Pdf - Lzc8650c Ic Datasheet

(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:

Supports both isolated Flyback and non-isolated Buck-Boost circuits. Power Factor: is greater than 0.95 at 230VAC with Total Harmonic Distortion (THD) Switching Mode:

Operates in Quasi-Resonant Mode (QRM) to reduce MOSFET switching losses and improve efficiency. Supply Voltage ( cap V sub cap D cap D end-sub

Typical operating range is 9.5V to 27V, with an internal clamp at 16V for the gate driver. Startup Current: Extremely low, typically around „Mouser Electronics“ Lietuva Pin Configuration (SOP-8 Package) The LZC8650C typically comes in an 8-pin SOP-8 package: taoic.oss-cn-hangzhou.aliyuncs.com Description

Loop compensation for constant current and voltage control (connect RC network to ground). lzc8650c ic datasheet pdf

Zero-current detection (ZCD) and over-voltage protection (OVP).

Current sense pin; monitors MOSFET current via a precision resistor. System and power ground.

Gate driver output for the external power MOSFET; clamped at 16V. Power supply input.

Over-temperature protection; sets the current foldback temperature point. Input line over-voltage protection. Protection Features Thermal Management: What type of IC is it

Integrated four-stage temperature foldback function to protect the IC by reducing current as temperature rises. Voltage Protection: cap V sub cap D cap D end-sub

over-voltage protection (typically 27V) and input line over-voltage protection. Safety Guards:

Cycle-by-cycle current limiting on the CS pin and protection against output short circuits or open LED conditions. „Mouser Electronics“ Lietuva Documentation Links Full Datasheet (PDF): You can access the detailed LZC8650 Preliminary Datasheet via TaoIC. Alternative Source: A similar part, the DIO8650C Datasheet

, is available on Mouser for comparative performance metrics. „Mouser Electronics“ Lietuva or guidance on calculating the current-sense resistor values for your specific LED output? Once you give me those, I can draft

❓ Can you provide more context?

• What type of IC is it? (LED driver, voltage regulator, MCU, etc.)
• Manufacturer name (if known)
• Any partial specs you have

Once you give me those, I can draft a complete datasheet layout for you to save as a PDF.

1. General Description

The LZC8650C is a high-performance, isolated LED driver controller IC designed for offline AC-DC LED lighting applications. It is typically utilized in non-dimmable or dimmable LED bulb and tube light designs. The chip operates in Boundary Conduction Mode (BCM) or Critical Conduction Mode (CrM), offering a cost-effective solution for low-to-medium power LED drivers.

The device is engineered to provide high Power Factor Correction (PFC) and low Total Harmonic Distortion (THD), making it compliant with international lighting standards (such as ENERGY STAR and IEC 61000-3-2). Its ultra-low start-up current and proprietary control algorithms allow for high efficiency and reliable operation.

Protection Logic

• Over-Voltage Protection (OVP): If the feedback voltage exceeds the internal OVP threshold (often triggered by an open LED string), the driver shuts down the output pulses to protect the MOSFET and output capacitors.
• Short Circuit Protection (SCP): Detects a short across the output and disables the driver to prevent thermal damage.

3. Applications

• LED Lighting: T5/T8 LED tube lights, LED bulbs, and downlights.
• Industrial Lighting: Low-power industrial LED fixtures.
• Power Supplies: Low-power AC-DC converters requiring high power factor.

5. Electrical Characteristics (Absolute Maximum Ratings)

Stresses exceeding these ratings may cause permanent damage to the device.

| Parameter | Symbol | Value | Unit | | :--- | :--- | :--- | :--- | | VCC Supply Voltage | VCC | 30 | V | | Input Voltage (HV Pin) | V_HV | 600 | V | | Output Driver Voltage | V_OUT | 30 | V | | Operating Temperature | T_opr | -40 to +105 | °C | | Junction Temperature | T_j | +150 | °C |

(Note: Typical operating VCC range is roughly 10V to 25V. The device usually includes an internal Under-Voltage Lockout (UVLO) around 12V-14V).