STEVAL-ILB008V1 STMicroelectronics, STEVAL-ILB008V1 Datasheet - Page 15

• Manufacturer Part Number: STEVAL-ILB008V1
• Description: BOARD EVAL BALLAST FOR L6585DE
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of STEVAL-ILB008V1

• Main Purpose: Lighting, Ballast Control
• Embedded: No
• Utilized Ic / Part: L6585DE
• Primary Attributes: 4 x 18w, T8 Lamps
• Secondary Attributes: Preheating Ignition
• Input Voltage: 90 V to 265 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6585DE
• Other names: 497-10544

L6585DE
5.2
5.2.1
PFC section
TM PFC operation
The PFC stage contains all the features needed to implement a transition mode PFC
controller.
Figure 4.
The control loop can be implemented thanks to the high performance error amplifier and the
very precise internal voltage reference that fixes the non-inverting input of the E/A to 2.52 V
± 2 %.
The control loop reacts in order to bring the inverting input to the same voltage. Connecting
the high voltage rail to INV pin, by means of a voltage divider, the output voltage will be
easily set.
The output of the E/A can be used in order to compensate the control loop with an RC
network or, more often, with a simple capacitor connected between INV and COMP pin.
The output voltage of the E/A is also fed to the multiplier. This block multiplies the waveform
present at the MULT pin by the output of the E/A. The resulting voltage will be used as the
threshold for the current sense input. An internal clamp limits the threshold to a maximum
value equal to 1 V.
In
Figure 5.
Figure 5
the characteristic curves of the multiplier are reported.
PFC section
Multiplier
Application information
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