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IRIS-A6331

Features

• Oscillator is provided on the monolithic control with adopting On-Chip-

Trimming technology.

• Small temperature characteristics variation by adopting a comparator to

compensate for temperature on the control part.

• Low start-up circuit current (50uA max)

• Built-in Active Low-Pass Filter for stabilizing the operation in case of light

load

• Avalanche energy guaranteed MOSFET with high VDSS

• The built-in power MOSFET simplifies the surge absorption circuit since the

MOSFET guarantees the avalanche energy.

• No VDSS de-rating is required.

• Built-in constant voltage drive circuit

• Various kinds of protection functions

• Pulse-by-pulse Overcurrent Protection (OCP)

• Overvoltage Protection with latch mode (OVP)

• Thermal Shutdown with latch mode (TSD)

INTEGRATED SWITCHER

Package Outline

8 Lead PDIP

Descriptions

IRIS-A6331 is a hybrid IC consists from power MOSFET and a controller IC, designed for PRC

fly-back converter type SMPS (Switching Mode Power Supply) applications, applicable for PRC

operation for small power SMPS. This IC realizes downsizing and standardizing of a power supply

system reducing external components count and simplifying the circuit designs. (Note). PRC is

abbreviation of “Pulse Ratio Control” (On-width control with fixed OFF-time).

1

11

1

2

22

2

3

33

3

4

44

4

8

88

8

7

77

7

6

66

6

5

55

5

IRIS-A6331

Typical Connection Diagram

Type

MOSFET

VDSS(V)

RDS(ON)

MAX

ACinput(V)

Pout(W)

Note 1

IRIS-A6331

500

3.95Ω

100/120±15%

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Key Specifications