Broadcom ACPL-K308U

The industrial ACPL-K308U photovoltaic driver is designed to drive high voltage MOSFETs. It consists of an AlGaAs infrared light-emitting diode (LED) input stage optically coupled to an output detector circuit. The detector consists of a high-speed photovoltaic diode array and a turn-off circuit. This photovoltaic driver turns on (contact closes) with a minimum input current of 5 mA through the input LED. It turns off (contact opens) with an input voltage of 0.8 V or less. The ACPL-K308U is ideal for the fast turn ON/OFF in inrush current prevention and Insulation resistance measurement/leakage current detection.

Key features

• 8 mm creepage and clearance in a compact SSO8 package
• Operating temperature range: -40 °C to +125 °C
• Photovoltaic driver for high voltage MOSFETs in Solid State Relay (SSR) applications
• Typical switching speed: 0.058 ms (TON), 0.016 ms (TOFF) at IF = 10 mA, CL = 1 nF

Additional features

• Open circuit voltage:
  • 8.2 V (typ) at I_F = 10 mA
• Short circuit current:
  • 60 µA (typ) at I_F = 10mA
• Logic circuit compatibility
• Configurable to a wide portfolio of high voltage MOSFETs
• Galvanic isolation
• High input-to-output insulation voltage
• Safety and regulatory approvals:
  • IEC/EN/DIN EN 60747-5-5
  • Maximum working insulation voltage V_IORM = 1140 V_PEAK
  • 5000 V_RMS for 1 minute per UL
• Stretched SO-8 package outline footprint:
  • 8 mm (min) clearance/creepage

Applications

• Solid State Relay module
• Inrush current prevention
• Insulation resistance measurement in battery systems
• Solar PV inverters
• EV charging system
• Motor winding Insulation