Opto Coupler TLP352/lot

High‑Speed Phototransistor Coupler – TLP352: Rapid, Reliable Isolation

The TLP352 is a small‑signal phototransistor opto‑coupler designed for clean, high‑speed signal isolation between separate electrical domains. Featuring an integrated LED and a silicon phototransistor, it delivers fast turn‑on times (typically 100 ns) while maintaining robust isolation up to 30 kVdc. Compact 4‑lead (SO‑8) packaging makes it ideal for space‑constrained PCB designs that demand high‑reliability in industrial, automotive, or consumer electronics.

Its versatile electrical characteristics—including a wide forward LED current range (1 mA–10 mA) and a low forward‑current peak voltage of 1.2 V—enable precise control of coupling ratio, making the TLP352 suitable for both logic‑level interfacing and analog signal replication. The phototransistor’s low noise and high dynamic impedance (up to 100 kΩ) allow it to drive digital inputs or high‑impedance analog circuits without distortion.

• Key Spec 1: CTR ≈ 6 % (typ.) at 10 mA LED forward current; adjustable by LED drive current.
• Key Spec 2: Isolation voltage ≥ 30 kVdc; withstands high‑energy surges up to 2 kVpeak.
• Key Spec 3: Typical rise‑time ≈ 100 ns; fall‑time ≈ 120 ns, suitable for signals up to 2 MHz.
• Common Use Case: Digital signal isolation between microcontroller I/O and high‑voltage control circuits, analog sensor interfacing, and opto‑isolated power‑on triggers.