Within 30W active PFC non isolated (fully compatible with SY5814 replacement).rar
General Description of CSC8818
CSC8818 is a LED for lighting and with the development of PFC buck LED drive control chip.And the use of quasi resonant mode, in order to obtain a higher efficiency, and meet therequirements of power factor. CSC8818 has a chip power supply undervoltage lockout (OLP),LED open circuit protection, output short circuit protection (SCP) and thermal protection(OTP) protection function.
●The CSC8818 has high ratio of performance and price, scheme has low cost, small size
● high power factor (0.960 @220Vac, full load)
● high efficiency (93%@220Vac, full load)
● high precision linear adjustment rate (± 0.5%@176Vac~265Vac)
● high precision load adjustment rate (± 0.8%@220Vac, Vo:37V~80V)
Features of CSC8818
● The built-in PFC, high PF, low THD.
● Up to 95% efficiency.
● Zero current detection, quasi resonant switching technology
● The output current accuracy of ± 3% LED
● 0.3V current sense reference voltage, low resistance and therefore reduce the loss.
● LED short circuit protection and reliable and open circuit protection
● Ultra low starting current (14uA)
● Ultra low (10mA) working current
● FB feedback high resistance, low power consumption
● LED short circuit protection and reliable and open circuit protection
● The current sampling resistor short-circuit or open circuit protection
● Saturation of transformer protection
● By the current of the primary side cycle current limit
● The SOT23-6 package
Applications of CSC8818
● GU10/E27 LED bulb lamp, lamp
● LED PAR30/PAR38
● LED fluorescent lamp
● Other LED lighting
Pin Configurations of CSC8818
![SOT23-6,CSC8818封装,SY5814封装](/Public/common/script/ueditor/php/upload/20130410/1365588249660.jpg)
Pin Description of CSC8818
Pin Number
| Pin Name
| Description
|
1
| ISEN
| The current detection: sampling switch current, resistor to ground |
2
| GND
| Grounding system
|
3
| COMP | An external resistor capacitor to ground, the control loop of the whole system stability
|
4
| ZCS | Zero current detection, at the same time voltage when the foot is more than 1.4V and the maintenance of 700ns, the function of overvoltage protection will open |
5
| VIN | Gate drive to the external MOSFET
|
Typical application diagram CSC8818:
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