1. General description
The SSL2115X is a low-cost non-dimmable LED driver IC. It is designed to drive LEDs in
isolated flyback or non-isolated buck-boost topologies. The device includes a high-voltage
power switch and a circuit enabling start-up directly from the rectified mains voltage. It has
a good controlled output current.
2. Features and benefits
Compact solution with a small form factor and a low component count
Ease of integration
Primary side sensing (no optocoupler required)
True current source behavior:
LED current independent of mains voltage, LED voltage and temperature variation
LED current accuracy (10 %)
Line regulation: 3 % at 230 V 10 %
Load regulation: 3 % between 0.5 U
max
and 0.85 U
max
Efficiency up to 86 % depending on the application
Power Factor 0.6 or ~0.9 using valley fill
Low ripple current < 1 %
Internal protections:
OverTemperature Protection (OTP)
LED short protection (I
OUT
(0 V – V maximum) at a constant level)
LED open protection
UnderVoltage LockOut (UVLO)
Internal supply voltage generation enabling start-up from the rectified mains voltage
SO7 package
SSL2115X
Low-cost non-dimmable LED driver IC
Rev. 2 — 7 June 2012 Product data sheet
