L6585DETR STMicroelectronics, L6585DETR Datasheet - Page 15

• Manufacturer Part Number: L6585DETR
• Description: IC PFC/BALLAST CONTROL 20-SOIC
• Manufacturer: STMicroelectronics
• Type: PFC/Ballast Controllerr

Specifications of L6585DETR

• Frequency: 58.4 ~ 62 kHz
• Current - Supply: 7mA
• Current - Output: 600mA
• Voltage - Supply: 11 V ~ 16 V
• Operating Temperature: -40°C ~ 150°C
• Package / Case: 20-SOIC (7.5mm Width)
• Switching Frequency: 250 KHz
• Maximum Power Dissipation: 830 mW
• Maximum Operating Temperature: + 150 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8822-2

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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