Power Controller. CR5608 Datasheet

CR5608 Controller. Datasheet pdf. Equivalent

Part CR5608
Description AC/DC Digital Power Controller
Feature CR5608 AC/DC Digital Power Controller for Single-Stage High Power Factor Dimmable LED Drivers 1.0 F.
Manufacture iWatt
Datasheet
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CR5608 AC/DC Digital Power Controller for Single-Stage High CR5608 Datasheet
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CR5608
CR5608
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
1.0 Features
Isolated/non-isolated offline120VAC/230VAC LED driver
up to 15W output power
Wide line frequency range (from 45Hz to 66Hz)
Meets IEC61000-3-2 current harmonic requirement
Total harmonic distortion < 20% with PF > 0.92
Wide dimmer compatibility
xx Leading-edge dimmer
xx Trailing-edge dimmer
Dimming range from 10% to 100%
Resonant control to achieve high efficiency (typical > 82%
without dimmer)
Over-temperature LED current foldback
Small solution size
xx Single-stage topology reduces part counts
xx 90kHz maximum switching frequency enables small
transformer use
Primary-side sensing eliminates the need for opto-isolator
feedback
Tight LED current regulation (± 5%)
Fast start-up (< 0.5s without dimmer)
Compatible with NEMA SSL6 dimming curve standard
Multiple protection features that include:
xx LED open-circuit and short-circuit protection
xx Over-current protection
xx Over-temperature protection
xx Current sense resistor short-circuit protection
xx AC line over-voltage protection
2.0 Description
The CR5608 is a single-stage, high-performance AC/DC
offline power supply controller for dimmable LED luminaires.
It uses advanced digital control technology to detect the
dimmer type, which provides dynamic impedance to interface
with the dimmer and control the LED brightness at the same
time.
With advanced dimmer detection technology, the CR5608
can operate with most wall dimmers including leading-edge
dimmers (R-type or R-L type) and trailing-edge dimmers
(R-C type). The CR5608’s cycle-by-cycle waveform analysis
technology allows for a fast dimmer setting response. When
no dimmer is on the line, the CR5608 optimizes the power
factor and minimizes the current harmonic distortion to the
AC line. In no dimmer condition, output current is regulated
at nominal output current value over a wide input voltage
range.
The CR5608 operates the main power converter that
delivers current to the LED load in quasi-resonant mode
to provide high power efficiency and minimize electro-
magnetic interference (EMI). The commonly used converter
topologies for CR5608 are buck-boost and flyback. It uses
iWatt’s patented PrimAccurateTM 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 CR5608 minimizes the external component count by
simplifying the EMI filter with iWatt’s EZ-EMI® technology.
The intelligent dimmer detection technology minimizes the
bleeding power loss. Additionally, the CR5608 digital control
loop maintains stable overall operating conditions without
the need for loop compensation components.
3.0 Applications
Dimmable LED retrofit lamps up to 15W
Dimmable LED luminaries up to 15W
Rev. 0.2
CR5608
Preliminary
Page 1



CR5608
CR5608
AC/DC Digital Power Controller for
Single-Stage High Power Factor Dimmable LED Drivers
AC Input
-
Output
+
CR5608
1 BLEEDER
2 VIN
VCC 8
VSENSE 4
3 IIN
OUTPUT 6
7 GND
ISENSE 5
Figure 3.1 : CR5608 Simplified Application Circuit
4.0 Pinout Description
CR5608
1 BLEEDER
VCC 8
2 VIN
GND 7
3 IIN
OUTPUT 6
4 VSENSE
ISENSE 5
Pin #
Name
Type Pin Description
1
BLEEDER
Output Gate drive for bleeder switch.
2 VIN Analog Input Rectified AC line voltage sense.
3 IIN Analog Input Rectified AC line current sense.
4
VSENSE
Analog Input Auxiliary winding voltage sense.
5
ISENSE
Analog Input Primary side current sense.
6
OUTPUT
Output Base drive for main BJT switch.
7
GND
Ground Ground.
8 VCC Power Power supply for control logic.
Rev. 0.2
CR5608
Preliminary
Page 2





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