EVLB001 Datasheet, PDF (7/35 Pages) ATMEL Corporation – Automatic microcontroller dimmable ballast

Ballast Demonstrator Device Features
LDA111S Optocoupler (by Clare Inc., an IXYS company)
• 100mA continuous load rating
• 3750VRMS input to output isolation
Figure 2-1. Ballast Demonstrator Block Diagram
POWER
VOLTAGE
PFC BOOST REGULATOR
PFC Inductor
T1
D4
UVLO
R9
&
R13
R35
Q1
R2
D2
D3 _IX859
15V
3.3V
Regulator
PFC Driver
R10
&
R14
C9
R39
Q3
INVERTER
RESONATING
INDUCTOR
AND
FILAMENT
TRANSFORMER
BALANCE
TRANSFORMER
AND
LAMPS
2
15V
11
3
11
12
2
IXD611
10
5
Driver
Q4
1
8
6
Driver
C11
C14
7
T4
5
8
Q5
R28
T3
3
10
6
7
R42
Dimming
Control
DALI+
DALI-
Isolated
DALI
SWITCH ^SWITCH
AT90PWMX
PFC_ZCD
V_BUS
V_HAVERSINE
DALI_TX
DALI_RX
SWITCH_CTRL
V_LAMP
I_LAMP
ACMP0/PD7
PSCOUT00/PD0
ADC5/PB2
ADC4/PB7
TXD/DALI/PD3
RXD/DALI/PD4
ADC7/PB6
ADC3/PD6
PSCOUT20/PB0
AMP0+/PB4
PSCOUT21/PB1
AMP0-/PB3
PFC Output
Inverter High
Inverter Low
2-5
7597B–AVR–10/07
ATAVRFBKIT / EVLB001 User Guide