C2173 Description
C2173 Datasheet Primary Side Sensing SMPS Controller.
C2173 Key Features
- Advanced primary sensing control circuitry achieves accurate voltage and current (CV and CC) regulation
- Bipolar junction transistor (BJT) primary switch enables ultra low BOM cost design solutions
- Fast start-up performance without additional active ponents for low BOM cost
- Adaptive base and emitter switching extends RBSOA
- Less than 30 mW no-load power with less than one second turn-on delay and class leading load-transient performance
- Output transient detection (TD) function for very low no-load power
C2173 Applications
- Optimised PWM/PFM with quasi resonant switching enables efficiency standards pliance with margin
- Frequency dithering algorithm allows EMI pliance with margin
- Enables fully pliant solutions for “MoU” universal USB chargers o o Optimised control of the primary switch drive for low EMI and pliance to EN 301 489-34 Inher
- Full featured protection includes o Single fault o Output over-voltage and short-circuit o Input under-voltage