L6563HTR STMicroelectronics, L6563HTR Datasheet - Page 35

• Manufacturer Part Number: L6563HTR
• Description: IC PFC CTRLR TRANSITION 16SOIC
• Manufacturer: STMicroelectronics

Specifications of L6563HTR

• Mode: Discontinuous (Transition)
• Current - Startup: 90µA
• Voltage - Supply: 10.3 V ~ 22.5 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• For Use With: 497-9082 - EVAL BOARD L6563 (200W)497-8850 - BOARD EVAL FOR L6563/STW55NM60N497-8834 - BOARD DEMO FOR L6563/LL6566A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-9075-2

L6563H
6.8
In table 1 it is possible to find a summary of all of the above mentioned working conditions
that cause the device to stop operating.
Figure 50. Brownout protection (master PFC)
High-voltage start-up generator
Figure 51
generator). It is made up of a high-voltage N-channel FET, whose gate is biased by a 15 MΩ
resistor, with a temperature-compensated current generator connected to its source.
Figure 51. High-voltage start-up generator: internal schematic
The HV generator is physically located on a separate chip, made with BCD off-line
technology able to withstand 700 V, controlled by a low-voltage chip, where all of the control
functions reside.
With reference to the timing diagram of
converter the voltage on the bulk capacitor (Vin) builds up and, at about 80 V, the HV
generator is enabled to operate (HV_EN is pulled high) so that it draws about 1 mA. This
current, minus the device's consumption, charges the bypass capacitor connected from pin
Vcc (16) to ground and makes its voltage rise almost linearly.
shows the internal schematic of the high-voltage start-up generator (HV
RUN
RUN
12
12
Doc ID 16047 Rev 3
L6563H
L6563H
Figure 52
, when power is first applied to the
Application information
L6563H
L6563H
RUN
RUN
12
12
35/49