LM5033SD National Semiconductor, LM5033SD Datasheet
LM5033SD
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LM5033SD Summary of contents
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... Ordering Information Order Number Package Type LM5033MM MSOP-10 LM5033MMX MSOP-10 LM5033SD LLP- mm) LM5033SDX LLP- mm) © 2005 National Semiconductor Corporation Features n Internal high voltage (100V) start-up regulator n Single resistor oscillator setting n Synchronizable n Precision reference output n Adjustable soft-start > ...
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Pin Description PIN NAME 1 Vin Input Voltage 2 REF 2.5V precision reference output 3 COMP PWM Input 4 VCC 9.6V output from the internal high voltage series pass regulator 5 OUT1 Gate Driver Output #1 6 OUT2 Gate Driver ...
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Block Diagram Functional Block Diagram FIGURE 1. 3 20035402 www.national.com ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND GND CC Rt/Sync to GND Pins GND ESD Rating (Note 3) Electrical Characteristics Specifications with standard typeface are for T Temperature range ...
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Electrical Characteristics Specifications with standard typeface are for T Temperature range 48V 5). Symbol Parameter Oscillator (Pin 9) Fs1 Internal frequency Fs2 Internal frequency Vsync Sync threshold R /Sync DC voltage t PWM Comparator Input ...
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Typical Performance Characteristics Oscillator Frequency vs R Soft Start Current vs Temperature www.national.com 20035403 Oscillator Frequency vs Temperature T 20035405 Dead Time vs Temperature 20035407 48V ...
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Typical Performance Characteristics Output Duty Cycle vs Comp Voltage R = 16.5kΩ Powered Externally) CC (Continued) 20035409 (V Not Powered Externally) CC 20035411 REF REF 20035410 ...
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Functional Description The LM5033 High Voltage PWM controller contains all of the features needed to implement Push-Pull and Bridge topolo- gies, using voltage-mode control in a small 10 pin package. Features included are: startup regulator, precision 2.5V ref- erence output, ...
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Current Sense (Pin 8) The external current sensing circuit should include an RC filter located near the IC to prevent false triggering of the Current Sense comparator due to transients or noise. An internal MOSFET discharges the external filter capacitor ...
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Application Information V (PIN 1) IN The voltage applied at pin 1, normally the same as that applied to the main transformer’s primary, can be in the range 90V, with transient capability to 100V. The current into ...
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Application Information PC BOARD LAYOUT The LM5033 current sense and PWM comparators are very fast, and as such will respond to short duration noise pulses. Layout considerations are critical for the current sense filter. The components at pins 3, 8, ...
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Application Information www.national.com (Continued) FIGURE 4. Efficiency vs Output Current Circuit of Figure 6 FIGURE Load Current and V OUT for the circuit of Figure 6 12 20035417 20035418 IN ...
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Bill of Materials (for the circuit of Figure 6) Item BR1 Schottky diode bridge, Diodes, Inc. BAT54BRW C1 C7, 12, 16, 20-23 C8, 9 C10, 11 C13 C14 C15, 24 C17 C18 C19 D1 Dual Schottky diode, Vishay ...
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Bill of Materials (for the circuit of Figure 6) Item Device R22 Resistor R23 Resistor R25 Resistor R26 Resistor T1 Power Transformer, Coilcraft B0853-A T2 Current sense transformer, Pulse Eng. P8208 U1 PWM Controller, National Semi LM5033D U2, 3 Dual ...
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Physical Dimensions unless otherwise noted www.national.com inches (millimeters) 10-Lead MSOP Package NS Package Number MUB10A 10-Lead LLP Plastic Dual Package NS Package Number SDC10A 16 ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...