iW3616 Product Brief
AC/DC Digital Power Controller for
High Power Factor Dimmable LED Drivers
1.0 Features
● Isolated/non-isolated offline 120V
AC
/230V
AC
LED driver
up to 12W output power
● Wide line frequency ranges (from 45Hz to 66Hz)
● Meets IEC61000-3-2 requirement
● Total harmonic distortion < 15% with PF > 0.95
● Wide dimmer compatibility
x
x
x
x
Leading-edge dimmer
Trailing-edge dimmer
Digital dimmer
Occupancy sensors and timers
2.0 Description
The iW3616 is a two-stage, high-performance AC/DC offline
power supply controller for dimmable LED luminaires. It
applies advanced digital control technology to detect the
dimmer type and phase, which provides dynamic impedance
to interface the dimmer and control the LED brightness
at the same time. The iW3616 uses iWatt’s unique digital
Flickerless
TM
technology to eliminate visible flicker in the
entire dimming range and minimize low frequency output
ripple current.
With advanced dimmer detection technology, the iW3616
can operate with most wall dimmers including leading-edge
dimmers (R-type or R-L type) and trailing-edge dimmers (R-C
type). In addition, the iW3616’s cycle-by-cycle waveform
analysis technology allows fast dimmer setting response.
When no dimmer is on the line, the iW3616 optimizes the
power factor and minimizes the current harmonic distortion
to the AC line.
The iW3616 operates the main power converter that delivers
constant current to the LED load in quasi-resonant mode to
provide high power efficiency and minimize electro-magnetic
interference (EMI). It uses iWatt’s patented PrimAccurate
TM
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 eliminating the need for an opto-coupler.
The iW3616 minimizes the external components count by
simplifying the EMI filter with iWatt’s EZ-EMI
®
technology. The
intelligent dimmer detection technology eliminates the need
for a high-power bleeder. Additionally, the digital control loop
of the iW3616 maintains stable overall operating conditions
without the need for loop compensation components.
● Under 20% output ripple current
● Wide dimming range from 1% to 100%
● Flickerless
TM
LED dimming
● Resonant control to achieve high efficiency
(typical > 85% without dimmer)
● Over-temperature LED current foldback
● Small solution size
x
x
x
Two-stage topology enables small-size input and
output filter capacitors
200kHz maximum switching frequency enables
small transformer
Intelligent dimmer interface eliminates dedicated
high-power bleeder
● Primary-side sensing eliminates the need for
opto-isolator feedback
● Tight LED current regulation (± 5%)
● Fast start-up (< 0.5s without dimmer)
● Supports hot-plug LED module (Zhaga)
● Compatible with NEMA SSL6 dimming curve standard
● Supports wide LED output voltage range
● Multiple protection features:
x
x
x
x
LED open-circuit and short-circuit protection
Over-current and over-temperature protection
Current sense resistor short-circuit protection
AC line over-voltage/-frequency protection
3.0 Applications
● Dimmable LED retrofit lamps up to 12W
● Dimmable LED ballast and luminaires up to 12W
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iW3616 Product Brief
AC/DC Digital Power Controller for
High Power Factor Dimmable LED Drivers
Booster
Converter
AC Input
From Dimmer
Flyback
Converter
V
OUT
4
B
DRV
1
BV
SENSE
14
V
CB
6
ASU
7
V
CC
F
DRV
10
RTN
3
BI
SENSE
2
V
IN
iW3616
PGND
8
FI
SENSE
11
FV
SENSE
12
AGND
9
CFG
5
V
T
13
NTC
Figure 3.1 :
iW3616 Simplified Schematic
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iW3616 Product Brief
AC/DC Digital Power Controller for
High Power Factor Dimmable LED Drivers
4.0 Pinout Description
iW3616
1
BV
SENSE
2
V
IN
3
BI
SENSE
4
B
DRV
5
CFG
6
ASU
7
VCC
VCB
14
V
T 13
FV
SENSE 12
FI
SENSE 11
F
DRV 10
AGND
9
PGND
8
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
BV
SENSE
V
IN
BI
SENSE
B
DRV
CFG
ASU
V
CC
PGND
AGND
F
DRV
FI
SENSE
FV
SENSE
V
T
V
CB
Type
Analog Input
Analog Input
Analog Input
Output
Analog In/Out
Output
Power
Ground
Ground
Output
Analog Input
Analog Input
Analog Input
Analog Input
Pin Description
Boost inductor voltage feedback input
Rectified AC line voltage input
Boost current sense input
Base drive output for boost BJT
Driver parameter configuration pin and auxiliary driver
Active start-up and bleeder control
Power supply for control logic and voltage sense for power-on reset circuit
Power ground
Signal ground. It should be connected to the power ground on PCB.
Gate drive output for flyback MOSFET
Flyback current sense (used for cycle-by-cycle peak current control and
limit)
Flyback voltage sense (used for primary-side regulation and ZVS)
External power limit shutdown control and external over-temperature power
derating
Boost output voltage feedback input
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iW3616 Product Brief
AC/DC Digital Power Controller for
High Power Factor Dimmable LED Drivers
5.0 Absolute Maximum Ratings
Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded. For
maximum safe operating conditions, refer to iW3616 Datasheet for more information.
Parameter
DC supply voltage range (pin 7, I
CC
= 20mA max)
DC supply current at V
CC
pin
F
DRV
output (pin 10)
B
DRV
output (pin 4)
CFG input (pin 5)
CFG output (pin 5)
FV
SENSE
input (pin 12, I ≤ 10mA)
BV
SENSE
input (pin 1, I ≤ 3mA)
V
IN
input (pin 2)
V
CB
input (pin 14)
FI
SENSE
input (pin 11)
BI
SENSE
input (pin 3)
ASU output (pin 6)
V
T
input (pin 13)
Power dissipation at T
A
≤ 25°C
Maximum junction temperature
Storage temperature
Lead temperature during IR reflow for ≤ 15 seconds
Thermal Resistance Junction-to-PCB Board Surface Temperature
ESD rating per JEDEC JESD22-A114
Latch-up test per JEDEC 78
Notes:
Symbol
V
CC
I
CC
Value
-0.3 to 18
20
-0.3 to 18
-0.3 to 4.0
-0.3 to 4.0
-0.3 to 18
-0.7 to 4.0
-0.7 to 4.0
-0.3 to 18
-0.3 to 18
-0.3 to 4.0
-0.3 to 4.0
-0.3 to 18
-0.3 to 4.0
900
Units
V
mA
V
V
V
V
V
V
V
V
V
V
V
V
mW
°C
°C
°C
°C/W
V
mA
T
J MAX
T
STG
T
LEAD
150
-65 to 150
260
45
2,000
±100
ψ
JB
(Note 1)
Note 1.
ψ
JB
[Psi Junction to Board] provides an estimation of the die junction temperature relative to the PCB surface
temperature. This data is measured at the ground pin (pin 8 and pin 9) without using any thermal adhesives.
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iW3616 Product Brief
AC/DC Digital Power Controller for
High Power Factor Dimmable LED Drivers
6.0 Physical Dimensions
14-Lead SOIC Package
D
Symbol
Inches
MIN
0.053
0.004
0.013
0.007
0.337
0.150
0.228
0.086
0.118
0.016
0°
MAX
0.069
0.010
0.020
0.010
0.344
0.157
0.244
0.094
0.126
0.050
8°
Millimeters
MIN
1.35
0.10
0.33
0.19
8.55
3.80
5.80
2.18
3.00
0.40
0°
MAX
1.75
0.25
0.51
0.25
8.75
4.00
6.20
2.39
3.20
1.27
8°
14
8
7
E
1
H
A
A1
B
C
D
E
e
H
α
C
0°
L
N
M
L
α
e
TOP VIEW
A1
0.050 BSC
1.27 BSC
A
B
SEATING
PLANE
COPLANARITY
0.10 (0.004)
SIDE VIEWS
Figure 6.1 :
Physical dimensions, 14-lead SOIC package
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 < 270˚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 E 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 E are determined at the
outermost extremes of the plastic bocy 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.
7.0 Ordering Information
Part Number
iW3616-00
iW3616-01
Options
120V
AC
Input
230V
AC
Input
Package
SOIC-14
SOIC-14
Description
Tape & Reel
1
Tape & Reel
1
Note 1: Tape & Reel packing quantity is 2,500/reel.
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