STEVAL-ISB001V1 STMicroelectronics, STEVAL-ISB001V1 Datasheet - Page 8

• 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

1 Power Transformer Design Calculations
1.5
1.6
1.6.1
8/26
Magnetic Core Size
One of the most common ways to choose a core size is based on Area Product (AP), which is
the product of the effective core (magnetic) cross-section area times the window area available
for the windings.
Using a EE16/8 core and standard horizontal bobbin for this particular application, the equation
used to estimate the minimum AP (in cm
where,
L
I
k
B
Primary Winding
Winding Turns
The effective area of an EE16 core is 20.1mm
of primary winding is calculated as
where,
N
V
D
f
prms
s(min)
A
u
p
max
DC (min)
T = Temperature rise in the core
p
max
B = Flux density swing
e
= Window utilization factor, equal to:
= Primary Inductance
= Primary Winding Turns
= Effective area of the core
–
–
= Primary RMS current
= Saturation magnetic flux density
= Maximum duty cycle
= Minimum switching frequency
= Minimum Input DC voltage
0.4 for margin wound construction, and
0.7 for triple insulated wire construction
N
p
=
V
-------------------------------------- -
f
DC min
s min
AP
D
BA
max
=
e
---------------------------------- -
k
=
u
B
----------------------------------------------------------------------------
0.22
L
max
p
I
prms
4
) is shown as
T
20.1
0.5
2
90
(in the core’s datasheet). The number of turns
1.316
10
0.5
–
6
10
57
3
AN2228 - APPLICATION NOTE
10
3
=
179