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AL1665 Datasheet

HIGH PERFORMANCE DIMMABLE LED CONTROLLER

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AL1665
HIGH PERFORMANCE DIMMABLE LED CONTROLLER
Description
The AL1665 is a high performance single stage flyback and buck-
boost controller, targeting dimmable LED lighting application. It is a
Primary Side Regulation (PSR) controller which can provide accurate
Constant Current (CC) regulation without opto-coupler and secondary
control circuitry. It can be operated at BCM mode which results in low
EMI and high efficiency, and keeps high Power Factor (PF) and low
Total Harmonic Distortion (THD) under universal input voltage.
The AL1665 can support analog/PWM dimming modes. When a
50mV to 2.5V DC signal is applied on ADIM pin, the device will be
operated in analog dimming mode. The analog dimming range is 5%
to 100%. When a PWM signal is applied to NTC/PWM pin, the device
will be operated at PWM dimming mode. The PWM dimming range is
0.5% to 100% (1k PWM dimming frequency).
Pin Assignments
(Top View)
ADIM 1
NTC/PWM 2
COMP 3
CS 4
8 FB
7 VCC
6 OUT
5 GND
SO-8 (Standard)
The AL1665 features low operation current. It integrates multiple
protections including over voltage, short circuit, over current and over
temperature.
The AL1665 is available in SO-8 (Standard) package.
Applications
General LED Lighting Driver with Dimming Function
General Purpose Constant Current Source
LED Backlighting Driver
Smart LED Lighting
Features
Primary Side Regulation without Opto-Coupler
Valley Switching for Low Switching Loss
Low Start-Up Current
Support Analog and PWM Dimming
Analog Dimming Range: 5% to 100%
PWM Dimming Range: 0.5% to 100% (1k PWM Frequency)
Internal Protections
Under Voltage Lock Out (UVLO)
Output Over Voltage Protection (OVP)
Output Short Protection (OSP)
Over Current Protection (OCP)
CS Short Protection
Winding Short Circuit Protection
Secondary Diode Short Protection
Shorted Current Sense Protection
User Programmable NTC Based Thermal Foldback
Internal Thermal Fold-Back Protection (TFP)
Over Temperature Protection (OTP)
Low System Cost
High PF>0.9 and Low THD<20%
High Efficiency
Tight LED Current Variation Range
LED Current Line Regulation: ±2%
LED Current Load Regulation: ±2% Full Load to Half Load
Tight Output Open Voltage Variation Range
Package: SO-8 (Standard)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
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.
AL1665
Document number: DS41772 Rev. 1 - 2
1 of 16
www.diodes.com
March 2019
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL1665 Datasheet

HIGH PERFORMANCE DIMMABLE LED CONTROLLER

No Preview Available !

AL1665
Typical Applications Circuit
AC
Input
F1
VR1
DB1
L1
C1 C2 RTH
T1
R10 C5
D2
Aux R4 D1
CVCC
R5
VCC ADIM
D4
R6
FB AL1665OUT
COMP
R9
RCOMP
NTC/PWM GND CS
U1
CCOMP
Q1
RCS
C7 R14
D3
R11
+C6
OUT
AC
Input
F1
VR1
DB1
Flyback Application Circuit
L1
C1 C2 RTH
T1
R11
Aux R4 D1
CVCC
R5
VCC ADIM
D4
FB OUT
R6
AL1665
COMP
R9
RCOMP
NTC/PWM GND CS
CCOMP
D3
Q1
RCS
C6 OUT
Buck-Boost Application Circuit
Pin Descriptions
Pin Number
1
2
3
4
5
6
7
8
Pin Name
ADIM
NTC/PWM
COMP
CS
GND
OUT
VCC
FB
Analog Dimming Input Pin
Function
NTC Input Pin for Thermal Foldback/PWM Dimming Input Pin
Loop Compensation Pin
Current Sense Pin, Connect This Pin to the Source of the Primary Switch
Ground
Gate Driver Output
Supply Voltage of Gate Driver and Control Circuits of the IC
The Feedback Voltage Sensing from the Auxiliary Winding
AL1665
Document number: DS41772 Rev. 1 - 2
2 of 16
www.diodes.com
March 2019
© Diodes Incorporated


Part Number AL1665
Description HIGH PERFORMANCE DIMMABLE LED CONTROLLER
Maker Diodes
Total Page 16 Pages
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