900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Fairchild Semiconductor Electronic Components Datasheet

FL7730MY Datasheet

Single-Stage Primary-Side-Regulation PWM Controller

No Preview Available !

February 2012
FL7730MY
Single-Stage Primary-Side-Regulation PWM Controller
for PFC and LED Dimmable Driving
Features
Compatible with Traditional TRIAC Control
(No need to change existing lamp infrastructure:
wall switch & wire)
Compatible with Non-Dimming Lamp Designs
Cost-Effective Solution without Input Bulk Capacitor
and Feedback Circuitry
Power Factor Correction (PFC)
Accurate Constant-Current (CC) Control,
Independent Online Voltage, Output Voltage,
Magnetizing Inductance Variation
Line Voltage Compensation for CC Control
Linear Frequency Control for Better Efficiency and
Simple Design
Open-LED Protection
Short-LED Protection
Cycle-by-Cycle Current Limiting
Over-Temperature Protection with Auto Restart
Low Startup Current: 20μA
Low Operating Current: 5mA
Frequency Hopping for Better EMI Performance
SOP-8 Package Available
Application Voltage Range: 80VAC ~ 308VAC
Description
This highly integrated PWM controller, FL7730MY,
provides several features to enhance the performance
of single-stage flyback converters. The proprietary
topology, TRUECURRENT™, enables the simplified
circuit design for LED lighting applications.
TRIAC dimming is smoothly managed by dimming
brightness control without flicker. By using single-stage
topology with primary-side regulation, an LED lighting
board can be implemented with few external
components and minimized cost. It does not require an
input bulk capacitor or feedback circuitry. To implement
good power factor and low total harmonic distortion,
constant on-time control is utilized with an external
capacitor connected to the COMI pin.
Precise constant-current control regulates accurate
output current versus changes in input voltage and
output voltage. The operating frequency is proportionally
changed by the output voltage to guarantee
Discontinuous Conduction Mode (DCM) operation with
higher efficiency and simpler design. The FL7730MY
provides protections such as open-LED, short-LED, and
over-temperature protections. Current-limit level is
automatically reduced to minimize output current and
protect external components in a short-LED condition.
The FL7730MY frequency-hopping function in the
oscillator improves EMI performance. The FL7730MY
controller is available in an 8-pin SOP package.
Applications
LED Lighting System
Ordering Information
Part Number
FL7730MY
Operating Temperature Range
-40°C to +125°C
Package
8-Lead, Small Outline Package
(SOP-8)
Packing Method
Tape & Reel
© 2011 Fairchild Semiconductor Corporation
FL7730MY • Rev. 1.0.3
www.fairchildsemi.com


Fairchild Semiconductor Electronic Components Datasheet

FL7730MY Datasheet

Single-Stage Primary-Side-Regulation PWM Controller

No Preview Available !

Application Diagram
TRIAC Dimmer
BRIDGE DIODE
Line
input
FUSE
FL7730
4 VDD GATE 2
5 DIM
GND 8
7 COMI
VS 6
3 GND
CS 1
TRANS
Figure 1. Typical Application
Internal Block Diagram
VDD 4
GND 3
DIM 5
GND 8
VOVP
Internal
Bias
VDD Good
+
-
OSC
Shutdown
SQ
R
Gate
Driver
OCP Level
Controller
VS
2 GATE
TSD
SQ
VDD good
R
DCM
BCM
TRIAC
Dimming
Function
Linear Frequency
Controller
Freq.
VS
VOCP
Sawtooth
Generator
LEB
1 CS
7 COMI
Error
Amp.
Line
Compensator
tDIS VREF
Detector
TrueCurrent™
Calculation
6 VS
Sample & Hold
Figure 2. Functional Block Diagram
© 2011 Fairchild Semiconductor Corporation
FL7730MY • Rev. 1.0.3
2
www.fairchildsemi.com



Part Number FL7730MY
Description Single-Stage Primary-Side-Regulation PWM Controller
Maker Fairchild Semiconductor
Total Page 13 Pages
PDF Download

FL7730MY Datasheet PDF





Similar Datasheet

1 FL7730MY Single-Stage Primary-Side-Regulation PWM Controller
Fairchild Semiconductor





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy