VIPER17HDTR

VIPER17HDTR is STMicroelectronics’ high-voltage integrated switch-mode power supply (SMPS) IC from the VIPER family. It combines a high-voltage MOSFET and a primary-side PWM controller for off-line flyback converters, enabling compact and efficient power supplies from universal mains.
Key points:
- Integrated high-voltage MOSFET (up to about 700 V) and fixed-frequency current-mode control
- Built-in startup current source and protections (overcurrent/short-circuit, overvoltage, thermal shutdown)
- Designed for minimal external components; suitable for simple, compact SMPS designs
- Common applications: AC adapters, set‑top boxes, TVs, LED drivers, battery chargers
Packaging note:
- The suffix “TR” indicates a packaging/lot variant; check the datasheet for exact options and pinout.
For exact electrical specs, pin configuration, and application notes, consult the VIPER17HDTR datasheet from ST.

VIPER17HDTR is STMicro’s 700 V integrated offline switch (flyback). Direct equivalents are other 700 V integrated flyback/offline switchers, e.g.:
- Power Integrations TOPSwitch GX/TX family
- Power Integrations LinkSwitch (LNK304–LNK306)
- ON Semiconductor NCP12xx/NCP125x series
- Richtek RT82x/RT83x families
Note: check pinout, protection features, and voltage/current specs; use cross-reference tools for exact replacement.

- Pin count: 8 pins (8-pin package, e.g., SO-8/DIP-8).
- Function: Off-line switch-mode power-supply controller with an integrated high-voltage MOSFET (≈700 V) for flyback converters; provides PWM current‑mode regulation plus built‑in protections (UVLO, soft-start, etc.).

- Manufacturer: STMicroelectronics (ST)
- What kind of company: A global, multinational semiconductor company that designs and manufactures integrated circuits and discrete semiconductors for electronics worldwide (headquartered in Geneva, Switzerland).

VIPER17HDTR is an off-line high-voltage integrated switch for isolated SMPS. Typical applications include:
- AC-DC adapters and chargers for mobile devices
- LED lighting drivers (constant-current)
- Standby/auxiliary power supplies for set-top boxes, AV equipment, and consumer electronics
- Small appliances using isolated flyback topologies
- Telecom/data equipment power supplies
These use cases exploit its high-voltage DMOS, compact footprint, and high efficiency for compact, low‑cost off-line power supplies.

TR means Tape-and-Reel packaging. VIPER17HDTR is the VIPER17HD in an 8‑pin surface‑mount package (SO‑8 style) supplied on a Tape‑and‑Reel.