EC4188B Datasheet, PDF (1/10 Pages) E-CMOS Corporation – High Power Factor & Accuracy Constant Current LED Driver

High Power Factor & Accuracy Constant
Current LED Driver
EC4188B
General Description
The EC4188B is a highly-integrated, low startup
current, average current mode, one cycle control
PFC and fixed switching frequency PWM controller.
These functions enable the LED driver to easily
meet the accuracy average LED current
and high power factor requirements. The
integrated functions also include the LED short
protection, open protection, and internal over
temperature protection. The COMP pin controls
the duty by connected an RC compensation
network to ground and forming the closed loop
feedback control. To protect the external power
MOSFET from being damaged by supply over
voltage, the EC4188B OUT pin voltage is
clamped to about 15V.
The EC4188B improves the performance and
reduces the cost of the LED driver. It is a 6-pin
SOT23-6L package.
Pin Assignments
Features
●High Power Factor by One Cycle Control
●Accuracy Constant Current
●Low BOM Cost
●Linear Dimming on DIM Pin
●Average Current / Fixed Frequency Control
●Gate Output Voltage Clamp
●LED Open Protection (OVP)
●LED Short Protection (SCP)
●Over Current Protection (OCP)
●Internal OTP Protection
●300mA Driving Capability for OUT Pin
●Fast Start Current
●Incompatible Electronic Ballast and Inductance
Ballast
Applications
● E26/27, T8 LED Tube
● Others LED Lighting Applications
Pin Description
Pin No.
1
2
3
4
5
6
Name
VCC
GND
OUT
DIM
COMP
CS
Function
Power Supply Pin
Ground Pin
The Output Driver for Driving The External MOSFET
Dimming Control Pin by Input a DC Voltage
Feedback Compensation Network
Current Sense Pin, Connect to Sense The MOSFET Current
E-CMOS Corp. (www.ecmos.com.tw)
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4C26N-Rev.P001