AIC AIC1686 Datasheet

AIC1686

Off-Line Power Supply Protection IC with Shunt

Regulator

 FEATURES

 Overvoltage Protection for 3.3V, 5V, and 12V

Outputs.

 Power Good Signal for 5V Output.

 Remote ON/OFF Input.

 Uncommitted Protection Input.

 5V Regulator with 25mA Source Current.

 2.5V Precision Shunt Regulator.

 8V to 16V Operation.

 Low Power Consumption.

 APPLICATIONS

 PC Off-Line Power Management.

 DESCRIPTION

The AIC1686 is a supervisory and protection IC
intended for use in off-line, multiple output
power supplies. It consists of protection circuitry,
power good indicator, remote ON/OFF control,
and precision shunt regulator. The overvoltage
protection (OVP) function is for 3.3V, 5V, and
12V outputs. In addition, an uncommitted fault
detection input (PRIN) is available for use with
other protection functions, such as overcurrent,
undervoltage, and/or short-circuit protection of
outputs.

The shunt regulator has been included to
implement the feedback control for one of the
power supply’s outputs. The noniverting input
(EAI) is internally tied to a precision 2.5V
reference.

The power good circuit monitors the 5V output
and asserts, with a programmable delay, a TTL
compatible high logic level at its output after the
5V output reaches the regulation range. The
delay is programmed by a timing capacitor
connected to CPG pin of the IC. The power
good circuit sets its output low before the 5V
output goes out of regulation range. The remote
ON/OFF function enables the power supply to
be turned on and off from the secondary side by
a switch.

Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC www.analog.com.tw

DS-1686-00 TEL: [phone] FAX: [phone]

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 ORDERING INFORMATION

AIC1686

AIC1686 XX

PACKAGE TYPE
N: PLASTIC DIP

TEMPERATURE RANGE
C: 0°C~70°C

 TYPICAL APPLICATION CIRCUIT

DC OUTPUTS

AC/DC

CONVERTER

PWM

CONTROLLER

AC LINE SENSE

OPTO-

ISOLATOR

OPTP-

ISOLATOR

ORDER NUMBER

AIC1686CN
(PLASTIC DIP)

AIC1686

REGULATION

PROTECTION O/P

PIN CONFIGURATION

TOP VIEW

1

PRIN

2

REMI

PG

3

V33

4

GND

5

V5

6

V12

7

8

EAO

PROTECTION

INPUT

REMOTE

ON/OFF

16

15

14

13

12

11

10

9

POWER
GOOD

CPG

FL

REMO

REF

VCC

CLS

LS

EAI

 ABSOLUTE MAXIMUM RATINGS

Supply Voltage, VCC .......................……………………..………..….................-0.5V to 16V

Pins: V12, V5, V33, LS, EAO ....................…….………….…………................. -0.5V to 16V

Any Other Pins ...............…………........………….…................. GND - 0.5V to VCC+0.5V

Ambient Temperature Range .......................………………………..…................. 0°C~70°C

Thermal Information

Thermal Resistance, θ

Maximum Junction Temperature (Plastic Package) .....….......................………....... 125°C

Maximum Storage Temperature Range .......................……........………....... -65°C~150°C

Maximum Lead Temperature (Soldering 10 Sec) .......................……………............. 300°C

Maximum Power Dissipation .......................………………………………................. 500mW

(Derate at 10mW/°C above 70°C ambient)

DIP Package ...................………..…................. 110°C/W

JA

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 TEST CIRCUIT

Refer to TYPICAL APPLICATION CIRCUIT.

AIC1686

 ELECTRICAL CHARACTERISTICS (VCC= 12V, Ta=25°

°C, unless otherwise specified.)

°°

PARAMETER TEST CONDITIONS SYMBOL MIN. TYP. MAX. UNIT

VCC Supply Current

Nominal Mode ( Remote On) All Outputs Unloaded I

Standby Mode ( Remote Off) All Outputs Unloaded I

VCC

VCCSB

5V Reference (Note1)

Reference Voltage IO=0 to 25mA, CL=1µFV

REF

4.85 5 5.15 V

Line Regulation VCC=8V to 16V, CL=1µF15mV

Error Amplifier

Internal Reference Voltage V

Maximum Output Sink Current V

=1V I

EAO

EA

EA

2.45 2.5 2.55 V

20 mA

Open Loop Voltage Gain 80 dB

Unity Gain Bandwidth CL=100pF GBW 3 MHz

Power Supply Rejection Ratio PSRR 85 dB

Slew Rate CL=100pF SR 2 V/µS

0.5 1 mA

0.4 0.8 mA

Fault Detection

Fault Output High Voltage IOH=500µA, Remote On V

Fault Output High Voltage IOH=20µA, Remote Off V

Fault Output Low Voltage IOL=4.5mA V

FLOH

FLOHS

FLOL

3.3V Input OVP Trip Level Input Voltage Rising V33

5V Input OVP Trip Level Input Voltage Rising V5

OVP

12V Input OVP Trip Level Input Voltage Rising V12

Protection Input Trip Level

Input Voltage Rising

Input Voltage Falling

Fault Latch Delay T

V

PIH

V

PIL

FL

Remote ON/OFF

REMI Input Threshold Input Voltage Rising

Input Voltage Falling

V

RIH

V

RIL

REMI Input Hysteresis HYS

OVP

OVP

4V

4V

3.744.3V

5.566.5V

13.2 14 15.6 V

3.8

10 25 50 µS

3.8

RI

0.7 1.8 V

0.4 V

1.2

1.2

V

V

V

V

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