iW3689
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
1 Description
The iW3689 is a single-stage, high-performance AC/DC off-line power supply controller for dimmable LED luminaires. It
applies advanced digital control technology to detect the dimmer type, enabling it to provide dynamic impedance to interface
with the dimmer and to control the LED brightness at the same time.
With advanced dimmer detection technology, the iW3689 can operate with most wall dimmers including leading-edge
dimmers (R-type or R-L type), trailing-edge dimmers (R-C type), and smart dimmers. In addition, the iW3689’s cycle-
by-cycle waveform analysis technology allows for fast dimmer transient response.
In no-dimmer mode, the iW3689 operates the main power converter that delivers current to the LED load in quasi-
resonant mode to provide high power efficiency and low electro-magnetic interference (EMI). When there is no
dimmer on the line, the iW3689 optimizes the power factor and minimizes the current harmonic distortion to the AC
line. The commonly utilized converter topologies for iW3689 are buck-boost and flyback.
The iW3689 uses patented
PrimAccurate
™
primary-side sensing technology to achieve excellent LED current
regulation under different AC line and LED load voltages, without using a secondary-side feedback circuit and thus
eliminating the need for an opto-coupler.
The iW3689 minimizes the external components count by simplifying the EMI filter with Dialog’s
EZ-EMI
®
technology,
and by integrating current sink, switching, and V
CC
charging circuit. Additionally, the iW3689 does not require an
auxiliary winding, which eliminates the need for a custom inductor. The digital control loop of the iW3689 maintains
stability over all operating conditions without the need for loop compensation components.
The iW3689 maintains high performance wide-range dimming and achieves excellent dimmer compatibility with a
simple application circuit.
2 Features
●
Isolated/non-isolated off-line 120V
AC
/230V
AC
LED
driver up to 25W (Note 1)
●
Wide line frequency range (from 45Hz to 66Hz)
● Meets IEC61000-3-2 current harmonic requirement
●
Total harmonic distortion < 20% with PF > 0.92
●
Excellent dimmer compatibility
x
x
x
Leading-edge dimmer
Trailing-edge dimmer
Digital smart dimmer
● Resonant control to achieve high efficiency (typical
>85% without dimmer)
●
Excellent AC line distortion immunity ensures quality of
product under real-life circumstances
●
Over-temperature LED current foldback and
shutdown
●
Tight LED current regulation (±5%)
●
Fast start-up (< 0.5s without dimmer)
● Multiple protection features that include:
x
x
x
LED open-circuit and short-circuit protection
Current sensing resistor open circuit and short-
circuit protection
Over-current protection
●
Wide dimming range of 1% to 100%
●
Intelligent digital control integrates current sink and
V
CC
maintenance function into power switching circuit
●
Advanced IC power management and voltage sensing
enables the use of off-the-shelf inductor
3 Applications
● Dimmable LED retrofit lamps up to 25W (Note 1)
●
Dimmable LED luminaires up to 25W (Note 1)
Product Summary
www.dialog-semiconductor.com
Rev. 1.0
1 of 6
18-April-2016
© 2016 Dialog Semiconductor
iW3689
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
N
-
+
+
L
iW3689
1
2
3
V
IN
CFG
V
CC
GND
V
CB
V
D
V
S
I
SENSE
8
7
6
5
Note 1 : For output power above 12W designs, care should be taken to verify the thermal and reliability constrains
on the IC. IC temperature below 120
°C
is recommended for proper IC operation.
Product Summary
www.dialog-semiconductor.com
+
4
Figure 3.1 : iW3689 Typical Application Circuit
Rev. 1.0
2 of 6
18-April-2016
© 2016 Dialog Semiconductor
iW3689
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
4 Pinout Description
iW3689
1
2
3
4
V
IN
CFG
V
CC
GND
V
CB
8
V
D
V
S
I
SENSE
7
6
5
Figure 4.1 : 8-Lead SOIC-8 Package
Pin Number
1
2
3
4
5
6
7
8
Pin Name
V
IN
CFG
V
CC
GND
I
SENSE
V
S
V
D
V
CB
Type
Analog Input
Analog Input
Power
Ground
Analog Input
Analog Input
Analog Input
Analog Input
Pin Description
Rectified AC line voltage input.
OTP threshold and dimmer mode configuration on start-up.
Power supply for control logic.
Ground.
Current sense.
Source voltage of MOSFET.
Drain voltage of MOSFET.
Input capacitor voltage after EMI filter.
Product Summary
www.dialog-semiconductor.com
Rev. 1.0
3 of 6
18-April-2016
© 2016 Dialog Semiconductor
iW3689
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
5 Absolute Maximum Ratings
Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded.
Parameter
DC supply voltage range (pin 3)
V
IN
input (pin 1)
CFG input (pin 2)
I
SENSE
input (pin 5)
V
S
input (pin 6)
V
D
input voltage (pin 7)
V
CB
input voltage (pin 8)
V
D
input current (pin 7)
V
CB
input current (pin 8)
Maximum junction temperature
Operating junction temperature
Storage temperature
Thermal resistance junction-to-PCB [gnd lead]
ESD rating per JEDEC JESD22-A114
Latch-up test per JESD78A
T
JMAX
T
JOPT
T
STG
ψ
JB
Symbol
V
CC
Value
-0.3 to 6
-0.3 to 6
-0.3 to 6
-0.3 to 6
-0.3 to 24
-0.3 to 6
-0.3 to 6
750
750
150
-40 to 150
-65 to 150
75
±2,000
±100
Unit
V
V
V
V
V
V
V
μA
μA
°C
°C
°C
°C/W
V
mA
Product Summary
www.dialog-semiconductor.com
Rev. 1.0
4 of 6
18-April-2016
© 2016 Dialog Semiconductor
iW3689
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
6 Physical Dimensions
8-Lead Small Outline (SOIC) Package
D
Symbol
Inches
MIN
0.053
0.0040
0.014
0.007
0.189
0.150
0.228
0.016
0°
MAX
0.069
0.010
0.019
0.010
0.197
0.157
0.244
0.049
8°
Millimeters
MIN
1.35
0.10
0.35
0.19
4.80
3.80
5.80
0.40
MAX
1.75
0.25
0.49
0.25
5.00
4.00
6.20
1.25
8
5
4
E
1
H
A
A1
B
C
D
E
e
A
H
L
α
α
C
SIDE VIEWS
L
e
TOP VIEW
A1
0.050 BSC
1.27 BSC
COPLANARITY
0.10 (0.004)
B
SEATING
PLANE
Compliant to JEDEC Standard MS12F
Controlling dimensions are in inches; millimeter dimensions are for reference only
This product is RoHS compliant and Halide free.
Soldering Temperature Resistance:
[a] Package is IPC/JEDEC Std 020D moisture sensitivity level 1
[b] Package exceeds JEDEC Std No. 22-A111 for solder immersion resistance; package can withstand
10 s immersion < 260˚C
Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall
not exceed 0.15 mm per end. Dimension E1 does not include interlead flash or protrusion. Interlead flash or
protrusion shall not exceed 0.25 mm per side.
The package top may be smaller than the package bottom. Dimensions D and E1 are determined at the
outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but
including any mismatch between the top and bottom of the plastic body.
7 Ordering Information
Part Number
iW3689-00
iW3689-01
iW3689-11
iW3689-31
Options
120V
AC
Input
230V
AC
Input, Optimized for Higher Power Applications
230V
AC
Input, Optimized for Lower Power Applications
230V
AC
Input, Optimized for Compact Size Applications
Package
SOIC-8
SOIC-8
SOIC-8
SOIC-8
Description
Tape & Reel
2
Tape & Reel
2
Tape & Reel
2
Tape & Reel
2
Note 2: Tape and reel packing quantity is 2,500/reel. Minimum ordering quantity is 2,500.
Product Summary
www.dialog-semiconductor.com
Rev. 1.0
5 of 6
18-April-2016
© 2016 Dialog Semiconductor
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