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參數資料
| 型號： | HV9931 |
| 廠商： | Supertex, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | UNITY POWER FACTOR LED LAMP DRIVER |
| 中文描述： | 單位功率因數LED燈驅動器 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 516K |
| 代理商： | HV9931 |
HV9931
Initial Release
HV9931 Unity Power Factor LED Lamp Driver
1
NR081505
Features
Constant Output Current
Large Step-Down Ratio
Unity Power Factor
Low Input Current Harmonic Distortion
Fixed Frequency or Fixed Off-Time Operation
Internal 450V Linear Regulator
Input and output current sensing
Input Current limit
Enable, PWM and Phase Dimming
Applications
Offline LED Lamps and Fixtures
Street lamps
Traffic Signals
Decorative Lighting
General Description
The HV9931 is a fixed frequency PWM controller IC designed
to control an LED lamp driver using a single-stage PFC
buckboost-buck topology. It can achieve a unity power factor
and a very high step-down ratio that enables driving a single
high-brightness LED from the 85-264VAC input without a
need for a power transformer. This topology allows reducing
the filter capacitors and using non-electrolytic capacitors to
improve reliability. The HV9931 uses open-loop peak current
control to regulate both the input and the output current. This
control technique eliminates a need for loop compensation,
limits the input inrush current, and is inherently protected
from input under-voltage condition. Capacitive isolation
protects the LED Lamp from failure of the switching MOSFET.
HV9931 provides a low-frequency PWM dimming input that
can accept an external control signal with a duty ratio of 0-
100% and a frequency of up to a few kilohertz. The PWM
dimming capability enables HV9931 phase control solutions
that can work with standard wall dimmers.
Typical Application Circuit
V
IN
GATE
CS1
CS2
V
DD
PWMD
RT
GND
R
ref2
R
ref1
R
CS1
R
CS2
C2
V
IN
L1
L2
C1
Q1
D3
R
S1
R
S2
D4
VO
+
-
D1
D2
~AC
~AC
C
IN
RT
HV9931
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HV9931_07 | 制造商:SUPERTEX 制造商全稱:SUPERTEX 功能描述:HV9931 Unity Power Factor LED Lamp Driver |
| HV9931DB1 | 功能描述:電源管理IC開發工具 LED DRIVER DEMOBOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| HV9931DB2 | 功能描述:LED 照明開發工具 LED DRIVER DEMOBOARD RoHS:否 制造商:Fairchild Semiconductor 產品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
| HV9931DB4 | 制造商:Supertex Inc 功能描述: |
| HV9931DB5 | 功能描述:電源管理IC開發工具 DOUBLE-BUCK LED DEMOBOARD RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
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