EC4215 Datasheet, PDF (1/6 Pages) E-CMOS Corporation – Constant Current LED Driver with PWM Dimming

Constant Current LED Driver with
PWM Dimming
EC4215
FEATURES
• Universal Input Voltage Range of 120VAC±16%
or 230VAC±16%
• Adjusted Constant Current Operation
• Low Quiescent Current
• Simplifies Circuit and System Designs
• Compact Component Count
• Temperature Compensated Constant Current
• Over Current Protection
• Over Temperature Protection
• LED Current Thermal Foldback for Thermal
Protection
• PWM Dimming Control
• DFN-8L Exposed Pad Package
APPLICATIONS
• LED Driver
• Lighting Applications
• Lamp Indicators
• Candle Light
• Low Cost solution
• Constant Current Sink
TYPICAL APPLICATION CIRCUIT
GENERAL DESCRIPTION
The EC4215 is a constant current linear high
voltage LED driver for replace discrete solutions in
AC/DC power application (up to 270VAC). The
device can drive an output power of ±10% variation
from a universal input voltage range of
120VAC±16%, or 230VAC±16% for different LED
strings. The solution eliminates the need of
individual components by combining them into a
single package, which results in a significant
reduction of both system cost and board space.
The EC4215 can as a constant current sink for high
voltage LED or low voltage LED strings in series.
For higher current application, multiple EC4215s
can also be used in parallel such as 60mA, 80mA
or 160mA. The EC4215 is capable of a dimming
input for adjustable LED brightness control by
Pulse Width Modulation (PWM). The EC4215 is
self-protected against over temperature and over
current. Internal thermal foldback function regulates
LED driving current automatically to limit die
temperature during high power operation or high
ambient temperature conditions. These features
provide maximum system protection for the
demanding lighting applications. The EC4215 is
available in a space saving DFN-8L exposed pad
package, and the operating temperature is from –
40°C to +125°C.
＋
AC
BR1
R₁
R₂
I_LED
1
2 ^VFF
VIN
3 _DIM
4 _REXT
R_EXT
8
LED
7
GND
GND ⁶
GND ⁵
V_LED
－
Fig. 1 Simplified Application Circuit
E-CMOS Corp. (www.ecmos.com.tw)
1/6
3D08N Rev. F001