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代替RT7331 ZCC7331可调光初级调整LED驱动器
资料介绍
ZCC7331S是可調光定電流LED驅動器，它以準諧振模式工作，具有較高的效率表現。它使用初級側調整方式對輸出電流進行精確調節，無需使用次級側分流式調節器和光電耦合器，構成系統的元件數量少，成本低，節省板面空間。
ZCC7331S支援使用類比信號進行調光操作，其輸出電流可用DIM端子上的PWM信號占空比或是平均值進行調節。
ZCC7331S具有眾多的保護功能以確保產品的強壯，其中包括LED開路保護、LED短路保護、輸出二極體短路保護、VDD欠壓鎖定保護、VDD過壓保護、超載保護、輸入欠壓/過壓保護、內部過熱保護和逐週期電流限制保護
部分文件列表
| 文件名 | 大小 |
| ZCC7331替代RT7331.pdf | 3M |
部分页面预览
（完整内容请下载后查看）Primary-Side Regulation Dimmable LED Driver Controller
with Active-PFC
General Description
Features
The ZCC7331 is a dimmable constant current LED driver
with active power factor correction. It suppoZCCs high
power factor across a wide range of line voltages, and
it drives the conveZCCer in the Quasi-Resonant (QR)
mode to achieve the higher efficiency. By using
Primary Side Regulation (PSR), the ZCC7331 controls
the output current accurately without a shunt regulator
and an opto-coupler at the secondary side, reducing
the external component count, the cost, and the
volume of the driver board.
Tight LED Current Regulation
SmaZCC CC/CV Mode Control
Wide Dimming Range (1% to 100%)
Power Factor Correction
THD Optimization (THD < 10%)
Quasi-Resonant (QR) Operation
Fast StaZCCup
Adjustable CV level
Soft Drive for the Better EMI Performance
Multiple Protection Features
The ZCC7331 is compatible with the analog dimming.
The output current can be modulated by the PWM duty
ratio or the average level of DIM pin.
LED Open-Circuit Protection
LED ShoZCC-Circuit Protection
Over Load Protection
The ZCC7331 embeds comprehensive protection
functions for robust designs, including LED open-circuit
protection, LED shoZCC-circuit protection, output diode
shoZCC-circuit protection, VDD Under-Voltage Lockout
(UVLO), VDD Over-Voltage Protection (VDD OVP),
over load protection, input under / over voltage
Input Under / Over Voltage Protection
Output Diode ShoZCC-Circuit Protection
VDD Under Voltage Lockout
VDD Over Voltage Protection
External / Internal OTP
protection, external
/
internal Over-Temperature
Cycle-by-Cycle Current Limitation
Protection (OTP), and cycle-by-cycle current limitation.
Applications
AC-DC LED Lighting Driver
Simplified Application Circuit
Flyback Application Circuit
Buck-Boost Application Circuit
DOUT
BD
-
+
TX1
BD
F1
TX1
F1
COUT
VOUT
-
COUT VOUT
AC
input
AC
CIN
CIN
input
DOUT
+
RST
RST
DAUX
DAUX
VDD
VDD
MULT
MULT
CVDD
CVDD
ZCC7331
ZCC7331
RMULT
RMULT
Q1
Q1
COMP
GATE
COMP
GND
GATE
RDMAG1
RDMAG1
RGS
RGS
CCOMP
CCOMP
RPC
RPC
GND
CS
CS
RCS
RCS
Dimming signal
DIM
Dimming signal
DIM
DMAG
DMAG
RDMAG2
RDMAG2
1
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