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AL5822 Datasheet

ADAPTIVE 100Hz/120Hz LED CURRENT RIPPLE SUPPRESSOR

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AL5822
ADAPTIVE 100Hz/120Hz LED CURRENT RIPPLE SUPPRESSOR
Description
Pin Assignments
The AL5822 is a 100Hz/120Hz LED current ripple suppressor for LED
lighting applications. Combined with a pre-stage APFC LED driver, the
AL5822 circuitry can efficiently suppress the low frequency
(100Hz/120Hz) LED current ripple from the APFC output, thus eliminate
the low frequency flickering for various LED lamps.
The AL5822 adopts high efficiency driving mechanism. It can
automatically adapt to different LED chains’ voltage and current, to
eliminate the LED current ripple, meanwhile minimize the power
consumption on the Power MOSFET.
The AL5822 has built-in protections, such as Over-Temperature-
Protection (OTP), Over-Current-Protection (OCP) and LED Short-Circuit
Protection (SCP).
The AL5822 is available in the SOT26 package.
VIN 1
GND 2
VC 3
Top View
SOT26
6 VLMT
5 VS
4 VG
Features
High Efficiency
Support Various Kinds of APFC Pre-Stage Circuit
Simplified External Bill of Materials (BOM)
No Need for Magnetic Components
Wide Output Voltage and Current Range
Tuneable LED Current Ripple Ratio
Flickering Free
Built-In LED Short-Circuit Protection (SCP)
Built-In Over-Current Protection (OCP)
Built-In Over-Temperature Protection (OTP)
SOT26 Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
General LED Lamps
LED Power Modules
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
APFC LED Driver
R1
C1
C2
LEDS
VIN 1
6 VLMT
GND 2 AL5822 5 VS
VC 3
4 VG
C3 RLMT2
RLMT1
Rs
Q1
AL5822
Document number: DS41708 Rev. 1 - 2
1 of 10
www.diodes.com
January 2019
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL5822 Datasheet

ADAPTIVE 100Hz/120Hz LED CURRENT RIPPLE SUPPRESSOR

No Preview Available !

Pin Descriptions
Pin Number
1
2
3
4
5
6
Pin Name
VIN
GND
VC
VG
VS
VLMT
Function
Supply for the IC
Ground
Compensation for the Control Loop
Gate Driver for the External MOSFET
Current Sensing
Drain Voltage Limitation for the External MOSFET
Functional Block Diagram
VIN
1
UVLO
&BIAS
VIN CLAMP
3
VC
Discharge
Variable
REF
2
GND
Short
Detection
EA
AL5822
6 VLMT
4
VG
5
VS
AL5822
Document number: DS41708 Rev. 1 - 2
2 of 10
www.diodes.com
January 2019
© Diodes Incorporated


Part Number AL5822
Description ADAPTIVE 100Hz/120Hz LED CURRENT RIPPLE SUPPRESSOR
Maker Diodes
Total Page 10 Pages
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