ICB2FL02G Infineon Technologies, ICB2FL02G Datasheet - Page 21

• Manufacturer Part Number: ICB2FL02G
• Description: IC SMART BALLAST CONTROL DSO-19
• Manufacturer: Infineon Technologies
• Type: Ballast Controllerr

Specifications of ICB2FL02G

• Frequency: 20 ~ 120 kHz
• Current - Supply: 4.2mA
• Operating Temperature: -25°C ~ 125°C
• Package / Case: DSO-19
• Packages: PG-DSO-19
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Supply: -
• Lead Free Status / Rohs Status: Details
• Other names: ICB2FL02GINTR

2.4.2 PFC Bus Voltage Sensing
Over voltage, open loop, bus 95 % and under voltage states (Figure 15) of the PFC bus voltage are
sensed at the PFCVS pin via the network R14, R15, R20 and C11 Figure 3 (C11 acts as a spike
suppression filter).
The bus voltage loop control is completely integrated (Figure 16) and provided by an 8 Bit sigma –
delta A/D – converter with a typical sampling rate of 280 µs and a resolution of 4 mV/Bit. After leaving
phase 2 (monitoring), the IC starts the power up (VCC > 14.1V). After power up, the IC senses for
130µs the bus voltage below 12.5% (open loop) or above 105% (bus over voltage). In case of a bus
over voltage (V
the gate drives of the PFC within 5µs respective in 1µs. In this case, the PFC restarts automatically
when the bus voltage is within the corridor (12.5% < V
the 130µs valid, the bus voltage sensing is set to 12.5% < V
thresholds for longer than 1µs (open loop) or 5µs (overvoltage) the PFC gate drive stops working until
the voltage drops below 105% or exceeds the 12.5% level. If the bus over voltage (>109%) lasts for
longer than 625ms in run mode, the inverter gates also shut off and a power down with complete
restart is attempt (Figure 15).
Figure 15 PFC Bus Voltage Operating Level and Error Detection
When the rated bus voltage is in the corridor of 12.5% < V
the bus voltage exceeds the 95 % threshold (Figure 15 phase 3) within 80 ms before entering the soft
start phase 4. Another threshold is activated when the IC enters the run mode (phase 8). When the
rated bus voltage drops below 75% for longer than 84 µs, a power down with a complete restart is
attempted when a counter exceeds 800 ms. In case of a short term bus under voltage (the bus voltage
reaches its working level in run mode before exceeding typically 800 ms (min. 500ms) the IC skips
phases 1 until 5 and starts with ignition (condition for emergency lighting see 2.7.1). The internal
reference level of the bus voltage sense V
accuracy. A surge protection is activated in case of a rated bus voltage of V
current sense voltage of V
Preliminary Datasheet
2.4.2.1
2.4.2.2
BUSrated
Bus Over Voltage and PFC Open Loop
Bus Voltage 95% and 75% Sensing
> 109 %) or open loop (V
LSCS
> 0.8V for longer as 500ns in PRE RUN and RUN Mode.
2
nd
Generation FL-Controller for FL-Ballasts
PFCVS
Page 21 of 55
BUSrated
is 2.5 V (100 % of the rated bus voltage) with a high
BUSrated
< 12.5 %) in phases 3 until 8 the IC shuts off
BUSrated
BUSrated
< 105 %) again. Is the bus voltage after
< 109 %, the IC will check whether
< 109 %. In case leaving these
Functional Description
BUS
> 109% and a low side
ICB2FL02G
V1.2