Datasheet

LM5030
www.ti.com SNVS215C –APRIL 2003–REVISED MARCH 2013
PIN DESCRIPTION
Pin Name Pin Description Application Information
Number
V
IN
1 Source Input Voltage Input to start-up regulator. Input range 14 to 100 Volts.
V
FB
2 Inverting input to the error amplifier The non-inverting input is internally connected to a 1.25 Volt reference.
COMP 3 Output to the error amplifier There is an internal 5K resistor pull-up on this pin. The error amplifier
provides an active sink.
Vcc 4 Output from the internal high voltage If an auxiliary winding raises the voltage on this pin above the
series pass regulator. The regulation regulation setpoint the internal series pass regulator will shutdown,
setpoint is 7.7 Volts. reducing the IC power dissipation.
OUT1 5 Output of the PWM controller Alternating PWM output gate driver.
OUT2 6 Output of the PWM controller Alternating PWM output gate driver.
GND 7 Return Ground
CS 8 Current sense input 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.
RT 9 Oscillator timing resistor pin and An external resistor sets the oscillator frequency. This pin will also
synchronization input. accept synchronization pulses from an external oscillator.
SS 10 Dual purpose Softstart and Shutdown A 10µA current source and an external capacitor set the softstart timing
pin length. The controller will enter a low power state if the SS pin is pulled
below the typical shutdown threshold of 0.45V.
WSON SUB Die Substrtae The exposed die attach pad on the WSON package should be
DAP connected to a PCB thermal pad at ground potential. For additional
information on using TI's No Pull Back WSON package, please refer to
WSON Application Note AN-1187.
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