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AL1673 Datasheet

UNIVERSAL FLYBACK AND BUCK-BOOST SINGLE STAGE DIMMABLE LED DRIVER

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AL1673
UNIVERSAL FLYBACK AND BUCK-BOOST
SINGLE STAGE DIMMABLE LED DRIVER
Description
Pin Assignments
The AL1673 is a high performance single stage Flyback/Buck-Boost
converter, targeting dimmable LED lighting application. It is operating
at BCM mode which results in good EMI and efficiency.
The AL1673 can support multiple dimming modes. When a 0.3~2.4V
DC signal is applied on APWM pin, the device will operate in analog
dimming mode. When a digital signal is applied on APWM pin, the
device works at PWM dimming mode.
The AL1673 features low start-up current and low operation current. It
integrates multiple protections including over voltage, short circuit,
over current and over temperature protection. It also integrates
600V/2A high voltage MOSFET.
(Top View)
CS 1
GND 2
DRAIN 3
DRAIN 4
8 COMP
7 APWM
EP
6 FB
5 VCC
SO-8EP
The AL1673 is available in SO-8EP package.
Applications
Features
Valley Switching for Low Switching Loss
Low Start-Up Current
High PF and Low THD
High Efficiency
Tight LED Current Variation Range
Tight Output Open Voltage Variation Range
Integrates 600V/2A MOSFET
Support Both PWM Dimming and Analog Dimming
PWM Dimming Range:3% to 100% at 1kHz PWM
Frequency
Analog Dimming and PWM-to-DC Dimming Range:18%
to 100%;
Internal Protections
Under Voltage Lock Out (UVLO)
Output Over Voltage Protection (OVP)
Output Short Protection (OSP)
Over Current Protection (OCP)
Thermal Fold-back Protection (TFP)
Over Temperature Protection (OTP)
Low System Cost
Package: SO-8EP
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
General LED Lighting Driver with Dimming Function
General Purpose Constant Current Source
Smart LED Lighting
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html 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.
AL1673
Document number: DS39540 Rev. 1 - 2
1 of 15
www.diodes.com
April 2017
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL1673 Datasheet

UNIVERSAL FLYBACK AND BUCK-BOOST SINGLE STAGE DIMMABLE LED DRIVER

No Preview Available !

AL1673
Typical Applications Circuit
L1
AC
Input
F1
VR1
C1
DB1
RTH D1
C2
CVCC
PWM/DC
Signal
RCOMP
CCOMP
5
7 VCC FB
APWM
DRAIN
8
COMP
DRAIN
GND CS
6
3
4
21
RCS
R4
R5
R6
R10
D3
T1
C5
T1.aux
D2
R3
C4 OUT
CY
AC
Input
F1
VR1
AL1673 Flyback Application Circuit
L1
C1
DB1
RTH D1
C2
CVCC
PWM/DC
Signal
RCOMP
CCOMP
5
7 VCC FB
APWM
8 DRAIN
COMP
DRAIN
GND CS
6
3
4
21
RCS
R4
R5
R6
AL1673 Buck-Boost Application Circuit
Pin Descriptions
R3 +C4 OUT
L2
D2
Pin Number
1
2
3,4
5
6
7
8
9
Pin Name
CS
GND
DRAIN
VCC
FB
APWM
COMP
Exposed Pad
Function
Current sense pin, connect this pin to the source of the primary
switch
Ground
Drain of internal MOS
Supply voltage of gate driver and control circuits of the IC
The feedback voltage sensing from the auxiliary winding
Analog dimming input pin or PWM signal input pin in PWM
dimming mode
Loop compensation pin
Drain of internal MOS
AL1673
Document number: DS39540 Rev. 1 - 2
2 of 15
www.diodes.com
April 2017
© Diodes Incorporated


Part Number AL1673
Description UNIVERSAL FLYBACK AND BUCK-BOOST SINGLE STAGE DIMMABLE LED DRIVER
Maker Diodes
Total Page 15 Pages
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