ACPL-K370-000E

The ACPL-K370 is voltage/current threshold detection optocouplers. The ACPL-K376 is a lowcurrent 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 transients. 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.

• ± 5% voltage detection accuracy
• Wide AC or DC detection range: up to 1140 Vpeak
• User configurable single/dual detection levels
• Built-in hysteresis improves noise immunity
• Very low threshold current: 1.32 mA (ACPL-K376)
• Logic compatible output
• Wide output supply voltage: 2 V to 18 V
• –40°C to +105°C operating temperature range
• SSO-8 package with 8 mm creepage and clearance
• 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