Lzc8650c Ic Datasheet Pdf ((link))

), it linearly reduces the output current at an , allowing the luminaire to stay illuminated at a lower brightness instead of failing completely.

The LZC8650C is packed with features that make it a highly attractive solution for modern LED drivers.

A: Try the “Datasheet (PDF)” link on LCSC’s product page or UTSOURCE. Many Asian distributors provide free, immediate downloads.

: Voltage on the CS pin is monitored continuously. If the current sense threshold passes 1.1V , the DRV output immediately shuts off to protect the switching transistor from saturation currents.

In a physical circuit configuration—such as a —the LZC8650C is regularly paired alongside an 8N70 TO-220F MOSFET and an EE22/13 magnetic core transformer .

: The CS pin continuously limits the maximum peak current flowing through the power MOSFET, preventing transformer saturation.

The IC senses the output current by monitoring the current flowing in the primary-side transformer winding while sampling the auxiliary winding voltage. It uses this information to infer the output current accurately, eliminating the need for a secondary side sensor. Power Factor Correction (PFC)

Many engineers assume a 20kHz PWM signal is fine for dimming. However, the LZC8650C’s DIM pin is optimized for 100Hz to 2kHz. Higher frequencies cause incomplete turn-on/off cycles and distorted brightness. The datasheet explicitly states the acceptable range.

: As the primary MOSFET switches, the auxiliary winding of the flyback transformer mirrors the secondary output voltage state.

Feedback pin; senses reflected voltage from auxiliary winding. CS

Monitors incoming rectified mains line voltage deviations to shut down operations safely under intense line surges. Architectural Circuit Features Primary-Side Regulation (PSR)