CPC9909DB Clare, CPC9909DB Datasheet - Page 5

• 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