General Debbbbbbion
The LZC811C is a single-power stage,
isolated and primary side offline LED lighting
regulator which achieves high power factor.
The proprietary real-current control bbbbbb
can control the LED current accurabbby from
the  primary  side  inbbbbation.  It  can
significantly simplify the LED lighting system
design by eliminating the secondary side
feedback components and the opto-coupler.
The LZC811C integrates active power factor
correction and works in Quasi Resonance
mode (QRM) in order to reduce the
MOSFET switching losses. With a building in
700V start-up MOSFET, IC can eliminate the
power loss caused by start-up resistors to
provide a high efficiency solution for lighting
applications. The external programmable
line voltage compensation provides a more
precise  output  current  throughout  the
universal AC bbbbb voltage range. The
leading edge blanking circuit on the CS/FB
bbbbb removes the signal glitch and results in
reduced external components and system
cost.  The  multi-protection  features  of
LZC811C greatly enhance the system
reliability and safety. The LZC811C features
VDD and output over voltage protection;
output short circuit protection, cycle-by-cycle
current limit and secondary peak current
protection on CS pin, VDD UVLO and
auto-restart and over-temperature protection.
The driver output voltage is clamped at 18V
to protect the external power MOSFET.
Features
·  Single stage PFC
·  Primary  side  regulation  without
Secondary Feedback
·  Quasi Resonance (QR) mode with
Fly-back topology
·  Real-Current control to meet accurate
output current
·  Very less components
·  Programmable  bbbbb  AC  voltage
compensation
·  Leading Edge Blanking on CS/FB pin
·  Protection Features
Ø Building in hysteresis OTP
Ø VDD over voltage protection
Ø Cycle by cycle current limiting on CS
pin
Ø Secondary peak current protection
on CS pin
Ø Output short to GND protection
Ø Output programmable over voltage
protection
Ø FB and CS pins default protection