Protects the output against GND shorts.
The is a high-performance, single-stage flyback and Power Factor Correction (PFC) controller integrated circuit (IC) primarily designed for LED lighting applications. This IC is often utilized in high-power LED drivers (ranging from 45W to 110W) due to its efficiency and primary-side regulation (PSR) capabilities, which eliminate the need for secondary feedback circuits. Key Features and Benefits
: Prevents erratic startup behavior by ensuring the IC only operates when VDD passes its minimum turn-on voltage threshold. Typical Application Circuit
Typically achieves a power factor >0.95 and low Total Harmonic Distortion (THD < 10%) at standard AC voltages. Quasi-Resonant Mode (QRM):
: Quasi-Resonant Mode (QRM) to significantly reduce MOSFET switching losses. lzc8650c ic datasheet pdf
Pin 8 acts as a guard against primary AC surges. If the line voltage rises past safe operational thresholds, it cuts off the driver stage until safe operating bounds resume. Typical Application Circuit and Design Guide
For engineers and technicians, the single most important document is the . This document contains all the electrical characteristics, pin configurations, thermal data, and application circuits necessary to integrate the IC into a design successfully.
: Provides high power isolation to protect systems from electrical hazards . Core Features
A typical circuit includes the LZC8650C controller, an external Power MOSFET, a flyback transformer, and input rectification components. 6. Protection Features Protects the output against GND shorts
: Shuts down the gate driver if the supply voltage exceeds safe functional thresholds.
For engineers, the is more than a list of numbers; it is the blueprint for product success.
: Single-stage flyback with active Power Factor Correction (PFC).
If Vref = 0.2V and desired Iout = 1.5A, then Rsense = 0.2 / 1.5 = 0.133Ω (use standard value 0.13Ω). Key Features and Benefits : Prevents erratic startup
) to stabilize internal operations. Pair this with an electrolytic bypass capacitor (e.g., 10 F) to handle initial startup currents. Sense Resistor ( RCScap R sub cap C cap S end-sub
The IC ensures that the input current follows the input voltage, creating a high power factor, essential for meeting international regulations (e.g., Energy Star, CE). 5. Typical Application Circuits Go to product viewer dialog for this item.
| Pin | Name | Type | Description | | :-- | :--- | :--- | :--- | | 1 | CMP | I | Loop compensation for CC/CV control. Connect an RC network to ground. | | 2 | FB | I/O | Zero-crossing detection. Also integrates line compensation and over-voltage protection. | | 3 | CS | I | Current sense input. Monitors voltage across a resistor connected to the MOSFET source. | | 4 | GND | PWR | System ground and power ground. | | 5 | DRV | O | Gate driver output for the external MOSFET. Internally clamped at 16V. | | 6 | VDD | PWR | Power supply for the IC. | | 7 | OTP | I | Current fold-back temperature point setting. | | 8 | OVP | I | Input line over-voltage protection setting. |
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.
If you're unable to find the datasheet, I can try to provide some general information about the lzc8650c ic. Can you please tell me what you know about this IC, such as:
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