DESCRIPTION
MT7815B is a high precision LED constant
current controller operating at critical conduction
mode (CRM) with zero current switched-on and
peak current switched-off. It’s mainly targeted for
non-isolated buck LED power systems and
PWM/Analog dimmable application.
Critical conduction mode ensures that the
MT7815B turns on the internal switch when the
inductor current reaches zero, reducing the
switch-on switching losses, and achieving more
than 93% efficiency.
With critical conduction mode, and the input
compensation, MT7815B outputs high accuracy
LED current, and further achieves excellent line
regulation and load regulation.
MT7815B has wide working voltage range, which
is suitable for full-range AC input or 12V ~ 500V
DC input voltage. MT7815B provides various
protection features to improve the system
reliability, including over current protection (OCP),
short circuit protection (SCP), adjustable over
voltage protection (OVP) and over temperature
regulation (OTR), etc.

FEATURES
Critical Conduction Mode, insensitive to the
inductance
PWM/ Analog dimming function
High efficiency (up to 93%)
Highly accurate constant LED current
Cycle-by-cycle current limiting
LED short circuit protection
Adjustable LED over voltage protection
Leading edge blanking technique
Under-voltage lockout (UVLO) protection
Over temperature regulation (OTR)
Available in SOT23-6 package

APPLICATIONS
LED tube, signal lamp, landscape lamp
LED stage light, etc
Intelligent LED lighting application