Power Controller. iW3605 Datasheet

iW3605 Controller. Datasheet pdf. Equivalent

iW3605 Datasheet
Recommendation iW3605 Datasheet
Part iW3605
Description AC/DC Digital Power Controller
Feature iW3605; iW3605 AC/DC Digital Power Controller for Bleederless Single-Stage High Power Factor Dimmable LED D.
Manufacture Dialog Semiconductor
Datasheet
Download iW3605 Datasheet




Dialog Semiconductor iW3605
iW3605
AC/DC Digital Power Controller for Bleederless
Single-Stage High Power Factor Dimmable LED Drivers
1.0 Features
2.0 Description
Isolated/non-isolated offline120VAC/230VAC LED driver
up to 25W 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
No bleeder needed with output power down to 5W for
120VAC/230VAC
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 sensing resistor short-circuit protection
xx AC line over-voltage protection
The iW3605 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 iW3605
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 iW3605’s cycle-by-cycle waveform
analysis technology allows for fast dimmer setting response.
When no dimmer is on the line, the iW3605 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 iW3605 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 iW3605 are buck-boost and flyback. It uses
Dialog’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 iW3605 minimizes the external components count by
eliminating the secondary feedback circuit and bleeder
circuit. Additionally, the digital control loop of the iW3605
maintains stable overall operating conditions without the
need for loop compensation components.
3.0 Applications
Dimmable LED retrofit lamps up to 25W
Dimmable LED luminaires up to 25W
iW3605
Datasheet
Rev. 0.2 Preliminary
1 of 16
© 2014 Dialog Semiconductor (UK)



Dialog Semiconductor iW3605
iW3605
AC/DC Digital Power Controller for Bleederless
Single-Stage High Power Factor Dimmable LED Drivers
AC Input
iW3605
1 SNB
2 VIN
3 NC
7 GND
VCC 8
VSENSE 4
OUTPUT 6
ISENSE 5
Figure 3.1 : iW3605 Simplified Application Circuit
-
Output
+
iW3605
Datasheet
Rev. 0.2 Preliminary
2 of 16
© 2014 Dialog Semiconductor (UK)



Dialog Semiconductor iW3605
iW3605
AC/DC Digital Power Controller for Bleederless
Single-Stage High Power Factor Dimmable LED Drivers
4.0 Pinout Description
iW3605
1 SNB
VCC 8
2 VIN
GND 7
3 NC
OUTPUT 6
4 VSENSE
ISENSE 5
Pin #
1
2
3
4
5
6
7
8
Name
SNB
VIN
NC
VSENSE
ISENSE
OUTPUT
GND
VCC
Type Pin Description
Output Gate drive for active snubber switch
Analog Input Rectified AC line voltage sense
No connection
Analog Input Auxiliary winding voltage sense
Analog Input Primary side current sense
Output Gate drive for main MOSFET switch
Ground Ground
Power Power supply for control logic
iW3605
Datasheet
Rev. 0.2 Preliminary
3 of 16
© 2014 Dialog Semiconductor (UK)







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