Power Controller. iW3609 Datasheet

iW3609 Controller. Datasheet pdf. Equivalent

iW3609 Datasheet
Recommendation iW3609 Datasheet
Part iW3609
Description AC/DC Digital Power Controller
Feature iW3609; iW3609 Product Brief AC/DC Digital Power Controller for Single-Stage High Power Factor Dimmable LED .
Manufacture iWatt
Datasheet
Download iW3609 Datasheet




iWatt iW3609
iW3609 Product Brief
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
1.0 Features
Isolated/non-isolated offline120VAC/230VAC LED driver
up to 15W output power
Wide line frequency range (from 45Hz to 66Hz)
Meets IEC61000-3-2 Current Harmonic requirement
Total harmonic distortion < 20% with PF > 0.92
Wide dimmer compatibility
xx Leading-edge dimmer
xx Trailing-edge dimmer
Selectable dimming range of 1% to 100% or 10% to
100%
Resonant control to achieve high efficiency (typical > 82%
without dimmer)
Over-temperature LED current foldback
Small solution size
xx Single-stage topology reduces part counts
xx 90kHz maximum switching frequency enables the
use of a small transformer
Primary-side sensing eliminates the need for opto-
isolator feedback
Tight LED current regulation (± 5%)
Fast start-up (< 0.5s without dimmer)
Compatible with NEMA SSL6 dimming curve standard
Multiple protection features that include:
xx LED open-circuit and short-circuit protection
xx Over-current protection
xx Over-temperature protection
xx Current sense resistor short-circuit protection
xx AC line over-voltage protection
● Optional proprietary input current shaping
● rcu
2.0 Description
The iW3609 is a single-stage, high-performance
AC/DC offline power supply controller for
dimmable LED luminaires. It applies advanced
digital control technology to detect the dimmer
type, which provides dynamic impedance to
interface with the dimmer and control the LED
brightness at the same time.
With advanced dimmer detection technology, the iW3609
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 iW3609’s cycle-by-cycle waveform
analysis technology allows for fast dimmer setting response.
When no dimmer is on the line, the iW3609 optimizes the
power factor and minimizes the current harmonic distortion
to the AC line. Furthermore, in no dimmer condition, output
current is regulated at nominal output current value over a
wide input voltage range.
The iW3609 operates the main power converter that delivers
current to the LED load in quasi-resonant mode to provide
high power efficiency and minimize electro-magnetic
interference (EMI). The commonly utilized converter
topologies for iW3609 are buck-boost and flyback. It uses
iWatt’s patented PrimAccurateTM 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 iW3609 minimizes the external components count by
simplifying the EMI filter with iWatt’s EZ-EMI® technology.
The intelligent dimmer detection technology minimizes the
bleeding power loss. Additionally, the digital control loop of
the iW3609 maintains stable overall operating conditions
without the need for loop compensation components.
Current shaping option is available to balance the power
loss of the bleeder circuit.
3.0 Applications
Dimmable LED retrofit lamps up to 15W
Dimmable LED luminaires up to 15W
Rev. 0.3
iW3609
Page 1



iWatt iW3609
iW3609 Product Brief
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
AC Input
-
Output
+
iW3609
1 BLEEDER
2 VIN
VCC 8
VSENSE 4
3 IIN
OUTPUT 6
7 GND
ISENSE 5
Figure 3.1: iW3609 Simplified Application Circuit
4.0 Pinout Description
iW3609
1 BLEEDER
VCC 8
2 VIN
GND 7
3 IIN
OUTPUT 6
4 VSENSE
ISENSE 5
Pin #
1
2
3
4
5
6
7
8
Name
BLEEDER
VIN
IIN
VSENSE
ISENSE
OUTPUT
GND
VCC
Type Pin Description
Output Gate drive for Bleeder switch
Analog Input Rectified AC line voltage sense
Analog Input Rectified AC line current sense
Analog Input Auxiliary winding voltage sense
Analog Input Primary side current sense
Output Base drive for main BJT switch
Ground Ground
Power Power supply for control logic
Rev. 0.3
iW3609
Page 2



iWatt iW3609
iW3609 Product Brief
AC/DC Digital Power Controller for
Single-Stage 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 iW3609 datasheet for more information.
Parameter
DC supply voltage range (pin 8)
OUTPUT (pin 6)
Symbol
VCC
Value
-0.3 to 18
-0.3 to 4.0
Units
V
V
BLEEDER output (pin 1)
VSENSE input (pin 4, I ≤ 10mA)
VIN input (pin 2)
ISENSE input (pin 5)
IIN input (pin 3)
Power dissipation at TA ≤ 25°C
Maximum junction temperature
Storage temperature
Thermal Resistance Junction-to-Ambient [Still Air]
ESD rating per JEDEC JESD22-A114
TJ MAX
TSTG
θJA (Note 1)
-0.3 to VCC
-0.7 to 4.0
-0.3 to 18
-0.3 to 4.0
-0.7 to 4.0
TBD
150
-65 to 150
160
2,000
V
V
V
V
V
mW
°C
°C
°C/W
V
Latch-up test per JEDEC 78
±100
mA
Notes:
Note 1. θJA (Junction-to-Ambient [Still Air] ) is measured in a one-cubic-foot natural convection chamber.
Rev. 0.3
iW3609
Page 3







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