STEVAL-ILB008V1 STMicroelectronics, STEVAL-ILB008V1 Datasheet - Page 19

• 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
3.
Figure 8.
4.
Figure 9.
edge blanking is active during this time in order to avoid any detection of hard switching
events, very common during this phase.
Ignition: At the end of the TCH cycle, the EOI pin is left free in high impedance mode.
Therefore, the capacitor connected between EOI and ground is charged by RF through
R
along with it. An exponential decrease in switching frequency causes a linear increase
of the lamp voltage. When the lamp voltage reaches the strike value, the lamp ignites.
Ignition time is set by the value of
During ignition current control protection, anti-ballast choke saturation protection and
leading edge blanking are all active.
Run mode: When the EOI voltage reaches 1.9 V, the IC enters run mode and the
switching frequency is set only by R
choke saturation are now active with a lower threshold, leading edge blanking is not
active and a fast hard switching detector is activated.
PRE
. The current sunk from the RF pin decreases exponentially, and the frequency
Half-bridge protection thresholds during ignition
Half-bridge protection thresholds during run mode
R
PRE
RUN
and C
. Current control protection and anti-ballast
IGN
.
Ballast section
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