SFL900BSGT [SIFIRST]
super-PFC/PSRTM Controller for LED Lighting;
| 型号： | SFL900BSGT |
| 厂家： | 
SIFIRST |
| 描述： | super-PFC/PSRTM Controller for LED Lighting 功率因数校正 |
| 文件： | 总2页 (文件大小：160K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SFL900B
super-PFC/PSRTM Controller for LED Lighting
FEATURES
GENERAL DESCRIPTION
◆ super-PFC/PSRTM Control Supports Both
SFL900B is a high performance, high power factor
flyback PWM controller special for LED lighting
applications. The IC adopts unique super-
Primary
Side
Regulation
(PSR)
and
Secondary Side Regulation (SSR)
◆ Pin Compatible with Popular PFC Controllers
◆ THD<10%using min-THDTM Technique
◆ Built-in AC Line and Load Compensation for
High Precision LED Output Current
PFC/PSRTM which can support both PSR and SSR
applications.
SFL900B is pin compatible with mainstream PFC
controllers such as XX6561/6562, XX7527, etc.
SFL900B also integrates proprietary min-THDTM,
technique, which can achieve less than 10% THD for
universal line input.
SFL900B has built-in Load CC Compensation and
AC Line CC Compensation functionwhich can
further increase LED output CC accuracy. The IC has
Max. 90KHz Frequency Clamping function and soft
totem pole Gate driver to improve system conduction
and radiation EMI. The IC will Clear External EA
Feedback Network before IC power on, which can
reduces startup LED current spike. The IC also has
Soft Start control dng power on period.
In SFL900B, the proprietary “Frequency Adjusting”
can help to ime THD performance, while ensures
audio noise free operation.
SFL900B integrates functions and protections of
Under Voltage Lockout (UVLO), LED Open/Short
Protection, VCC Over Voltage Protection (OVP),
Load Over Voltage Protection (Load OVP), Soft Start,
Cycle-by-cycle Current Limiting (OCP), Burst Mode
Control @ Light Loading, GD Clamping, VCC
Clamping, etc.
◆ Highly
Linear
Analog
Multiplier
with
“Frequency Adjusting” for High PF
◆ Max. 90KHz Frequency Clamping for EMI
◆ LED Open/Short Protection
◆ Burst Mode Control @ Light Loading
◆ Trimmed 1.5%Internal Voltage Reference
◆ Very Low Startup Current
◆ Under Voltage Lockout with 11.7V Hysteresis
◆ Built-in Soft Start
◆ Clear External EA Feedback Network before
Power On
◆ Cycle-by-Cycle Current Limiting
◆ Built-in Leading Edge Blanking (LEB)
◆ VCC Over Voltage Protection (OVP)
◆ Audio Noise Free Operation
◆ 10V to 32V Wide Range of VCC Voltage
◆ 500mA Drive Capability
APPLICATIONS
◆ LED Lighting Application
SFL900B is available in SOP-8 and DIP-8 packages.
TYPICAL APPLICATION (PSR Application)
EMI
Filter
SFL900B
1
8
FB
VCC
COMP
MULT
GD
2
3
7
6
GND
4
5
CS
DEM
©SiFirst Technology
- 1 -
Confidential
SiFirst_DS_900B_V1.0
SFL900B
TYPICAL APPLICATION (SSR Application)
EMI
Filter
VCC
MULT
FB
GATE
DEM
SFL900B
CS
GND
COMP
SFL100
Pin Configuration
VCC
GD
1
2
3
4
8
7
6
5
FB
DIP8/
SOP8
COMP
MULT
CS
GND
DEM
Comparison between SFL900 and SFL900B
Parameter or Function
SFL900
SFL900B
VDD UVLO(ON)/(OFF)
Recommended Loop
17V/9V
100nF
20.7V/9V
1uF
Compensation Capacitor between
FB pin and COMP pin
Ordering Information
Part Number
SFL900BSG
SFL900BSGT
SFL900BDP
Top Mark
Package
Tape & Reel
SFL900BSG
SFL900BSG
SFL900BDP
SOP8
SOP8
DIP8
Green
Green
RoHS
Yes
©SiFirst Technology
- 2 -
Confidential
SiFirst_DS_900B_V1.0
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