IW2202 반도체 회로 부품 판매점
Digital SMPS Controller
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 iWatt Corporation |
www.DataSheet.co.kr
iW2202
Digital SMPS Controller
Preliminary Data
1 Application
4 Description
Blue-Angel-compliant PFC-controlled switch-mode
power supplies up to 150 watts.
2 Features
§ PulseTrain™ regulation allows voltage, current
and PFC to be controlled independently
§ Primary-only feedback eliminates optoisolators
and simplifies design
§ No loop compensation components required
§ ±1% regulation over a 100:1 load variation
§ Built-in soft-start
§ Adaptive pulseTrain regulation keeps the bulk
capacitor voltage below 400V
§ Operates in critical discontinuous conduction
mode (CDCM)
§ Low start-up and supply current
§ Reduced EMI noise
§ SO-8 package
3 Benefits
§ Ideal for single-stage, single-switch power factor
correction (PFC)
§ Enables 97% power factor correction resulting in
EN6100-3-2 compliance
§ SmartSkip mode provides low standby dissipation
of the power supply enabling Blue Angel
Compliance
§ Efficiency greater than 85% across line and load
variation
§ Universal input (85-270V, 50-60 Hz)
§ Low parts count
§ Reduced design time due to the elimination of
loop compensation design
The iW2202 is a digital switching mode power supply
controller for PFC applications. Its is typically used
with the PFC-corrected BIFRED (Boost Integrated with
Flyback Rectifier/Energy storage DC/DC) topology,
shown in Figure 1. The BIFRED topology is a single-
stage, single-switch topology that combines a boost
converter with an isolated flyback converter, achieving
power-factor correction with a low parts count.
An iW2202-based power supply looks like a resistor to
the AC line. Unlike attempts to control the BIFRED
topology with analog controllers, the all-digital
iW2202 provides a near-unity power factor without
placing high voltage stresses on the bulk capacitor.
The iW2202 uses a proprietary new digital control
technology called pulseTrain™ to achieve efficiencies
in excess of 85% across a wide load range, and across
the universal input range of 85-270VAC, 50-60 Hz.
Internally, the iW2202 uses real-time waveform analysis
to determine crucial circuit parameters. The reflected
secondary voltage of the flyback transformer is sensed
at precisely calculated times to determine the
secondary voltage, the transformer reset time, and the
ideal zero-voltage switching point Measurements are
performed during the OFF time of every cycle, and the
results determine what is done on the next cycle. The
dynamic response time of the circuit is less than half a
cycle.
85-270 V,
50-60 Hz
AC
Input
Boost Inductor
Auxiliary
Winding
Switch
iW2202
Flyback
Winding
Output
+ Vout
Current
Sense
Boost
(Bulk)
Capacitor
GND
Figure 1. iW2202 system concept
Revision 1.1
Page 1
Datasheet pdf - http://www.DataSheet4U.net/
www.DataSheet.co.kr
iW2202 Data Sheet
5 Pin Description
Preliminary Data
VCC 1
8 OUTPUT
VSENSE 2
VIN 3
iW2202
7 PGND
6 GND
VAUX 4
5 ISENSE
Pin #
1
Name
VCC
2 VSENSE
3 VIN
4 VAUX
5 ISENSE
6 GND
7 PGND
8 OUTPUT
Type
Power Input
Analog Input
Analog Input
Analog Input
Analog Input
Signal Ground
Power Ground
Digital Output
Pin Description
Power supply for control logic and voltage sense for power-on reset circuitry
Secondary voltage sense (when used with optional secondary opto-isolator feedback).
Tied to VAUX in normal configuration
Line voltage sense. Used to monitor rectified line voltage for PFC control
Feedback voltage from auxilary winding. Used to monitor output voltage waveform
Primary current sense. Used for cycle-by-cycle peak-current control
Analog/digital ground
Power ground
Gate driver for external MOSFET switch.
6 Absolute Maximum Ratings
PARAMETER
Supply voltage
Input voltage on VSENSE, VIN, VAUX, ISENSE
Power dissipation at TA ≤ 25° C
Storage temperature (TSTG)
Lead temperature, while soldering for ≤ 10 seconds
MIN MAX
0 15
-0.3 6.3
800
-65 150
300
UNITS
V
V
mW
°C
°C
Revision 1.1
Page 2
Datasheet pdf - http://www.DataSheet4U.net/
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제조업체: iWatt Corporation
( iwatt )
IW2202 controller
데이터시트 다운로드 :
[ IW2202.PDF ]
[ IW2202 다른 제조사 검색 ]
국내 전력반도체 판매점
상호 : 아이지 인터내셔날
전화번호 : 051-319-2877
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