LM5034MTC/NOPB National Semiconductor, LM5034MTC/NOPB Datasheet
LM5034MTC/NOPB
Specifications of LM5034MTC/NOPB
LM5034MTC
Related parts for LM5034MTC/NOPB
LM5034MTC/NOPB Summary of contents
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... PWM slope compensation, soft-start, and a 2 MHz capable oscillator with synchronization capability. Typical Application Circuit Dual Interleaved Regulators with Independent Outputs © 2005 National Semiconductor Corporation Features n Two independent PWM current mode controllers n Integrated high voltage startup regulator n Compound 2.5A main output gate drivers ...
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Connection Diagram Ordering Information Order Number Package Type LM5034MTC TSSOP-20 LM5034MTCX TSSOP-20 Pin Description PIN NAME DESCRIPTION 1 OVLP Active Clamp Overlap Adjust 2 VIN Input Supply 3 COMP1 PWM Control, Controller 1 4 CS1 Current Sense Input, Controller 1 ...
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Pin Description (Continued) PIN NAME DESCRIPTION 6 UVLO VIN Under-Voltage Lockout 7 VCC1 Start-up regulator output, Controller 1 8 OUT1 Main Gate Driver, Controller 1 9 AC1 Active Clamp Driver, Controller 1 10 GND1 Ground, Controller 1 11 GND2 Ground, ...
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Block Diagram www.national.com FIGURE 1. Detailed Block Diagram 4 20136803 ...
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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. VIN to GND VCC to GND RT/SYNC, RES and DCL to GND CS Pins to GND All other inputs to GND ESD Rating (Note 5) Human Body Model ...
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Electrical Characteristics Specifications with standard typeface are for T Temperature range. VIN = 48V, VCC1 = VCC2 = 10V externally applied, R 1.5V, unless otherwise stated (Note 3) and (Note 4). Symbol Parameter Oscillator (RT/SYNC Pin) F Frequency 1 (at ...
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... For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: For detailed information on soldering plastic TSSOP packages, refer to the Packaging Data Book available from National Semiconductor Corporation. Note 3: All limits are guaranteed. All electrical characteristics having room temperature limits are tested during production with T guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control. Note 4: Typical specifications represent the most likely parametric norm at 25˚ ...
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www.national.com 8 ...
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Timing Diagram (Continued) FIGURE 3. Startup Sequence 9 20136805 www.national.com ...
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Typical Performance Characteristics FIGURE VIN IN FIGURE VIN IN www.national.com 20136806 FIGURE 6. I 20136807 FIGURE 7. VCC vs VIN 10 20136808 vs Externally Applied VCC CC 20136809 ...
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Typical Performance Characteristics (Continued) FIGURE 8. VCC vs I (Externally Loaded) CC FIGURE 9. Oscillator Frequency vs R FIGURE 10. User Defined Maximum Duty Cycle vs. 20136810 FIGURE 11. Maximum Duty Cycle vs. UVLO Voltage 20136811 Resistor T 11 20136812 ...
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Typical Performance Characteristics (Continued) FIGURE 12. Maximum Duty Cycle vs. VIN (Figure 29) FIGURE 13. Active Clamp Overlap Time vs. R www.national.com FIGURE 14. Frequency vs. Temperature 20136814 FIGURE 15. Overlap Time vs. Temperature 20136815 OVLP FIGURE 16. Soft-start Pin ...
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Typical Performance Characteristics (Continued) FIGURE 17. Current Limit Threshold at CS1, CS2 vs. Temperature 20136819 13 www.national.com ...
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Functional Description The LM5034 contains all the features necessary to imple- ment two independently regulated current mode dc/dc con- verters single high current converter comprised of two parallel interleaved channels using the Forward/ Active Clamp topology. The two ...
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Drivers Off, V Disable CC Off signal to disable the output drivers, connect the SS1, SS2, COMP1, COMP2 and RES pins to ground, and enable the 50 µA Soft-start current sources. If the V voltage falls below the under-voltage threshold ...
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Cycle-by-Cycle Current Limit Each CS pin is designed to accept a signal representative of its transformer primary current. If the voltage at CS exceeds 0.5V the current sense comparator terminates the present main output driver (OUT pin) pulse. If the ...
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Hiccup Mode Current Limit Restart (Continued) FIGURE 20. Current Limit Restart Circuit FIGURE 21. Current Limit Restart Timing 17 20136823 20136824 www.national.com ...
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Soft-start Each soft-start circuit allows the corresponding regulator to gradually reach a steady state operating point, thereby re- ducing startup current surges and output overshoot. Upon turn-on, both SS pins are internally held at ground. When VCC increases past its ...
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Driver Outputs (Continued) Thermal Shutdown The LM5034 should be operated so the junction temperature does not exceed 125˚ junction temperature transient reaches 165˚C (typical), the Thermal Shutdown circuit acti- vates the V Disable and Drivers Off lines (see ...
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Applications Information VIN The voltage applied to the VIN pin, normally the same as the system voltage applied to the power transformer’s primary (V ), can vary in the range 100V with transient PWR capability to 105V. ...
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Applications Information FIGURE 28. Shutdown Control VCC1, VCC2 The capacitors at each VCC pin provide not only regulator noise filtering and stability, but also prevents VCC from dropping to the lower under-voltage threshold level (UVT = 6.2V) when the output ...
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Applications Information FIGURE 30. Current Sense Using a Current Sense Transformer FIGURE 31. Current Sense Using a Source Sense Resistor (R1) HICCUP MODE CURRENT LIMIT RESTART This circuit’s operation is described in the Functional De- scription. Also see Figure 20 ...
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Applications Information With a 0.1 µF capacitor at SS )150 ms. Experimentation with the startup sequence and over-current restart condition is usually necessary to determine the ap- propriate value for the SS capacitors. To shutdown one regulator without ...
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Applications Information outputs are connected together to provide the same voltage FIGURE 34. Circuit Configuration for Independent Outputs FIGURE 35. Circuit Configuration for Single High Current Output www.national.com to COMP1 and COMP2. See Figure 35. Efficiency measure- (Continued) ments for ...
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Applications Information FIGURE 36. Total Board Efficiency, Independent Outputs (Continued) 20136842 20136843 FIGURE 37. Efficiency, Single Output 25 www.national.com ...
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www.national.com 26 ...
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Evaluation Board Schematic Item C1-4 C5, 50 C6, 17, 19 C7, 10, 11, 35, 38 C8, 16, 18, 24, 26, 27, 39, 40 C12, 13 C14, 15 C20, 21 C22, 23, 34, 37, 43, 44 C25, 41 C28, ...
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Evaluation Board Schematic Item T1, 2 Transformer, Pulse Eng. P8208T T3, 4 Transformer, Coilcraft B0357 U3, 4 U5, 6 www.national.com (Continued) Bill of Materials (Circuit of Figure 38) (Continued) Description Package 0.33 x 0.28 0.92 x 0.81 PWM ...
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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. ...