The HL201 PWM Controller datasheet from Haolin Electronics provides specifications, pin definitions, and typical application circuits.
The HL201 is a high‑performance current‑mode PWM controller designed for cost‑effective AC/DC converters. It operates in a flyback topology, features low‑power start‑up, light‑load frequency reduction, and built‑in protections for over‑current, over‑voltage, under‑voltage, and over‑temperature. The device is supplied in a lead‑free DIP‑8 package.
The datasheet includes absolute maximum ratings, recommended operating conditions, a block diagram, detailed pin assignments, electrical parameters, typical application schematics, package dimensions, and information on the built‑in over‑current protection circuit. This manual is written in Chinese.
| Supply voltage (VCC) – absolute max | 16 V |
|---|---|
| Operating temperature range | -25 °C to +85 °C |
| Recommended supply voltage | 4.8 V – 9.0 V |
| Startup current (typical) | 2.0 mA |
| Oscillation frequency (typical) | 61 kHz |
| Maximum PWM duty cycle (typical) | 57 % |
The datasheet recommends a supply voltage (VCC) between 4.8 V and 9.0 V, with 5.5 V as the typical value.
The HL201 integrates over‑current, over‑voltage, under‑voltage, and over‑temperature protection circuits.