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AL1771 Datasheet

PFC CONTROLLER + SINGLE/DUAL DIMMABLE LINEAR LED DRIVER

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AL1771/1772
PFC CONTROLLER + SINGLE/DUAL DIMMABLE LINEAR LED DRIVER
Description
The AL1771/1772 is a high integration chip with an Offline High
Power Factor Correction (PFC) controller and a single/dual-channel
Linear LED driver in one package. AL1771/1772 implements an
optimized 2-stage topology for a wide power range of Connected
Lighting applications. It is targeted for 1-Channel Dimmable and 2-
Channel Tunable White and various Connected Lighting applications.
Based on Primary Side Regulation (PSR) implementation, the PFC
controller does not require Opto-coupler and any secondary feedback
circuit to save overall BOM cost and it operates at Quasi-Resonant
(QR) mode where MOSFET is turned on at the valley of the drain
voltage, which minimizes switching loss and results in high efficiency.
The key merits of the Single/Dual Dimmable Linear LED driver
attribute to excellent dimming performance, low standby power, ease
of system implementation, and great product scalability. It supports E-
flicker free High Frequency PWM dimming with Deep Dimming
Capability: Support 40kHz down to 4%, 10kHz down to 1.0%, 4kHz
down to 0.4%, or 1kHz down to 0.1% with good dimming linearity.
When no PWM signal is detected by AL1771/1772, the LED driver
Section will automatically enter the low-power mode for power saving
purpose to be in compliance with Energy Star standby power
requirement for Connected Lighting. Integrates Adaptive Thermal
Management (ATM) scheme to minimize non-productive power
dissipation.
The AL1771/1772 has protection features to ensure robust and safety
operation of the Connected Lighting systems. The AL1771/1772 can
support applications with LED current (Up 1500mA) and is available
in low thermal resistance package TSSOP-16EP (Type DX).
Features
High PFC Controller and Dimmable Linear LED Driver in One
Package
Valley Detection to Achieve Low Switching Loss and High
Efficiency
Input Voltage Range for LED Driver (DVCC): 6.5V to 30V
Each Channel Independent PWM Dimming Control
Adjustable Reference Current by External Reference Resistors
LED Current Accuracy ≤ ±4%
Maximum LED Current 1500mA for AL1771 and 750mA Per
Channel to AL1772
Adaptive Thermal Management (ATM) Scheme to Minimize
Power Dissipation
Low Standby Power Mode with Automatically Enter and Exit
High Frequency E-Flicker Free PWM Dimming with Deep
Dimming Capability
Protections:
PFC Controller:
Under Voltage Lockout (UVLO)
Over Voltage Protection (OVP)
Over Current Protection (OCP)
Output Short Protection (OSP)
Over-Temperature Protection (OTP): Thermal Shutdown
and Auto Thermal Recovery
Dimmable Linear LED Driver:
Under Voltage Lockout (UVLO)
LED String Open/Short Protection
Over-temperature Protection (OTP): Thermal Shutdown and
Auto Thermal Recovery
Fault Reports: UVLO, OTP, LED Open/Short
Low System BOM
Ambient Temperature Operating Range -40°C to +125°C
TSSOP-16EP (Type DX): Available in “Green” Molding Compound
(No Br, Sb)
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green” Device (Note 3)
Pin Assignments
(Top View)
TP
REF1
DVCC
NC
PWM1
DGND
NC
LED1
1
2
3
4
5
6
7
8
16 FAULTB
15 LEDPG
14 FB
13 COMP
EP
12 AVCC
11 GD
10 AGND
9 CS
TSSOP-16EP (Type DX) (AL1771)
(Top View)
REF2
REF1
DVCC
PWM2
PWM1
DGND
LED2
LED1
1
2
3
4
5
6
7
8
16 FAULTB
15 LEDPG
14 FB
13 COMP
EP
12 AVCC
11 GD
10 AGND
9 CS
TSSOP-16EP (Type DX) (AL1772)
Applications
1-Channel Dimmable Connected Light Bulbs
2-Channel Tunable White Connected Bulbs
Smart Connected LED Tubes, Panel Lights, Troffers, and Ceiling
Lights
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.
AL1771/1772
Document number: DS41314 Rev. 1 - 2
1 of 24
www.diodes.com
August 2018
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AL1771 Datasheet

PFC CONTROLLER + SINGLE/DUAL DIMMABLE LINEAR LED DRIVER

No Preview Available !

Typical Applications Circuit
85~265Vac
R2
COMP
C4 C7
C1
AVCC
DVCC
R7
D3
C3
AL1771/1772
VLED
D1 C2
VMCU3(3V)
D2 C5
AL1771 GD
CS
Q1
RCS
R5
R6
FB
LEDPG
RLEDPG
LED1
REF1
RFAULTB
FAULTB
PWM1
VMCU3(3V)
Wireless/Color
Management
MCU
AGND
DGND
EP
Figure 1. 1-Channel Dimmable White
RSET1
AL1771/1772
Document number: DS41314 Rev. 1 - 2
2 of 24
www.diodes.com
August 2018
© Diodes Incorporated


Part Number AL1771
Description PFC CONTROLLER + SINGLE/DUAL DIMMABLE LINEAR LED DRIVER
Maker Diodes
Total Page 24 Pages
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