TLP185 surface-mount optocoupler SOP-4

The TLP185 is a high-performance surface-mount optocoupler in an SOP-4 package. It integrates a high-efficiency GaAs infrared LED and a phototransistor to provide electrical isolation between input and output. Ideal for signal transmission in noisy environments, it’s widely used in microcontroller interfaces, switching power supplies, and signal isolation circuits.

Key Features of TLP185 Surface-Mount Optocoupler SOP-4:

• High Isolation Voltage: Provides 3750Vrms isolation between input and output.
• Compact SOP-4 Package: Ideal for space-constrained PCB designs.
• Low Input Current: Operates efficiently with LED current as low as 5mA.
• High Collector-Emitter Voltage: Supports output voltages up to 80V.
• Compliance: UL and VDE certified for safe usage in industrial applications.

Technical Specifications of TLP185 Surface-Mount Optocoupler SOP-4:

• Input LED Forward Voltage: 1.2V (typical), 1.4V (max)
• Input Forward Current: 10mA (typical), 50mA (max)
• Output Collector-Emitter Voltage (V_CEO): 80V
• Isolation Voltage: 3750Vrms
• CTR (Current Transfer Ratio): 50% to 600% at IF = 5mA
• Operating Temperature: -55°C to +110°C

Mechanical Specifications of TLP185 Surface-Mount Optocoupler SOP-4:

• Package Type: SOP-4 (Surface-Mount Package)
• Pin Count: 4 pins (2 for LED, 2 for phototransistor)
• Body Material: Molded epoxy
• Marking: TLP185 part number laser marked on top

Dimensions:

• Body Length: 4.6 mm
• Body Width: 3.5 mm
• Height: 2.1 mm
• Lead Pitch: 2.54 mm

Mounting Options:

• SMT Compatible: Designed for automated reflow soldering.
• PCB Mount: Mounts directly to surface-mount pads on PCBs.

Schematic Diagram, Connection, Wiring and Pinout of TLP185:

• Connection: LED anode to logic signal, cathode to ground. Phototransistor collector to output line, emitter to ground.
• Wiring: Ensure correct polarity. No external base resistor required for phototransistor.
• Pinout:
  • Pin 1 – Anode
  • Pin 2 – Cathode
  • Pin 3 – Emitter
  • Pin 4 – Collector

Datasheet of TLP185 Surface-Mount Optocoupler SOP-4:

• Download TLP185 Datasheet (PDF)

Applications of TLP185 Surface-Mount Optocoupler SOP-4:

• Microcontroller Interface: Provides isolation between MCU and high-voltage circuits.
• Signal Isolation: Prevents ground loops and noise in analog/digital signals.
• Switching Power Supplies: Offers reliable feedback path for regulation.
• PLC and Industrial Controls: Ensures signal integrity in electrically noisy environments.
• Consumer Electronics: Used in appliances for safe control interfacing.

Equivalent of TLP185 Surface-Mount Optocoupler SOP-4:

• PC817: Common 4-pin optocoupler with similar CTR range and specs.
• H11L1: Logic-level output optocoupler alternative.
• 4N35: Through-hole alternative with wider CTR range.
• FODM121: Surface-mount optocoupler with fast switching capability.

Package Includes:

• 1 x TLP185 Surface-Mount Optocoupler SOP-4