IW3602 Datasheet, PDF (1/19 Pages) Dialog Semiconductor – AC/DC Digital Power Controller for Dimmable LED Drivers

iW3602
AC/DC Digital Power Controller for
Dimmable LED Drivers
1.0 Features
2.0 Description
●● Isolated AC/DC offline 100V_AC/230V_AC LED driver
●● Line frequency ranges from 45Hz to 66Hz
●● Intelligent wall dimmer detection
xx Leading-edge dimmer
xx Trailing-edge dimmer
The iW3602 is a high performance AC/DC offline power
supply controller for dimmable LED luminaires, which uses
advanced digital control technology to detect the dimmer
type and phase. The dimmer conduction phase controls the
LED brightness. The LED brightness is modulated by PWM-
dimming. The iW3602’s unique digital control technology
eliminates visible flicker.
xx No-dimmer detected
xx Unsupported dimmer
●● Hybrid dimming scheme
●● Wide dimming range from 1% up to 100%
The iW3602 can operate with all dimmer schemes including:
leading-edge dimmer, trailing-edge dimmer, as well as
other dimmer configurations such as R-type, R-C type or
R-L type. When a dimmer is not present, the controller can
automatically detect that there is no dimmer.
●● No visible flicker
●● Resonant control to achieve high efficiency, 85% without
dimmer
●● Temperature compensated LED current
●● Small size design
xx Small size input bulk capacitor
xx Small size output capacitor
xx Small transformer
The iW3602 operates in a quasi-resonant mode to provide
high efficiency. The iW3602 provides a number of key
built-in features. The iW3602 uses advanced primary-
side sensing technology to achieve excellent line and load
regulation without secondary feedback circuitry. In addition,
the iW3602’s pulse-by-pulse waveform analysis technology
allows accurate LED current regulation. The iW3602
maintains stability over all operating conditions without the
need for loop compensation components. Therefore, the
iW3602 minimizes external component count, simplifies EMI
design and lowers overall bill of materials cost.
●● Primary-side sensing eliminates the need for opto-
isolator feedback and simplifies design
3.0 Applications
●● Tight LED current regulation ± 5%
●● Dimmable LED luminaires
●● Fast start-up, typically 10µA start-up current
●● Optimized for 3W to 10W output power
●● Hot-plug LED module support
●● Multiple protection features:
xx LED open circuit protection
xx Single-fault protection
xx Over-current protection
xx LED short circuit protection
xx Current sense resistor short circuit protection
xx Over-temperature protection
xx Input over-voltage protection
●● Up to 10W output power
iW3602
Datasheet
Rev. 1.0
1 of 19
© 2015 Dialog Semiconductor (UK) Ltd.