AIC1686 데이터 시트보기 (PDF) - Analog Intergrations
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AIC1686 Datasheet PDF : 8 Pages
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AIC1686
PIN DESCRIPTIONS
IN 1: PRIN
- Auxiliary protection logic input to
fault latch. HIGH for 25µS to set
latch and cause FL output to go
LOW. Internally active pulled
down for normal operation.
PIN 2: REMI - Logic input for remote ON/OFF
control power supply. LOW=
REMOTE ON, HIGH=REMOTE
OFF. In remote off state this chip
goes into standby mode,
FL=HIGH, REMO = LOW, and
PG = LOW.
PIN 3: PG
- Power good output signal. High
level indicates that power is
good.
PIN 4: V33 - From 3.3V power supply. Used
for overvoltage sensing only.
PIN 5: GND - Ground pin. Connect to ground
on secondary side.
PIN 6: V5
- From 5V power supply. Used for
overvoltage sensing as well as
internal supply for certain specific
functions.
PIN 7: V12 - From 12V power supply. Used for
overvoltage sensing only.
PIN 8: EAO - Output of the error amplifier. Can
be used to drive an opto-isolator.
PIN 9: EAI
PIN 10: LS
- Inverting input of the error
amplifier, used to close voltage
feedback loop.
- AC line sense input signal.
Use rectified output from main
power transformer. Internally
clamped to 9V and sinks up to
2mA.
PIN 11: CLS - Timing capacitor used to help
ensure that a falling LS voltage is
detected before power supply
outputs fall out of regulation.
PIN 12: VCC- VCC supply input to IC. This
should be a DC voltage between
8 and 16V.
PIN 13: REF - +5V precision reference output.
May be used to supply up to
25mA to external circuitry.
PIN 14: REMO- Remote ON/OFF output that
indicates the state of the power
supply. HIGH = REMOTE ON,
LOW=REMOTE OFF. This is
essentially the inverse of the
REMI input voltage.
PIN 15: FL - Fault output that indicates the
fault condition. HIGH = NORMAL,
LOW = FAULT. When fault states
the PG goes LOW.
PIN 16: CPG
-Timing capacitor that sets the
delay from +5V main coming up
to PG signal being asserted High.
TPGR
≈
2.5 × CCPG
ICPGH
7
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