Power Controller. iW3688 Datasheet

iW3688 Controller. Datasheet pdf. Equivalent

iW3688 Datasheet
Recommendation iW3688 Datasheet
Part iW3688
Description AC/DC Advanced Digital Power Controller
Feature iW3688; iW3688 AC/DC Advanced Digital Power Controller for Single-Stage Dimmable LED Drivers 1.0 Features .
Manufacture Dialog Semiconductor
Datasheet
Download iW3688 Datasheet




Dialog Semiconductor iW3688
iW3688
AC/DC Advanced Digital Power Controller for
Single-Stage Dimmable LED Drivers
1.0 Features
2.0 Description
● Isolated/non-isolated off-line 120VAC/230VAC LED driver
up to 20W output power
● Wide line frequency range (from 45Hz to 66Hz)
● Meets IEC61000-3-2 current harmonic requirement
The iW3688 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.
● Total harmonic distortion < 20% with PF > 0.92
● Excellent dimmer compatibility
xx Leading-edge dimmer
xx Trailing-edge dimmer
xx Digital smart dimmer
● Wide dimming range of 1% to 100%
● Intelligent digital control integrating current sink function
into power switching circuit
● Advanced IC power management and voltage sensing
enables the use of off-the-shelf inductor
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:
xx LED open-circuit and short-circuit protection
xx Current sensing resistor open circuit and short-circuit
protection
xx AC line over-voltage protection
xx Over-current protection
With advanced dimmer detection technology, the iW3688
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 iW3688’s
cycle-by-cycle waveform analysis technology allows for fast
dimmer transient response.
In no-dimmer mode, the iW3688 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 iW3688 optimizes the power factor
and minimizes the current harmonic distortion to the AC line.
The commonly utilized converter topologies for iW3688 are
buck-boost and flyback.
The iW3688 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 iW3688 minimizes the external components count by
simplifying the EMI filter with Dialog’s EZ-EMI® technology,
and by integrating current sink, switching, and VCC
charging circuit. Additionally, the iW3688 does not require
an auxiliary winding, which eliminates the need for a custom
inductor. The digital control loop of the iW3688 maintains
stability over all operating conditions without the need for
loop compensation components.
The iW3688 maintains high performance wide-range
dimming and achieves excellent dimmer compatibility with a
simple application circuit.
3.0 Applications
Dimmable LED retrofit lamps up to 20W
● Dimmable LED luminaires up to 20W
iW3688
Datasheet
Rev. 0.3 Preliminary
1 of 20
© 2014 Dialog Semiconductor (UK)



Dialog Semiconductor iW3688
iW3688
AC/DC Advanced Digital Power Controller for
Single-Stage Dimmable LED Drivers
N
L
iW3688
1 VIN
2 CFG2
3 CFG1
4 VCC
5 AGND
6 PGND
7 ISENSE
VCB 14
VD 13
NC 12
CFG4 11
CFG3 10
NC 9
VS 8
-
+
+
Figure 3.1: iW3688 Simplified Application Circuit
iW3688
Datasheet
Rev. 0.3 Preliminary
2 of 20
© 2014 Dialog Semiconductor (UK)



Dialog Semiconductor iW3688
iW3688
AC/DC Advanced Digital Power Controller for
Single-Stage Dimmable LED Drivers
4.0 Pinout Description
iW3688
1 VIN
2 CFG2
3 CFG1
VCB 14
VD 13
NC 12
4 VCC
5 AGND
CFG4 11
CFG3 10
6 PGND
NC 9
7 ISENSE
VS 8
Figure 4.1: 14-Lead SOIC-14 Package
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
VIN
CFG2
CFG1
VCC
AGND
PGND
ISENSE
VS
NC
CFG3
CFG4
NC
VD
VCB
Type Pin Description
Analog Input Rectified AC line voltage input.
Analog Input
Used for dimming mode configuration. See the applications section for
additional information.
Analog Input
Configures OTP threshold on start-up. See the applications section for
configuration information.
Power Power supply for control logic.
Ground
Ground
Signal ground. It should be connected to the power ground on PCB.
Power ground.
Analog Input Current sense.
Analog Input Source voltage of MOSFET.
No
Connection
Analog Input
Not internally connected.
Used for dimming mode confirguration. See the applications section for
additional information.
Analog Input
No
Connection
Used for dimming mode confirguration. See the applications section for
additional information.
Not internally connected.
Analog Input Drain voltage of MOSFET.
Analog Input Input capacitor voltage after EMI filter.
iW3688
Datasheet
Rev. 0.3 Preliminary
3 of 20
© 2014 Dialog Semiconductor (UK)







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