INT201PF1 View Datasheet(PDF) - Power Integrations, Inc

Part Name

Description

Manufacturer

INT201PF1

High-side Driver IC Floating Inputs Floating High-side Drive

Power Integrations, Inc 

INT201

Pin Functional Description

Pin 1:

No connection.

Pin 2:

No connection.

Pin 4:

Level shift input HSD 2 works in

conjunction with HSD 1 to provide

interface from the low side control logic

and to give noise immunity.

Pin 3:

Level shift input HSD 1 works in

conjunction with HSD 2 to provide

interface from the low side control logic

and to give noise immunity.

Pin 5:

SOURCE connection. Analog reference

point for the circuit, normally connected

to the source of the high side MOSFET.

Pin 6:

HS OUT is the output of the MOSFET

driver for the high side.

Pin 7:

No connection.

Pin 8:

V supplies power to the control logic

DDH

and output driver.

VDDH

LINEAR

REGULATOR

HSD1

HSD2

UV

LOCKOUT

DISCRIMINATOR

S Q DELAY

R

HS OUT

Figure 3. Functional Block Diagram of the INT201.

SOURCE

PI-514B-021792

INT201 Functional Description

5 V Regulator

The 5 V linear regulator circuit provides

the supply voltage for the noise rejection

circuitry and control logic. This allows

the logic section and the driver circuitry

to be directly compatible with 5 V CMOS

logic without the need of an external 5 V

supply.

Undervoltage Lockout

The undervoltage lockout circuit disables

the HS OUT pin whenever the VDDH

power supply falls below 9.0 V, and

maintains this condition until the V

DDH

power supply rises above 9.35 V. This

guarantees that the high side MOSFET

will be off during power-up or fault

conditions.

Noise Immunization Circuit

This circuit provides noise immunity by

combining a sampling circuit with a

flip-flop to turn on and off the driver

only when required to and not when

there is noise on the HSD inputs.

Driver

The CMOS driver circuit provides drive

power to the gate of the MOSFET used

on the high side of the half bridge circuit.

The driver consists of a CMOS buffer

capable of driving external transistors at

up to 15 V. The SOURCE pin is

connected to the source of the external

MOSFET to establish a reference for the

gate voltage.

2F

2/96

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