ATAVRFBKIT Atmel, ATAVRFBKIT Datasheet - Page 17

• Manufacturer Part Number: ATAVRFBKIT
• Description: KIT DEMO BALLAST FOR AT90PWM2
• Manufacturer: Atmel
• Series: AVR®r

Specifications of ATAVRFBKIT

• Main Purpose: Lighting, Ballast Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: AT90PWM2, AT90PWM3
• Primary Attributes: 18 W, Up to 2 Type T8 Lamps, Dimmable, Auto Detect of Swiss or DALI
• Secondary Attributes: Power Factor Corrected (PFC), 90 to 265 VAC, 90 to 370 VDC
• Data Bus Width: 8 bit
• Core Chip: AT90PWM2B
• Topology: Boost
• No. Of Outputs: 1
• Dimming Control Type: Digital
• Kit Contents: Board CD Docs
• Development Tool Type: Hardware / Software - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7597B–AVR–10/07
Device Design & Application
5.5
5.6
5-15
IXYS IXTP3N50P
PolarHV
Channel Power
MOSFET
Clare LDA111S
Optocoupler
TM
N-
The IXTP3N50P is a 3A 500V general purpose power MOSFET that comes from the
family of IXYS PolarHV MOSFETs. When comparing equivalent die sizes, PolarHT
results in 50% lower RDS(ON), 40% lower RTHJC (thermal resistance, junction to
case), and 30% lower Qg (gate charge) enabling a 30% - 40% die shrink, with the same
or better performance versus the 1st generation power MOSFETs.
Within the ballast demonstrator itself the IXTP3N50 serves two functions. The first of
which is the power switching pair of devices in the half-bridge circuit that drives the
lamps. While a third device serves in the main PFC circuit as the power switch that
drives the PFC inductor.
Clare's family of single and dual optocoupler provide an optically isolated means of
switching control circuits. The LDA111S contains one phototransistor that is optically
coupled to an LED. Shunt resistors can be used to adjust the threshold currents
required to activate the output circuitry. While both AC and DC input versions are avail-
able, the LDA111S is a DC input only model and features a
rating, 3750V
The LDA111S role is to isolate control signals within the ballast design.
RMS
input to output isolation, and a 1000% current transfer ratio.
ATAVRFBKIT / EVLB001 User Guide
100mA continuous load