MC33362DWG View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

MC33362DWG

High Voltage Switching Regulator

ON Semiconductor 

MC33362

PIN FUNCTION DESCRIPTION

Pin

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 2

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 3

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 4, 5, 12, 13

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 6

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 7

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 8

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 9

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 10

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 11

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 14, 15

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 16

Function

Description

Startup Input

−

VCC

This pin connects directly to the rectified ac line voltage source. Internally Pin 1 is tied to the drain

of a high voltage startup MOSFET. During startup, the MOSFET supplies internal bias, and

charges an external capacitor that connects from the VCC pin to ground.

This pin has been omitted for increased spacing between the rectified AC line voltage on Pin 1

and the VCC potential on Pin 3.

This is the positive supply voltage input. During startup, power is supplied to this input from Pin 1.

When VCC reaches the UVLO upper threshold, the startup MOSFET turns off and power is sup-

plied from an auxiliary transformer winding.

Ground

These pins are the control circuit grounds. They are part of the IC lead frame and provide a ther-

mal path from the die to the printed circuit board.

RT

Resistor RT connects from this pin to ground. The value selected will program the Current Limit

Comparator threshold and affect the Oscillator frequency.

CT

Capacitor CT connects from this pin to ground. The value selected, in conjunction with resistor RT,

programs the Oscillator frequency.

Regulator Output This 6.5 V output is available for biasing external circuitry. It requires an external bypass capacitor

of at least 1.0 mF for stability.

Compensation

This pin is the Error Amplifier output and is made available for loop compensation. It can be used

as an input to directly control the PWM Comparator.

Voltage Feedback

Input

This is the inverting input of the Error Amplifier. It has a 2.6 V threshold and normally connects

through a resistor divider to the converter output, or to a voltage that represents the converter

output.

Overvoltage

Protection Input

This input provides runaway output voltage protection due to an external component or connec-

tion failure in the control loop feedback signal path. It has a 2.6 V threshold and normally con-

nects through a resistor divider to the converter output, or to a voltage that represents the con-

verter output.

−

These pins have been omitted for increased spacing between the high voltages present on the

Power Switch Drain, and the ground potential on Pins 12 and 13.

Power Switch Drain This pin is designed to directly drive the converter transformer and is capable of switching a maxi-

mum of 500 V and 2.0 A.

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