CYT3000B Datasheet PDF – Voltage LED Driver Chip – CYT

Part Number : CYT3000B

Function : High power factor linear constant current high voltage LED driver chip

Package : ESOP-08 Type

Manufactures : CYT Opto-electronic ( )


Description :

The CYT3000B is a high power factor linear constant current high voltage LED driver chip, used in LED lighting field. The chip through a unique constant current control patented technology to achieve constant current accuracy of less than ± 5%, the output current can be adjusted by an external resistor Rt, the chip has a high power factor and low harmonic distortion.

The CYT3000 has the output current with temperature automatic adjustment function. When the temperature is too high the system will reduce the output current, in order to achieve the effect of lowering the temperature, the temperature protection point can be set by the external resistance of the pin RTH side.

CYT-3000B with input power automatic adjustment function, when the input voltage is too high, it will reduce the output current, the amplitude of the current reduction set by external resistor RD, in order to ensure that the input power does not vary with the input voltage.





1. No transformer and electrolytic capacitors are required

2. Integrated high-voltage start power supply

3. The output current is adjustable up to 80mA

4. Inter-chip current deviation <± 5%

5. Efficiency : > 90%

6. Power factor> 0.95

7. THD : <20%

8. With automatic temperature adjustment function

9. With power automatic adjustment function

10. Chip application system without EMI problems


Official Homepage :


CYT3000B Datasheet PDF


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W210 Datasheet PDF – Spread Spectrum FTG – Cypress

Part Number : W210

Function : Spread Spectrum FTG for VIA K7 Chipset

Package : 48-pin SSOP

Manufactures : Cypress Semiconductor




The W210 was developed as a single-chip device to meet the clocking needs of VIA K7 core logic chip sets. In addition to the typical outputs provided by a standard FTG, the W210 adds a thirteenth output buffer, supporting SDRAM DIMM modules in conjunction with the chipset.
Cypress’s proprietary spread spectrum frequency synthesis technique is a feature of the CPU and PCI outputs. When enabled, this feature reduces the peak EMI measurements of not only the output signals and their harmonics, but also of any other clock signals that are properly synchronized to them.

Block Diagram :

W210 datasheet Block Diagram

Features :

• Maximized EMI Suppression using Cypress’s Spread Spectrum technology

• Single-chip system frequency synthesizer for VIA K7 chipset

• One pair of differential CPU outputs for K7 Processor

• One open-drain CPU output for VIA K7 chipset

• Six copies of PCI output

• One 48-MHz output for USB

• One 24-MHz or 48-MHz output for SIO

• Two buffered reference outputs

W210 Datasheet


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