Within 30W active PFC isolated primary side feedback CSC8318 (compatible with SY5810 replacement).rar
General Description of CSC8318
CSC8318 is a used for high-power LED lighting drive flyback PFC control chip design. With the primary side feedback mode and quasi resonant switching technology, to realize the lowswitching loss to obtain higher efficiency. At the same time to meet the power factor requirements, fewer external components, saving cost for the user. CSC8318 also includes acyclical peak current detection, chip power supply undervoltage latch, LED open circuit protection (OLP), output short circuit protection (SCP) and thermal protection (OTP) etc..
Features of CSC8318
●The built-in PFC, high PF, low THD
●The primary side feedback constant current control, without the need for a secondary feedback circuit
●Chip power supply undervoltage latch and overvoltage protection
●The output current accuracy of ± 3% LED
●Critical conduction mode and zero current detection, quasi resonant switching technology
●Primary peak current control
●Ultra low starting current (14uA)
●Ultra low (10mA) working current
●Excellent line voltage regulation and load voltage regulation rate
●Output short circuit 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
●Chip power supply over / under voltage protection
●The SOT23-6 package
Applications of CSC8318
● GU10/E27 LED bulb lamp, lamp
● LED PAR30/PAR38
● LED fluorescent lamp
● Other LED lighting
Pin Configurations of CSC8318
Pin Description of CSC8318
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
| The power supply voltage, internal protection of an 18V, when the supply voltage is more than 18V, the protection of open, the power supply voltage is maintained at 18V. Both open circuit protection function, when the voltage is more than 18V, the open circuit protection function to open.
|
| 6 | DRV
| Gate drive to the external MOSFET
|
Typical application diagram CSC8318:
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