STEVAL-ISA019V2 STMicroelectronics, STEVAL-ISA019V2 Datasheet - Page 9

• Manufacturer Part Number: STEVAL-ISA019V2
• Description: BOARD EVAL SMPS L6565 3PHASE APP
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of STEVAL-ISA019V2

• Mfg Application Notes: L6565/STC04IE170HV AppNote
• Main Purpose: AC/DC, Primary Side
• Outputs And Type: 1, Isolated
• Power - Output: 80W
• Voltage - Output: 24V
• Current - Output: 3.33A
• Voltage - Input: 250 ~ 850V
• Regulator Topology: Flyback
• Board Type: Fully Populated
• Utilized Ic / Part: L6565, STC04IE170HV
• Input Voltage: 250 V to 850 V
• Output Voltage: 24 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: L6565, STC04IE170HV
• Other names: 497-6339

AN2495
2.1.3
Figure 5.
From
density is about 300 mW/cm
ETD 34 is 7.63 cm
Equation 14
Assuming a 95% efficiency for the transformer, only 4 W can be lost on it, of which about 2.3
is lost on the core while the residual 1.7 W is dissipated on the copper. Achieving this
efficiency is detailed in the following
Wire size
To chose the right wire size we must know the rms current on both the primary and
secondary sides. Since I
Equation 15
By imposing a 1 W loss on the primary side wire, the maximum series resistance can be
calculated as follows:
From Joule’s law we can calculate the resistance of both the primary and secondary
windings.
Equation 16
From that, knowing the copper resistivity at 100 °C (ρ
average wind length L
Equation 17
Figure
R
Relative core losses versus frequency
5, operating at 50 kHz with 220 mT flux excursion, the power dissipation
A
P
PCU
=
P
------------------ -
3
I
PRMS
=
, therefore:
I
CU pri
rms primary
ρ
----------------------- -
t
,
100
,
(L
2
R
peak, primary
t
N
⇒
P
= 5.6 cm), we can easily calculate the wire sections (in cm
p
L
R
3
t
. Once again, referring to the datasheet, the total volume of
=
P
Doc ID 13127 Rev 4
=
=
6.54 10
P
0.65A
2.36Ω
core
= 1.6 A and I
•
Section 2.1.3: Wire
=
–
0.3 7.6
4
and
•
=
R
S
peak, secondary
2.29W
I
=
rms
[
cm
100
P
----------------------- -
I
,
CU sec
SRMS
sec
2
size.
= 2.303 10
]
,
⇒
ondary
2
d
p
⇒
=
= 16 A,
=
0.028 cm
R
S
6.53A
-6
=
Flyback stage design
Ω cm), and the
0.016Ω
[
]
2
).
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