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PDF ( 数据手册 , 数据表 ) iW3610

零件编号 iW3610
描述 AC/DC Digital Power Controller
制造商 iWatt
LOGO iWatt LOGO 


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iW3610 数据手册, 描述, 功能
iW3610
AC/DC Digital Power Controller for Dimmable LED Drivers
1.0 Features
2.0 Description
Isolated AC/DC offline 100 Vac / 230 Vac
Line frequency ranges from 47 Hz to 64 Hz
Intelligent wall dimmer detection
xx Leading-edge
xx Trailing-edge
xx No-dimmer detected
xx Unsupported dimmer
Hybrid dimming scheme
Wide dimming range from 2% up to 100%
No visible flicker
Resonant control to achieve high efficiency, 85% without
dimmer
Meets Harmonic Requirement, high power factor (0.9)
without dimmer
Temperature control to adjust LED brightness
Small size design
xx small size input bulk capacitor
xx small size output capacitor
xx smallest transformer
Primary-side sensing eliminates the need for opto-
isolator feedback and simplifies design
The iW3610 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 dimming frequency is selectable via
product options. iW3610’s unique digital control technology
eliminates visible flicker.
iW3610 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.
iW3610 operates in quasi-resonant mode to provide high
efficiency. Also the iW3610 provides a number of key
built-in features. Since the iW3610 uses iWatt’s advanced
primary-side sensing technology, it achieves excellent line
and load regulation without secondary feedback circuitry.
In addition, iW3610’s pulse-by-pulse waveform analysis
allows for accurate LED current regulation. The iW3610
also maintains stability over all operating conditions without
the need for loop compensation components. Therefore, the
iW3610 minimizes external component count, simplifies EMI
design and lowers overall bill of materials cost.
3.0 Applications
Dimmable LED luminaires
Tight LED current regulation ± 5%
Fast start-up, typically 10 µA start-up current
Up to 45 W
Precise LED current control
iW3610
Multiple protection features:
xx LED open protection
xx Single-fault protection
xx Over-current protection
xx LED short circuit protection
xx Current sense resistor short protection
xx Over-temperature protection
Rev. 1.5
iW3610
February 1, 2012
Page 1







iW3610 pdf, 数据表
iW3610
AC/DC Digital Power Controller for Dimmable LED Drivers
9.0 Theory of Operation
The iW3610 is a high performance AC/DC off-line power
supply controller for dimmable LED luminaires, which uses
advanced digital control technology to detect the dimmer
type and dimmer phase. The dimmer conduct phase
controls the LED brightness. A PWM-dimming scheme is
used to modulate LED with dimming frequency of 900 Hz
(default) or selectable. The iW3610 eliminates visible flicker.
iW3610 can work with all types of wall dimmers including
leading-edge dimmer, trailing-edge dimmer, as well as
dimmer configurations such as R-type, R-C type or R-L type.
The controller can also work when no dimmer is connected.
iW3610 operates in quasi-resonant mode to provide high
efficiency and simplify EMI design. In addition, the iW3610
includes a number of key built-in protection features. Using
iWatt’s state-of-the-art primary-feedback technology, the
iW3610 removes the need for secondary feedback circuitry
while achieving excellent line and load regulation. iW3610
eliminates the need for loop compensation components
while maintaining stable overall operating conditions. Pulse-
by-pulse waveform analysis allows for accurate LED current
regulations. Hence, iW3610 solutions are high performance,
while maintaining minimal external component count and
low bill of materials.
Primary current sense. Used for cycle by cycle peak current
control.
Pin 7 – OUTPUT
Gate drive for the external MOSFET switch.
Pin 8 – VCC
Power supply for the controller during normal operation. The
controller will start up when VCC reaches 12 V (typical) and will
shut-down when the VCC voltage is below 7.5 V (typical).
High-frequency transients and ripples can be easily generated
on the VCC pin due to power supply switching transitions,
and line and load disturbances. Excess ripples and noises
on VCC may cause the iW3610 to function undesirably, hence
a decoupling capacitor should be connected between the
VCC pin and GND. A ceramic capacitor of minimum 0.1 uF
connected as close as possible to the VCC pin is suggested.
9.2 Wall Dimmer Detections
There are two types of wall dimmers: leading-edge dimmer
and trailing-edge dimmer.
9.1 Pin Detail
Pin 1 – OUTPUT(TR)
AC line before Wall-
dimmer
Gate drive for the chopping circuit MOSFET switch.
Pin 2 – VSENSE
Sense signal input from auxiliary winding. This provides the
secondary voltage feedback used for output regulation.
Pin 3 – VIN
Sense signal input from the rectified line voltage. VIN is
used for dimmer phase detection. The input line voltage is
scaled down using a resistor network. It is used for input
undervoltage and overvoltage protection. This pin also
provides the supply current to the IC during start-up.
Dimmed AC line after
Wall-dimmer
Figure 9.1 : Leading-Edge Wall Dimmer Waveforms
Pin 4 – VT
External shutdown control. If the shutdown control is not
used, this pin should be connected to GND via a resistor.
Pin 5 – GND
Ground.
Pin 6 – ISENSE
Rev. 1.5
iW3610
February 1, 2012
Page 8







iW3610 equivalent, schematic
iW3610
AC/DC Digital Power Controller for Dimmable LED Drivers
12.0 Physical Dimensions
8-Lead Small Outline (SOIC) Package
D
8
E1
5
4
e
TOP VIEW
A1
B
COPLANARITY
0.10 (0.004)
Compliant to JEDEC Standard MS12F
M
Inches
58
MIN MAX
HN
A 0.051 0.067
41
A1 0.0020 0.0060
EXPOSED
B 0.014 0.019
PAD
C 0.007 0.010
BOTTOM VIEW
D 0.189
E 0.150
0.197
0.157
e 0.050 BSC
A H 0.228
N 0.086
SEATING
PLANE
C
α
L M 0.118
L 0.016
α
SIDE VIEWS
Figure 12.1 : Physical dimensions, 8-lead SOIC package
0.244
0.094
0.126
0.050
Controlling dimensions are in inches; millimeter dimensions are for reference only
This product is RoHS compliant and Halide free.
Soldering Temperature Resistance:
[a] Package is IPC/JEDEC Std 020D Moisture Sensitivity Level 3
[b] Package exceeds JEDEC Std No. 22-A111 for Solder Immersion Resistance; package can withstand
10 s immersion < 270˚C
Dimension D does not include mold flash, protrusions or gate burrs. Mold flash, protrusions or gate burrs shall
not exceed 0.15 mm per end. Dimension E does not include interlead flash or protrusion. Interlead flash or
protrusion shall not exceed 0.25 mm per side.
The package top may be smaller than the package bottom. Dimensions D and E are determined at the
outermost extremes of the plastic bocy exclusive of mold flash, tie bar burrs, gate burrs and interlead flash, but
including any mismatch between the top and bottom of the plastic body.
Millimeters
MIN MAX
1.30 1.70
0.05 0.150
0.36 0.48
0.18 0.25
4.80 5.00
3.81 3.99
1.27 BSC
5.79 6.20
2.18 2.39
3.00 3.20
0.41 1.27
13.0 Ordering Information
Part Number
Options
iW3610-00
Optimized for 100 VAC Applications2
iW3610-01
Optimized for 230 VAC Applications2
Note 1: Tape & Reel packing quantity is 2,500/reel.
Note 2: Refer to Section 9.4 Chopping Operation for more information.
Package
SOIC-8
(exposed pad)
SOIC-8
(exposed pad)
Description
Tape & Reel1
Tape & Reel1
Rev. 1.5
iW3610
February 1, 2012
Page 16










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