IW3612 Datasheet PDF - iWatt
| Part Number | IW3612 | |
| Description | AC/DC Digital Power Controller | |
| Manufacturers | iWatt | |
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iW3612
AC/DC Digital Power Controller for
Dimmable LED Drivers
1.0 Features
●● Isolated AC/DC offline 100VAC /230VAC LED driver
●● Line frequency ranges from 45Hz to 66Hz
●● Intelligent wall dimmer detection
xx Leading-edge dimmer
xx Trailing-edge dimmer
xx No-dimmer detected
xx Unsupported dimmer
●● Hybrid dimming scheme
●● Wide dimming range from 1% up to 100%
●● Optimized for PF > 0.7
●● 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
●● Primary-side sensing eliminates the need for
opto-isolator feedback and simplifies design
●● Tight LED current regulation ± 5%
●● Fast start-up, typically 10µA start-up current
●● 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 25W output power
2.0 Description
The iW3612 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. iW3612’s unique digital control technology
eliminates visible flicker.
iW3612 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.
iW3612 operates in quasi-resonant mode to provide
high efficiency. The iW3612 provides a number of key
built-in features. The iW3612 uses iWatt’s advanced primary-
side sensing technology to achieve excellent line and load
regulation without secondary feedback circuitry. In addition,
iW3612’s pulse-by-pulse waveform analysis technology
allows accurate LED current regulation. The iW3612
maintains stability over all operating conditions without the
need for loop compensation components. Therefore, the
iW3612 minimizes external component count, simplifies EMI
design and lowers overall bill of materials cost.
3.0 Applications
●● Dimmable LED luminaires
●● Optimized for 3W - 25W output power
●● Capable of higher output power with enhanced external
driver
iW3612
Rev. 1.6
iW3612
Page 1
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iW3612
AC/DC Digital Power Controller for
Dimmable LED Drivers
6.0 Electrical Characteristics (cont.)
VCC = 12V, -40°C ≤ TA ≤ 85°C, unless otherwise specified (Note 1)
Parameter
Symbol Test Conditions
ISENSE SECTION (Pin 6)
Over-current limit threshold
Isense short protection reference
CC regulation threshold limit (Note 4)
VOCP
VRSNS
VREG-TH
VT SECTION (Pin 4)
Power limit high threshold (Note 4)
(-00, -01)
VP-LIM(HI)
Power limit high threshold (Note 4)
(-03, -05)
VP-LIM(HI)
Power limit low threshold (Note 4)
(-00, -01)
VP-LIM(LO)
Power limit low threshold (Note 4)
(-03, -05)
VP-LIM(LO)
Shutdown threshold (Note 4)
Input leakage current
Pull up current source
VSH-TH
IIN(VT)
IVT
VT = 1.0V
OUTPUT(TR) SECTION (Pin 1)
Output low level ON-resistance
RDS-TR(ON)LO ISINK = 5mA
Min Typ Max Unit
1.83 1.89 1.95
0.16
1.8
V
V
V
0.56 V
1.76 V
0.44 V
0.32 V
0.22 V
1 µA
90 100 110 µA
100 Ω
Notes:
Note 1. Adjust VCC above the start-up threshold before setting at 12V.
Note 2. These parameters are not 100% tested, guaranteed by design and characterization.
Note 3. Operating frequency varies based on the line and load conditions, see Theory of Operation for more details.
Note 4. These parameters refer to digital preset values, and are not 100% tested.
Rev. 1.6
iW3612
Page 5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for IW3612 electronic component. |
| Information | Total 18 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ IW3612.PDF Datasheet ] | |
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