STEVAL-ILB008V1 STMicroelectronics, STEVAL-ILB008V1 Datasheet - Page 20

• 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

Ballast section
20/33
The oscillator characteristic curves represent the half bridge frequency versus the
resistance R placed between RF pin and ground. During preheating R is equal to R
parallel with
value of the
The value of
values please refer to AN2870.
The right value of R during preheating and run mode can be found graphically considering
the curve related with the chosen capacitor and respectively
Figure 10. Oscillator characteristics
Some useful equations are given:
C
R
C
OSC
PRE
OSC
capacitor and are depicted in Figure 10.
whereas during Run mode R is equal to R
is measured between pin 1 (OSC) and 15 (GND); for other capacitor
T
T
PRE
IGN
≅
=
3
T
⋅
Tch
R
PRE
=
. 4
I
⋅
CH
C
63
IGN
C
d
+
R
d
C
d
⋅
ln
⎛
⎜
⎝
. 4
RUN
1
F
5 .
63
PRE
. Each curve is related to a
⎞
⎟
⎠
and F
RUN
“
L6585DE
RUN
in