LNK632DG-TL

LNK632DG-TL is an offline switch-mode power-supply IC from Power Integrations (LinkSwitch family). It combines a high-voltage MOSFET and a current‑mode PWM controller in a compact package, designed for low‑power isolated flyback converters such as universal-input AC‑DC adapters and chargers (roughly 3–8 W).
Key points:
- Integrated high-voltage MOSFET (about 650–700 V), plus control circuitry.
- Fixed-frequency or valley-switching style operation with cycle‑by‑cycle current limiting.
- Protective features: undervoltage lockout, thermal shutdown, and hiccup fault protection.
- Minimal external components; often no optocoupler is needed in PSR-friendly designs.
- -TL indicates Tape & Reel packaging; DG denotes the package/finish option.
Typical use: design a compact flyback converter with a transformer, diode, and output capacitor. For exact electrical characteristics, pinout, and application guidance, consult the LNK632DG-TL datasheet and reference designs.

- Pin count: 8 pins (SO-8 package) plus an exposed pad.
- Function: off-line switch-mode power supply controller with an integrated high-voltage MOSFET (LinkSwitch/TinySwitch family). It drives the transformer primary (DRAIN to the high-voltage bus, SOURCE to the primary return), is powered via VCC, uses FB for regulation, and has GND as the control/reference pin.

- Manufacturer: Power Integrations, Inc. (PI)
- What kind of company: A semiconductor company that designs and manufactures high-efficiency switching power conversion ICs and modules for offline and DC-DC power supplies.

Common application areas for LNK632DG-TL:
- Off-line isolated flyback SMPS for wall-wart/adapters and small AC-DC supplies
- USB chargers and portable device chargers
- Constant-current LED driver power supplies (low to mid power)
- Battery chargers for Li‑ion/NiMH devices
- Standby/auxiliary power supplies for TVs, set-top boxes, audio/video gear
- Power adapters for telecom and networking equipment
Note: It is a high-voltage integrated MOSFET flyback solution suitable for low- to medium-power isolated supplies with minimal external components.

LNK632DG-TL uses an 8-pin SO-8 surface-mount package (gull-wing) in tape-and-reel packaging.