 16 SOIC−16W DW SUFFIX CASE 751G 1 16 MC34023P AWLYYWWG MC33023DW AWLYYWWG PIN CONNECTIONS (Top View) Error Amp Noninverting Input Soft−Start Ramp CT RT Clock Error Amp Output Error Amp Inverting Input Current Limit/ Shutdown Current Limit Reference Power Ground Output VCC Vref 11 5 2 1 9 10 12 13 14 15 16 8 7 6 4 3 Ground VC See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet. ORDERING INFORMATION *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. http://onsemi.com A = Assembly Location WL = Wafer Lot YY = Year WW = Work Week G = Pb−Free Package 16 1 |
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