The LZC8650C is often used in 45W to 110W LED drivers and features the following typical ratings (based on the similar and LZC8620 series): Package Type : SOP-8 (8-pin Surface Mount). Supply Voltage ( VINcap V sub cap I cap N end-sub ) : Typically recommended between 9.5V and 27V. Operating Temperature : Industrial range from -40∘Cnegative 40 raised to the composed with power C +125∘Cpositive 125 raised to the composed with power C
Measure the voltage at Pin 6 (VDD) . If the voltage never climbs to 19.8V, check for an open circuit in the high-voltage startup resistors or a shorted VDD bypass capacitor.
Dual electrolytic networks rated for high temperature (typically lzc8650c ic datasheet pdf
(often referred to as LZC8650) is a single-stage, high-precision primary-side offline LED lighting regulator with built-in power factor correction (PFC). „Mouser Electronics“ Lietuva Key Technical Specifications According to documentation from Prism Electronics and similar technical datasheets
Integrates active PFC to meet stringent power quality standards. The LZC8650C is often used in 45W to
Optimizes power conversion to minimize heat dissipation.
) to swing down to its minimum value (the valley) before initiating the next conduction cycle. This drastically minimizes capacitive turn-on switching losses and lowers electromagnetic interference (EMI) signatures. 3. Four-Stage Temperature Foldback (OTP Pin) If the voltage never climbs to 19
The LZC8650C stands out as a highly capable and cost-effective engine for modern high-PF LED lighting designs. By implementing critical functions like Boundary Conduction Mode, active multiplier-based PFC, and comprehensive circuit protection in a compact SOP-8 package, it simplifies the design loop for power supply engineers while optimizing overall luminaire efficiency. When working with this IC, always consult the official manufacturer datasheet PDF for precise electrical parameter boundaries, thermal coefficients, and specific application layout rules.
: Internal thermal sensors shut down the IC if internal temperatures exceed safe operating limits, preventing thermal runaway. 6. Typical Application Circuit Design Notes
Output pin connected to the gate of an external power MOSFET to handle switching.
Unlike hard thermal-shutdown controllers that completely cut off light outputs when hot, the LZC8650C utilizes a progressive, . Designers attach an NTC thermistor to the OTP/TS pin. When local enclosures heat up: The IC monitors the dropping resistance on the OTP pin.