EVL90WADP-LLCSR STMicroelectronics, EVL90WADP-LLCSR Datasheet - Page 27

• 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 29. Soft-start and delayed shutdown upon overcurrent timing diagram
This function is realized with pin 2 (DELAY), by means of a capacitor C
resistor R
OCP comparator, in addition to discharging C
sources 150 µA from the DELAY pin and charges C
the OCP comparator and the internal current source will be repeatedly activated and C
will be charged with an average current that depends essentially on the time constant of the
current sense filtering circuit, on C
discharge due to R
typically much longer.
This operation will go on until the voltage on C
There is not a simple relationship that links T
determine C
order of 100 ms.
Once C
continuously regardless of the OCP comparator’s output, and the 150 µA current source is
continuously on, until the voltage on C
Equation 9
with T
frequency close to f
resonant circuit. As the voltage on C
PFC_STOP pin is pulled low. Also the internal generator is turned off, so that C
be slowly discharged by R
than 0.3 V, which will take:
Equation 10
MP
Delay
is expressed in ms and C
Delay
Delay
is charged at 2 V the internal switch that discharges C
connected to ground. As the voltage on the ISEN pin exceeds 0.8 V the first
experimentally. As a rough indication, with C
Delay
start
(see
T
can be neglected, considering that the associated time constant is
STOP
Delay
Section 7.3: Soft-start
Doc ID 15308 Rev 5
=
. The IC will restart when the voltage on C
R
Delay
SS
Delay
Delay
and the characteristics of the resonant circuit; the
T
Delay
C
MP
in µF. During this time the L6599A runs at a
Delay
is 3.5V, the L6599A stops switching and the
=
reaches 3.5 V. This phase lasts:
10
SH
ln
SS
Delay
⋅
3
0
, turns on an internal current generator that
C
to C
5 .
3 .
Delay
≈
reaches 2 V, which defines the time T
) to minimize the energy inside the
Delay
2
Delay
5 .
R
. During an overload/short-circuit
, thus it is more practical to
Delay
C
Delay
Delay
Application information
SS
= 1 µF T
is forced low
Delay
Delay
SH
and a parallel
will be less
Delay
will be in the
will now
Delay
27/36
SH
.