STEVAL-ISB001V1 STMicroelectronics, STEVAL-ISB001V1 Datasheet - Page 9

• Manufacturer Part Number: STEVAL-ISB001V1
• Description: BATTERY CHARGER CELL PHONE
• Manufacturer: STMicroelectronics
• Type: Battery Managementr

Specifications of STEVAL-ISB001V1

• Main Purpose: Power Management, Battery Charger
• Embedded: No
• Utilized Ic / Part: STD1LNK60Z
• Primary Attributes: 1 Cell, 4.7V @ 400mA Out, CV/CC, 85 ~ 265VAC Input, 1.9W
• Secondary Attributes: >65% Efficient, 51 ~ 91mW Standby Input Power
• Input Voltage: 85 V to 265 V
• Output Voltage: 5 V
• Product: Power Management Modules
• Silicon Manufacturer: ST Micro
• Silicon Core Number: STD1LNK60Z-1
• Kit Application Type: Power Management - Battery
• Application Sub Type: Battery Charger
• Kit Contents: Board
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STD1LNK60Z
• Other names: 497-5682

AN2228 - APPLICATION NOTE
1.6.2
1.6.3
1.6.4
Wire Diameter
The current density (A
diameter of primary wire is expressed as
where,
d
I
A
Number of Primary Winding Turns per Layer
The EE16 bobbin window is about 9mm, so if the enamel wiring chosen has a 0.21mm outer
diameter and a 0.17mm Copper diameter, the number of turns per layer is expressed as
where,
N
N
N
Practical Flux Swing
Using the N
where,
V
D
f
A
N
prms
s(min)
p
J
DC(min)
e
p1
p1
p
B = Flux density swing
max
p
= Diameter of primary winding wire
= Current density
= Effective area of the core
= 168 (total turns for all 4 layers)
= Primary Winding Turns
= 42 turns per layer, 4 layers needed
= Layer 1 Primary Winding Turns
= Primary RMS current
= Maximum duty cycle
= Minimum switching frequency
= Minimum input bus voltage
p
B
= 168 value, the practical flux swing is expressed as
=
V
-------------------------------------- -
f
DC m in
s min
J
d
) allowed to flow through the chosen wire is 4A/mm
p
A
=
D
e
N
max
p
4I
---------------- -
A
prms
J
=
N
p1
-------------------------------------------------------------------------- -
168
=
=
4
---------------------- -
---------- -
0.21
20.1
90
4
0.062
90
=
10
43
=
0.5
–
6
0.142mm
57
1 Power Transformer Design Calculations
10
3
=
0.234T
2
. The Copper
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