lm5025cmtcx National Semiconductor Corporation, lm5025cmtcx Datasheet
lm5025cmtcx
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lm5025cmtcx Summary of contents
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... Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, pre- cision reference and thermal shutdown. Typical Application Circuit © 2009 National Semiconductor Corporation Features ■ Internal Start-up Bias Regulator ■ ...
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... Connection Diagram Ordering Information Order Number Package Type LM5025CMTC TSSOP-16 LM5025CMTCX TSSOP-16 Pin Descriptions Pin Name 1 V Source Input Voltage IN 2 RAMP Modulator ramp signal 3 CS1 Current sense input for cycle-by-cycle limiting If CS1 exceeds 0.5V the outputs will go into Cycle-by- 4 CS2 ...
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Pin Name 9 OUT_B Active Clamp output driver 10 PGND Power ground 11 AGND Analog ground 12 SS Soft-start control 13 COMP Input to the Pulse Width Modulator 14 RT Oscillator timing resistor pin 15 SYNC Oscillator UP/DOWN synchronization input ...
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Block Diagram www.national.com Simplified Block Diagram 4 30058902 ...
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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 CS1, CS2 to GND All other inputs to GND ESD Rating ...
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Symbol Parameter Soft-Start Soft-start Current Source Normal Soft-start Current Source following a CS2 event Oscillator Frequency1 Frequency2 Sync threshold Min Sync Pulse Width Sync Frequency Range PWM Comparator Delay to Output Duty Cycle Range COMP to PWM Offset COMP Open ...
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... For guaranteed specifications and test conditions, see the Electrical Characteristics. Note 2: For detailed information on soldering plastic TSSOP package, 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 limits are guaranteed by correlating the electrical characteristics to process and temperature variations and applying statistical process control ...
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Overlap Time vs R Dead Time Pin Current vs Temperature www.national.com SET 30058907 SET 30058909 30058911 8 Overlap Time vs Temperature R = 38K SET 30058908 Dead Time vs Temperature R = 29.5K SET 30058910 ...
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Detailed Operating Description The LM5025C is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025C are: The maximum duty cycle of the LM5025C is increased from 80% to 91%. The soft-start capacitor charging ...
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Compound Gate Drivers The LM5025C contains two unique compound gate drivers, which parallel both MOS and Bipolar devices to provide high drive current throughout the entire switching event. The Bipo- lar device provides most of the drive current capability and ...
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SS capacitor protects a continuously over-load- ed converter with a low duty cycle hiccup mode. These two modes of over-current protection allow the user great flexibility to configure the system behavior in over-load conditions desired ...
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Feed-Forward Ramp An external resistor (R ) and capacitor ( and GND are required to create the PWM ramp signal. IN The slope of the signal at the RAMP pin will vary in proportion to the input line ...
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Application Circuit: Input 36-78V, Output 3.3V, 30A 13 www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Molded TSSOP-16 NS Package Number MTC16 14 ...
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Notes 15 www.national.com ...
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