www.irf.com

1

IRIS-A6159

Features

•Small sized 8-pin DIP type full molded package, optimum IC for low-

height SMPS

•Off-timer circuit is provided on the monolithic control IC

• Low start-up circuit current (10uA typ)

•Low circuit current at operation (1.5mA typ)

• 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 Start-up circuit (the power loss in the start-up circuit is

reduced by cutting off the start-up circuit after the IC starts its

operation.)

•Auto Burst Stand-by (realizing input power<0.1W at no load)

•Auto Bias Function (stable burst operation without the interference on

transformer)

•Two operational modes by auto switching functions

For normal operation: PRC mode

For stand-by operation (at light load): Burst mode

•Built-in Leading Edge Blanking Function

•Built-in constant voltage drive circuit

•Various kinds of protection functions

Pulse-by-pulse Overcurrent Protection (OCP)

Overload Protection with auto recovery (OLP)

Overvoltage Protection with latch mode (OVP)

Thermal Shutdown with latch mode (TSD)

INTEGRATED SWITCHER

Package Outline

8 Lead PDIP

Descriptions

IRIS-A6159 is a hybrid IC consisting of a 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 component count and simplifying the circuit design.

Note: PRC is abbreviation for “Pulse Ratio Control” (On-width control with fixed OFF-time).

Typical Connection Diagram

Type

MOSFET

VDSS(V)

RDS(ON)

MAX

ACinput(V)

Pout(W)

Note 1

230±15%

7

85 to 264

5

IRIS-A6159

650

6Ω

Key Specifications

Note 1: The pout (W) represents the thermal rating at PRC Operation. The peak power output is obtained by

approximating 120 to 140% of the above listed value. When the output voltage is low and ON-duty is narrow, the

Pout (W) shall become lower than that of above value.

D

DD

DD

DD

D

O

OO

OC

CC

CP

PP

P

F

FF

FB

BB

B

V

VV

Vc

cc

cc

cc

cG

GG

GN

NN

ND

DD

D

2

22

2

1

11

1

3

33

34

44

4

5

55

5

7

77

7

8

88

8

6

66

6

S

SS

St

tt

ta

aa

ar

rr

rt

tt

tu

uu

up

pp

p

N

NN

NC

CC

C

I

II

IR

RR

RI

II

IS

SS

S-

--

-A

AA

A6

66

61

11

15

55

59

99

9

Data Sheet No. PD 96934A