CPC9909DB Clare, CPC9909DB Datasheet - Page 5
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CPC9909DB
Manufacturer Part Number
CPC9909DB
Description
DEMO BOARD FOR CPC9909SHOULD
Manufacturer
Clare
Specifications of CPC9909DB
Mfg Application Notes
CPC9909 Design Considerations
Current - Output / Channel
350mA
Outputs And Type
1, Non-Isolated
Features
Dimmable
Voltage - Input
90 ~ 265VAC
Utilized Ic / Part
CPC9909
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Other names
CLA329
2. Performance
2.1 Typical Output Waveforms
3. PC Board Layout Considerations
Proper PCB layout should include a short, thick trace
from pin 4 of the CPC9909 internal gate driver to the
gate of the external power MOSFET.
In addition, the current sense resistor, connected to
pin 2, and the one-shot programming resistor,
connected to pin 8, should be placed as close as
possible to pin 2 and pin 8 respectively to minimize
any noise coupling to the CS and RT pins.
R01
Input Voltage = 110VAC
CH3: LED Current, 10mVΩ = 100mA/div
CH4: MOSFET drain voltage, 50V/div
Frequency = 84kHz, positive duty cycle = 55.4%
www.clare.com
Please note that in some cases, during turn-off
transitions of the external power MOSFET, high
current spikes from the external inductor can develop.
In this case, the design may require placing a high
voltage capacitor, 100nF or higher, between the LED+
and LED- terminals to filter these current spikes.
CPC9909 Evaluation Board User’s Guide
5