EVL90WADP-LLCSR STMicroelectronics, EVL90WADP-LLCSR Datasheet - Page 29

• Manufacturer Part Number: EVL90WADP-LLCSR
• Description: EVAL BOARD PORTABLE PWR SUPPLY
• Manufacturer: STMicroelectronics
• Type: Power Factor Correctionr

Specifications of EVL90WADP-LLCSR

• Main Purpose: AC/DC, Primary and Secondary Side with PFC
• Outputs And Type: 1, Isolated
• Power - Output: 90W
• Voltage - Output: 19V
• Current - Output: 4.75A
• Voltage - Input: 90 ~ 264VAC
• Regulator Topology: Boost
• Frequency - Switching: 130kHz
• Board Type: Fully Populated
• Utilized Ic / Part: L6563H, L6599A, SRK2000
• Input Voltage: 90 V to 264 V
• Output Voltage: 19 V
• Dimensions: 65 mm x 155 mm
• Product: Power Management Modules
• Supply Current: 4.75 A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: L6563H, L6599A, SRK2000
• Other names: 497-10377

L6599A
Figure 30. Line sensing function: internal block diagram and timing diagram
With reference to
(Vin
Equation 11
which, solved for R
Equation 12
While the line undervoltage is active the start-up generator keeps on working but there is no
PWM activity, thus the Vcc voltage (if not supplied by another source) continuously
oscillates between the start-up and the UVLO thresholds, as shown in the timing diagram of
Figure 30
As an additional measure of safety (e.g. in case the low-side resistor is open or missing, or
in non-power factor corrected systems in case of abnormally high input voltage) if the
voltage on the pin exceeds 7 V the L6599A is shutdown. If its supply voltage is always above
the UVLO threshold, the IC will restart as the voltage falls below 7 V.
The LINE pin, while the device is operating, is a high impedance input connected to high
value resistors, thus it is prone to pick up noise, which might alter the OFF threshold or give
origin to undesired switch-off of the IC during ESD tests. It is possible to bypass the pin to
ground with a small film capacitor (e.g. 1-10 nF) to prevent any malfunctioning of this kind. If
ON
) and OFF (Vin
.
Vin
Figure 28
H
ON
and R
R
R
OFF
H
−
H
. 1
=
) thresholds of the input voltage:
24
L
Vin
, the following relationships can be established for the ON
, yield:
=
13
Doc ID 15308 Rev 5
ON
13
⋅
−
10
⋅
10
Vin
−
6
−
6
OFF
+
. 1
;
R
24
L
R
L
=
R
Vin
H
Vin
OFF
R
OFF
. 1
H
−
24
. 1
−
24
. 1
Application information
24
=
. 1
R
24
L
29/36