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Details, datasheet, quote on part number:LM5030MM
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Datasheet text preview:
LM5030 100V Push-Pull Current Mode PWM Controller
August 2003
LM5030 100V Push-Pull Current Mode PWM Controller
General Description
The LM5030 High Voltage PWM controller contains all of the features needed to implement Push-Pull and Bridge topologies, using current-mode control in a small 10 pin package. This device provides two alternating gate driver outputs. The LM5030 includes a high-voltage start-up regulator that operates over a wide input range of 14V to 100V. Additional features include: error amplifier, precision reference, dual mode current limit, slope compensation, softstart, sync capability and thermal shutdown. This high speed IC has total propagation delays less than 100ns and a 1MHz capable single resistor adjustable oscillator. Package: MSOP-10 (Contact factory for thermally enhanced LLP availability).
Features
n n n n n n n n n n n Internal High Voltage Start-up Regulator Single Resistor Oscillator Setting Synchronizable Error Amplifier Precision Reference Adjustable Softstart Dual Mode Over-Current Protection Slope Compensation Direct Optocoupler Interface 1.5A Peak Gate Drivers Thermal Shutdown
Applications
n Telecommunication Power Converters n Industrial Power Converters n +42V Automotive Systems
Connection Diagram
Top View
20058112
10-Lead MSOP
Ordering Information
Order Number LM5030MM LM5030MMX Package Marking S73B S73B NSC Package Drawing MUB10A MUB10A Supplies As 1000 Units on Tape and Reel 3500 Units on Tape and Reel
© 2003 National Semiconductor Corporation
DS200581
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LM5030
Block Diagram
20058101
FIGURE 1.
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2
LM5030
Pin Description
Pin Name VIN VFB COMP Vcc Pin Number 1 2 3 4 Description Source Input Voltage Application Information Input to start-up regulator. Input range 14 to 100 Volts.
Inverting input to the error amplifier The non-inverting input is internally connected to a 1.25 Volt reference. Output to the error amplifier Output from the internal high voltage series pass regulator. The regulation setpoint is 7.7 Volts. Output of the PWM controller Output of the PWM controller Return Current sense input There is an internal 5K resistor pull-up on this pin. The error amplifier provides an active sink. If an auxiliary winding raises the voltage on this pin above the regulation setpoint the internal series pass regulator will shutdown, reducing the IC power dissipation. Alternating PWM output gate driver. Alternating PWM output gate driver. Ground Current sense input for current mode control and current limit sensing. Using separate dedicated comparators, if CS exceeds 0.5 Volt the outputs will go into Cycle by Cycle current limit. If CS exceeds 0.625V the outputs will be disabled and a softstart commenced. An external resistor sets the oscillator frequency. This pin will also accept synchronization pulses from an external oscillator. A 10µA current source and an external capacitor set the softstart timing length. The controller will enter a low power state if the SS pin is pulled below the typical shutdown threshold of 0.45V.
OUT1 OUT2 GND CS
5 6 7 8
RT SS
9 10
Oscillator timing resistor pin and synchronization input. Dual purpose Softstart and Shutdown pin
3
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