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PDF ( 数据手册 , 数据表 ) LZC811

零件编号 LZC811
描述 PSR & PFC LED Driver Controller
制造商 LOZEN TECHNOLOGY
LOGO LOZEN TECHNOLOGY LOGO 


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LZC811 数据手册, 描述, 功能
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







LZC811 pdf, 数据表
LZC811
PSR & PFC LED Driver Controller
Reference Application Schematic
T2
43
104/ 310VAC 2
C2
1
30mH
24
T3
2mH
13
R6 R7
510K
F1
2A/300V
510K
L1 1.5mH
3
D2
+ DF1506
12
R2010K
C1
102nF
R2
240K D3
-
MOV1 4
10D471
R3
200K
C4
FR107
D4
0.1uF/630V
FR107
6 U1
C5
22uF/50V
1
C6
VDD
FB
COMP
DRV
VSS
CS
2
5 R8
3
220nF
4 LZC811
4.7K
R9
R5
22K
10R
R11
1.5R
11
L2 N1
T1
1
2
4
5
D1
6
UF304
EDR2010
8
VS
C3 4
100uF/63V
T4
3
21
200uH
Q2
4N80
R10
1.5R
C7
222/ 300V
Input: AC90 280V
Output: 38V@420mA
LED+1
1
LED-1
1
Confidential
Page 8
Preliminary Ver:0.24














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