Key facts
- Manuals
- 2
- Languages
- ZH · EN
- Last added
- 2012-03-14
Featured Chip-Rail manuals
Meisi Xing CR6848 Datasheet
The CR6848 is a highly integrated, low‑power current‑mode PWM controller designed for off‑line AC‑DC flyback topologies in small‑power supply modules. It features adjustable PWM frequency via an external resistor, automatic entry into PFM mode under light or no load to reduce standby power, and built‑in synchronous slope compensation and trapezoidal power‑limit circuits for stable operation.
The device includes over‑voltage and over‑current protection, a 16.5 V output voltage clamp, and 2000 V ESD protection. It is offered in lead‑free SOT‑23‑6L and DIP‑8 packages and is suitable for battery chargers, set‑top box power supplies, DVD power supplies, and other sub‑60 W flyback modules. This manual is written in Chinese.
Covers: Overview · Pin Description · Recommended Operating Parameters · Electrical Characteristics · Parameter Curves · Internal Block Diagram
Chip‑Rail CR6853 PWM Controller Datasheet
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.
Covers: Features · Pin Assignment · Block Diagram · Electrical Characteristics · Package Dimensions · Operation Description
Latest Chip-Rail manuals
Meisi Xing CR6848 Datasheet
Datasheet 13 pages · 189 KB · ZHThe Meisi Xing CR6848 datasheet details a low‑power current‑mode PWM controller for off‑line AC‑DC flyback converters.
Chip‑Rail CR6853 PWM Controller Datasheet
Datasheet 12 pages · 199 KB · ENThe CR6853 PWM Controller datasheet from Chip‑Rail details features, pin assignments, electrical characteristics and package dimensions.
Which document do I need?
Datasheet
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in Chip-Rail manuals
What PWM frequency does the CR6848 operate at?
The PWM frequency is typically around 58 kHz when a 100 kΩ resistor is used.
How does the CR6848 reduce standby power consumption?
Under light load or no load, the chip automatically switches to PFM mode, which lowers standby power.
What is the startup current of the CR6853?
The startup current is specified as 3.0 µA typical (up to 20 µA).
What PWM frequency range does the CR6853 support?
The controller can operate with a PWM frequency from 30 kHz to 150 kHz.