NCP3064DR2G

NCP3064DR2G is an On Semiconductor SMPS controller for flyback converters. It’s used in isolated power supplies such as offline adapters, chargers, and LED drivers. The device implements fixed‑frequency, current‑mode PWM to regulate energy transfer in a flyback transformer and typically drives an external MOSFET (external FET variants exist in related parts). It provides a startup/current‑source to power its VDD, a current‑sense/input, and a feedback input (via optocoupler or primary‑side regulation) to set duty cycle. Protection features usually include undervoltage lockout, overcurrent/short‑circuit protection, overvoltage protection, and thermal shutdown. The DR2G suffix denotes the specific RoHS/compliant package variant (8‑pin). In short, NCP3064DR2G is a compact controller designed to simplify design of compact, efficient isolated power supplies by handling PWM control and protection while requiring only a minimal external components around a flyback transformer. For exact electrical specs, pinout, and application guidelines, refer to the current NCP3064DR2G datasheet.

NCP3064DR2G comes in an 8-pin SOIC (surface-mount) package.

- Pin count: 8 pins (in an 8-pin SOIC/DIP package, code DR2G).
- Function: High-voltage, current‑mode PWM controller for offline flyback/switch‑mode power supplies. It regulates via primary current sense and feedback, includes oscillator timing (RT/CT), undervoltage/enable features, and drives the MOSFET gate (external or integrated depending on variant). Typical pins provide Vcc (supply), GND, FB (feedback), IS (current sense), RT/CT (timing), OUTPUT (gate drive), and HV input (DRAIN/VIN) for the primary side. For exact pinout, refer to the datasheet.

- Manufacturer: ON Semiconductor (ON Semi).
- What kind of company: An American multinational semiconductor designer and manufacturer specializing in energy-efficient electronics, including power management, analog, sensors, and automotive ICs.

NCP3064DR2G is a high‑voltage, current‑mode PWM controller for off‑line flyback SMPS. Typical applications:
- AC/DC adapters and wall‑wart/brick power supplies
- Battery chargers
- Standby/auxiliary power supplies for consumer electronics (TVs, monitors, set‑top boxes)
- General low‑to‑medium power flyback SMPS designs
(Uses: fixed‑frequency flyback regulation in primary‑side controlled systems.)

NCP3064DR2G is an ON Semiconductor high‑voltage, current‑mode PWM controller for flyback converters (offline). There isn’t an exact pin‑for‑pin replacement; closest functional equivalents include:
- ON Semiconductor: other NCP306x parts (e.g., NCP3063, NCP3065) for similar control
- TI: UC3842/UC3843/UC3844 (external FET, current‑mode PWM)
- ST: VIPER12A/VIPER22A (offline flyback with integrated FET)
- Power Integrations: TinySwitch‑II LNK3xx (integrated FET)
Note: check HV rating, startup current, frequency, and pinout for your design.