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iW3610 데이터시트 PDF




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부품번호 iW3610 기능
기능 AC/DC Digital Power Controller
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iW3610 데이터시트, 핀배열, 회로
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, 반도체, 판매, 대치품
iW3610
AC/DC Digital Power Controller for Dimmable LED Drivers
6.0 Electrical Characteristics
VCC = 12 V, -40°C ≤ TA ≤ 85°C, unless otherwise specified (Note 1)
Parameter
Symbol Test Conditions
VIN SECTION (Pin 3)
Start-up current
IINST VIN = 10 V, CVCC = 10 µF
Input impedance
VIN Range
VSENSE SECTION (Pin 2)
Input leakage current
Nominal voltage threshold
Output OVP threshold
OUTPUT SECTION (Pin 7)
ZIN After start-up
VIN
IBVS
VSENSE(NOM)
VSENSE(MAX)
VSENSE = 2 V
TA=25°C, negative edge
TA=25°C, negative edge
Output low level ON-resistance
RDS(ON)LO
ISINK = 5 mA
Output high level ON-resistance
Rise time (Note 2)
RDS(ON)HI
tR
ISOURCE = 5 mA
TA = 25°C, CL = 330 pF
10% to 90%
Fall time (Note 2)
tF
TA = 25°C, CL = 330 pF
90% to 10%
Maximum switching frequency
(Note 3)
fSW(MAX)
VCC SECTION (Pin 8)
Maximum operating voltage
Start-up threshold
Undervoltage lockout threshold
Operating current
Zener diode clamp voltage
VCC(MAX)
VCC(ST)
VCC(UVL)
ICCQ
VZ(CLAMP)
VCC rising
VCC falling
CL = 330 pF,
VSENSE = 1.5 V
Min
0
1.523
1.683
11
7
Typ
10
2.5
1.538
1.7
30
60
50
30
200
12
7.5
3.9
19
Max
15
1.8
1
1.553
1.717
16
13
8
4.5
Unit
µA
kW
V
μA
V
V
W
W
ns
ns
kHz
V
V
V
mA
V
Rev. 1.5
iW3610
February 1, 2012
Page 4

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iW3610 전자부품, 판매, 대치품
iW3610
AC/DC Digital Power Controller for Dimmable LED Drivers
8.0 Functional Block Diagram
iW3610 combines two functions: 1) wall dimmer type detection
and dimmer phase measurement; and 2) output LED light
dimming. It uses iWatt proprietary digital control technology,
which consists of: 1) chopping circuit, which helps to increase
the power factor and serves as a dynamic impedance to load
the dimmer and 2) isolated flyback converter. The iW3610
provides a low cost solution which enables LED bulb to dim
with typical wall dimmers. This allows LED bulbs to directly
replace conventional incandescent bulbs with ease. The
iW3610 works with a wide range of dimmers. It can detect
and operate with leading-edge, and trailing-edge dimmers
as well as no-dimmer. The controller operates in critical
conduction mode (CCM) to achieve high power efficiency,
as well as minimum EMI. It incorporates proprietary primary-
feedback constant current control technology to achieve
tight LED current regulation.
Figure 3.1 shows a typical iW3610 application schematic.
Figure 8.1 shows the functional block diagram. The advanced
digital control mechanism reduces system design time and
improves reliability. Start-up algorithms makes sure the VCC
supply voltage is ready before powering up the IC.
The iW3610 provides multiple protection features for current
limit, over voltage protection, and over temperature protection.
The VT function provides temperature drift compensation for
the LED. The external NTC senses the LED temperature,
when the temperature is high, the controller dims the LED
light. When the temperature is over limit, the controller turns
off.
VIN 3
Enable
VIN_A
0.0 V ~ 1.8 V
ZVin
2.5 kΩ
Enable
Start-up
8 VCC
100 µA
VT 4
ADC
MUX
ADC
Dimmer
Detection
and
Dimmer Phase
Measurement
VSENSE 2
Signal
Conditioning
VVMS
VFB
Constant
Current
Control
Gate
Driver
65 kΩ
Gate
Driver
65 kΩ
GND 5
DAC
VOCP
1.9 V
IPEAK
VIPK 0 V ~ 1.8 V
+
1 OUTPUT(TR)
7 OUTPUT
6 ISENSE
Figure 8.1 : iW3610 Functional Block Diagram
Rev. 1.5
iW3610
February 1, 2012
Page 7

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