Connection Diagram

Top View

20135002

16-Lead TSSOP

Ordering Information

Order Number

Package Type

NSC Package Drawing

Supplied As

LM5032MTC

TSSOP-16

MTC-16

92 Units per Rail

LM5032MTCX

TSSOP-16

MTC-16

2500 Units on Tape and Reel

Pin Description

PIN

NAME

DESCRIPTION

APPLICATIONS INFORMATION

1

VIN

Input Supply

Input to the startup regulator. The operating input range is 13V to

100V with transient capability to 105V.

2

COMP1

PWM Control, Controller 1

The COMP1 input provides voltage feedback to the PWM comparator

inverting input of Controller 1 through a 3:1 divider. The OUT1 duty

cycle increases as the COMP1 voltage increases. An internal 5K

Ω

pull-up resistor to +5.0V provides bias current to an opto-coupler

transistor.

3

CS1

Current Sense Input, Controller 1

Input for current mode control and the current limit sensing. If the CS1

pin exceeds 0.5V the OUT1 pulse is terminated producing

cycle-by-cycle current limiting. External resistance connected to CS1

will adjust (increase) PWM slope compensation. This pin’s voltage

must not exceed 1.25V.

4

SS1

Soft-start, Controller 1

An internal 50 µA current source charges an external capacitor to set

the soft-start rate. During a current limit restart sequence, the internal

current source is reduced to 1 µA to increase the delay before retry.

Forcing SS1 below 0.5V shuts off Controller 1.

5

UVLO

VIN Under-Voltage Lockout

An external resistor divider sets the input voltage threshold to enable

the LM5032. The UVLO comparator reference voltage is 1.25V. A

switched 20 µA current source provides adjustable UVLO hysteresis.

The UVLO pin voltage also controls the maximum duty cycle as

described in the Functional Description section.

6

VCC

Start-up regulator output

Output of the 7.7V high voltage start-up regulator. Current limit is a

minimum of 19 mA.

7

OUT1

Main Gate Driver, Controller 1

Gate driver output to the primary side switch for Controller 1. OUT1

swings between VCC and GND1 at a frequency equal to half the

oscillator frequency.

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