Lzc8650c Ic Datasheet Pdf Online
Loop compensation pin; requires an external RC network for stability .
Chip power supply pin. Features Under-Voltage Lockout (UVLO) protection.
: As the primary MOSFET switches, the auxiliary winding of the flyback transformer mirrors the secondary output voltage state.
: Monitors peak primary MOSFET current pulse-by-pulse via a high-precision shunt resistor. Features built-in Leading-Edge Blanking (LEB). 4 GND Ground Reference : Combined signal and power return path. 5 DRV
: The CS pin continuously limits the maximum peak current flowing through the power MOSFET, preventing transformer saturation.
operates as a primary-side controller, meaning it does not require an opto-coupler for feedback, which simplifies design and reduces cost. lzc8650c ic datasheet pdf
Output of the internal error amplifier; a capacitor is placed here to stabilize the control loop.
The LZC8650C is a compact power/LED control IC designed for low-voltage consumer electronics. It integrates regulated drive and protection features to simplify LED array or backlight designs, offering high efficiency and stable current regulation across a range of input voltages.
Feedback/Compensation Pin. Connects to the auxiliary winding through a resistor divider to sense output voltage.
The internal layout of the LZC8650C relies on an accurate operational threshold to prevent damage while ensuring a and Total Harmonic Distortion (THD) below 10% . Parameter Type Parameter Name Technical Value / Rating Power Supply VDDcap V sub cap D cap D end-sub Supply Voltage ( VDD_ONcap V sub cap D cap D _ cap O cap N end-sub VDD_OFFcap V sub cap D cap D _ cap O cap F cap F end-sub 19.8V (Typ) / 8.0V (Typ) Power Supply VDDcap V sub cap D cap D end-sub Over-Voltage Protection Threshold Power Supply Operating Current ( IOCcap I sub cap O cap C end-sub 1.5 mA (with CDRVcap C sub cap D cap R cap V end-sub Error Amplifier Operational Transconductance Amplifier ( VREFcap V sub cap R cap E cap F end-sub Driver Output Gate Drive Internal Clamp Voltage (
: Quasi-Resonance (QR) mode, which reduces MOSFET switching losses . Operating Temperature : Recommended junction range of -40∘Cnegative 40 raised to the composed with power C 125∘C125 raised to the composed with power C Voltage Range : Typical supply voltage (VDD) from Loop compensation pin; requires an external RC network
The datasheet for the LZC8650C IC provides a comprehensive overview of its features, specifications, and operating conditions. The datasheet in PDF format is a valuable resource for engineers, designers, and researchers working with this IC. Here's a summary of the key information typically found in the LZC8650C datasheet:
The LZC8650C is typically housed in an 8-pin package to accommodate advanced diagnostic and safety functions, such as dedicated input overvoltage protection and NTC-driven temperature thermal foldback. Pin Number Description CMP
: Eliminates the need for opto-couplers and secondary control circuits, simplifying the system design .
Eliminates the need for optocouplers and secondary-side control circuits, reducing component count and cost.
Automotive and industrial power solutions requiring over-voltage protection. : As the primary MOSFET switches, the auxiliary
(manufactured by Lozen Technology) is a high-performance, single-stage Primary Side Regulation (PSR) and Power Factor Correction (PFC) controller designed for LED lighting applications. It is widely used in offline AC/DC flyback and non-isolated Buck-Boost converters to achieve high efficiency and low cost by eliminating the need for an opto-coupler and secondary feedback. „Mouser Electronics“ Lietuva Key Specifications Operating Topology:
: Sets the temperature point where the IC dynamically reduces output current to prevent thermal runaway. Programmed via a single external NTC resistor. 8 OVP / LN Output/Analog
The LZC8650C is primarily utilized as a primary-side regulation (PSR) controller, meaning it regulates output current and voltage without requiring an optocoupler or a secondary feedback circuit. This reduces the total bill of materials (BOM) cost and increases the overall reliability of the power supply system. Key Technical Attributes:
The reference ground for all internal control loops.