Lzc8650c Ic Datasheet Pdf ((free))

You can try searching for the datasheet on the following websites:

  1. Manufacturer's website: Try searching for the manufacturer of the IC, such as ON Semiconductor, Texas Instruments, or other prominent semiconductor companies.
  2. Datasheet search engines: Websites like Datasheet4U, Alldatasheet, or Digikey often have extensive collections of datasheets.
  3. Online marketplaces: You can also try searching on online marketplaces like Alibaba or Amazon, although be cautious when sourcing components from these platforms.

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The LZC8650C is a Primary-Side Regulation (PSR) controller designed for offline AC/DC flyback power converters, specifically targeting LED lighting applications. Manufactured by Lozen Technology (菱奇半导体), this IC is known for achieving a high power factor and accurate real-current control. Technical Overview Package Type: SOP-8 (8-pin Surface Mount).

Application: High-power isolated LED drivers, typically used in LED bulbs and tube lighting.

Control Method: Primary-side modulation (PSR), which eliminates the need for an optocoupler and secondary-side control circuitry, reducing cost and size. Key Performance Specifications

Based on typical configurations for this series (including related models like DIO8650C or LZC8620): Supply Voltage ( VDDcap V sub cap D cap D end-sub ): Typically operates between 9.5V and 27V. Maximum VINcap V sub cap I cap N end-sub /Drive: Up to 33V. lzc8650c ic datasheet pdf

Power Dissipation: Approximately 1.1W for the SOIC-8 package.

Thermal Resilience: Rated for junction temperatures from -40°C up to 125°C. Protection Features

The LZC8650C integrates several safety mechanisms to ensure driver longevity:

Input Protection: Over-voltage (OVP) and under-voltage (UVP) protection.

Thermal Management: Built-in hysteresis Over-Temperature Protection (OTP) and an output current foldback feature that reduces current as temperature rises.

Fault Protection: Output short-to-ground protection and cycle-by-cycle current limiting on the CS pin. You can try searching for the datasheet on

Temperature Compensation: Supports external NTC resistor connection for precise thermal adjustment. Pin Configuration (SOP-8) Description COMP Loop compensation for constant current regulation. FB Feedback pin; detects zero current to regulate output. CS

Current sense pin; connects to a resistor to sense MOSFET current. GND Power ground. DRV

Gate drive output for the external power MOSFET (clamped at 16V). VDD Power supply input. TS Temperature compensation point setting. RN NTC resistor connection for thermal compensation.

For the full technical manual, you can view the LZC8620 series reference or check the manufacturer's product page at Lozenic.

6. Functional Description

Part 7: Frequently Asked Questions (FAQ) about the LZC8650C Datasheet

Q1: Is the LZC8650C compatible with the more common PT4115 or AL8860? A: In many cases, the pinout and functionality are similar. However, the feedback voltage (Vref) may differ (e.g., 0.1V vs. 0.2V), which changes Rsense values. Always consult the LZC8650C IC datasheet PDF for exact values.

Q2: Can I use this IC to charge a battery? A: No. The LZC8650C is designed for constant current output to LEDs. It is not a battery charger IC (which requires constant current/constant voltage switching). The datasheet will not include a charging algorithm. Manufacturer's website : Try searching for the manufacturer

Q3: Where can I download the datasheet without registration? A: Try the “Datasheet (PDF)” link on LCSC’s product page or UTSOURCE. Many Asian distributors provide free, immediate downloads.

Q4: What is the difference between LZC8650C and LZC8650B? A: The “C” revision typically has improved thermal performance or higher switching frequency. Only the latest datasheet revision will document these differences.

Step 2: Search Authorized Distributors

Major distributors like Mouser, Digi-Key, LCSC, or Newark often host datasheets directly from the manufacturer. Use their search bar with the exact part number. These PDFs are verified and virus-free.

1. Overview: The Role of the LZC8650C

The LZC8650C is typically categorized as a High-Precision LED Constant Current Driver IC. It is designed to operate in Buck, Buck-Boost, or other tapped-inductor topologies.

Unlike a simple linear regulator, the LZC8650C utilizes a high-frequency switching architecture. Its primary objective is to drive LED strings with a constant current regardless of input voltage fluctuations or changes in the LED string's forward voltage due to temperature. This ensures consistent luminosity and extends the lifespan of the LED emitters.

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.

2. Thermal Characteristics

Without proper thermal design, the LZC8650C will enter thermal shutdown or fail prematurely. The datasheet provides: