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ACPL-K376 fiches techniques PDF

AVAGO - Isolated Voltage/Current Detector

Numéro de référence ACPL-K376
Description Isolated Voltage/Current Detector
Fabricant AVAGO 
Logo AVAGO 





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ACPL-K376 fiche technique
ACPL-K370, ACPL-K376
Isolated Voltage/Current Detector
Data Sheet
Description
The ACPL-K370 and ACPL-K376 are voltage/current
threshold detection optocouplers. The ACPL-K376 is a low-
current version of the ACPL-K370. To obtain lower current
operation, the ACPL-K376 uses a high-efficiency AlGaAs
LED which has higher light output at lower drive currents.
Both devices have a threshold sensing input buffer IC
that allows threshold levels to be set by a single external
resistor over a wide range of input voltages.
The input buffer has several performance enhancing
features: hysteresis for extra noise immunity and
switching immunity, a diode bridge for easy use with AC
input signals, and internal clamping diodes to protect the
buffer and LED from over-voltage and over-current tran-
sients. Because threshold sensing is done prior to driving
the LED, variations in optical coupling from the LED to the
detector will not effect the threshold levels.
The ACPL-K370 input buffer IC has a nominal turn-on
threshold of 3.8 V(VTH+) and 2.77 mA (ITH+). The buffer
IC for the ACPL-K376 is designed for lower input current.
The nominal turn-on threshold for the ACPL-K376 is 3.8 V
(VTH+) and 1.32 mA (ITH+), which reduces power dissipa-
tion by 52%.
The high-gain output stage features an open-collector
output for both TTL compatible saturation voltages and
CMOS compatible breakdown voltages.
By combining many unique functions in a single package, the
ACPL-K370 and ACPL-K376 are ideal components for indus-
trial control computer input boards and other applications
where a predetermined input threshold level is needed.
Features
x ± 5% voltage detection accuracy
x Wide AC or DC detection range: up to 1140 Vpeak
x User configurable single/dual detection levels
x Built-in hysteresis improves noise immunity
x Very low threshold current: 1.32 mA (ACPL-K376)
x Logic compatible output
x Wide output supply voltage: 2 V to 18 V
x –40°C to +105°C operating temperature range
x SSO-8 package with 8 mm creepage and clearance
x Safety and regulatory approval:
– IEC/EN/DIN EN 60747-5-5: 1140 Vpeak working
insulation voltage
– UL 1577: 5000 Vrms/1minute double protection
rating
– CSA: Component Acceptance Notice #5
Applications
x Limit switch sensing
x Low voltage detector
x AC mains and DC-link voltage detection
x Relay contact monitor
x Relay coil voltage monitor
x Current sensing
x Microprocessor interfacing
x Telephone ring detection
Functional Diagram
Connection Diagram
AC1 1
D1
DC+ 2
D3
DC 3
D2
D4
AC2 4
Figure 1. Functional Diagram
ICC
8 VCC
7 NC
IO 6 VO
TRUTH TABLE
(POSITIVE LOGIC)
5 GND
INPUT OUTPUT
HL
LH
AC/DC
POWER
ISOLATION BARRIER
RX
ACPL-K370
GND1 ACPL-K376
Figure 2. Connection Diagram
GND2
CONTROLLER

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