The CR6853 PWM Controller datasheet from Chip‑Rail details features, pin assignments, electrical characteristics and package dimensions.
The CR6853 is a low‑cost, current‑mode PWM controller designed for small‑power offline AC‑DC fly‑back converters. It offers low start‑up (≈1.5 µA) and operating currents (≈1.4 mA), programmable frequency, built‑in slope compensation, low‑EMI technique, and a range of protection functions such as over‑voltage, over‑load, short‑circuit and over‑temperature.
The document provides pin descriptions, a block diagram, absolute maximum ratings, electrical characteristics, and detailed package dimensions for SOT‑23‑6L, SOP‑8, and DIP‑8 versions. It also explains operation modes (PWM, PFM, CRM), leading‑edge blanking, and the internal protection circuitry.
| Startup Current | 3.0 µA (typ) |
|---|---|
| Operating Current | 1.4 mA (typ) |
| Supply Voltage Range | 10 V – 30 V |
| PWM Frequency | 30 kHz – 150 kHz |
| Output Clamp Voltage | 18.0 V |
| Maximum Output Power | 0 W – 80 W |
| Storage Temperature | -55 °C – +150 °C |
The startup current is specified as 3.0 µA typical (up to 20 µA).
The controller can operate with a PWM frequency from 30 kHz to 150 kHz.
The device is offered in SOT‑23‑6L, SOP‑8 and DIP‑8 packages.