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LOZEN TECHNOLOGY

LZC811 Datasheet Preview

LZC811 Datasheet

PSR & PFC LED Driver Controller

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LZC811
PSR & PFC LED Driver Controller
General Description
Fly-back topology
The LZC811 is a single-power stage, Real-Current control to meet accurate
isolated and primary side offline LED lighting
output current
regulator which achieves high power factor. Very less components
The proprietary real-current control method Programmable input AC voltage
can control the LED current accurately from
compensation
the primary side information. It can Leading Edge Blanking on CS/FB pin
significantly simplify the LED lighting system Protection Features
design by eliminating the secondary side
Building in hysteresis OTP
feedback components and the opto-coupler.
VDD over voltage protection
The LZC811 integrates active power factor
Cycle by cycle current limiting on CS
correction and works in Quasi Resonance
pin
mode (QRM) in order to reduce the
Secondary peak current protection
MOSFET switching losses. With a building in
on CS pin
700V start-up MOSFET, IC can eliminate the
Output short to GND protection
power loss caused by start-up resistors to
Output programmable over voltage
provide a high efficiency solution for lighting
protection
applications. The external programmable
FB and CS pins default protection
line voltage compensation provides a more Application circuit
precise output current throughout the
universal AC input voltage range. The
leading edge blanking circuit on the CS/FB
input removes the signal glitch and results in
reduced external components and system
cost. The multi-protection features of
LZC811
VDD Gate
Comp CS
GND
FB
LZC811 greatly enhance the system
reliability and safety. The LZC811 features
VDD and output over voltage protection;
Fig 1 Application Circuit
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
Confidential
Page 1
Preliminary Ver:0.24




LOZEN TECHNOLOGY

LZC811 Datasheet Preview

LZC811 Datasheet

PSR & PFC LED Driver Controller

No Preview Available !

LZC811
PSR & PFC LED Driver Controller
Pin Assignment
NC
CMP
NC
FB
VDD
CS
DRV
GND
LZC811 Pin Assignment
Absolute Maximum Rating
Symbol
Parameter
VDD Maximum supply voltage on VDD pin
VFB Input Voltage to FB Pin
VCS Input Voltage to CS Pin
VCMP
Input Voltage to CMP Pin
ESD Capability
TMax
HBM Model
Machine Model
Maximum Operating Junction Temperature3
TSTG
Storage Temperature Range
Rating
28.0V
-0.3V to 6.0V
-0.3V to 6.0V
-0.3V to 6.0V
>2000V
>200V
125oC
-55oC to 150oC
Confidential
Page 2
Preliminary Ver:0.24


Part Number LZC811
Description PSR & PFC LED Driver Controller
Maker LOZEN TECHNOLOGY
Total Page 9 Pages
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