STEVAL-ISB001V1 STMicroelectronics, STEVAL-ISB001V1 Datasheet - Page 7

• 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
1.3
1.4
Primary Current
where,
I
V
I
D
V
I
Primary Inductance
Primary Inductance is expressed as
where,
V
f
D
f
I
For example, if Primary Inductance is set to 5.2mH, the minimum switching frequency is:
ppk
O(max)
prms
s (min)
s(min)
ppk
O
DC(min)
DC (min)
max
max
= Efficiency, equal to 0.7
= Voltage output
= Primary peak current
= Primary peak current
Primary Peak Current is expressed as:
Primary Root Mean Square (RMS) Current is expressed as
= Primary RMS current
= Maximum duty cycle
= Maximum duty cycle
= Minimum switching frequency
= Minimum switching frequency
= Maximum current output
= Minimum input bus voltage
= Minimum Input DC voltage
f
I
ppk
s min
L
I
prms
p
=
=
------------------------------------------
=
V
-------------------------------------- -
D
=
2V
V
------------------------------------------- -
DC min
m ax
f
IN DC m in
I
s min
pp k
O
I
V
O m ax
L
DC min
p
D
------------- -
I
I
D
ppk
p pk
m ax
3
m ax
D
max
=
=
=
0.152
--------------------------- -
0.152
-----------------------------------
0.7
=
90
2
---------------------------- -
0.152
5
90
0.5
0.5
50
0.48
0.5
------- -
3
0.5
90
5.2
=
=
1 Power Transformer Design Calculations
5.92mH
0.062A
=
=
0.152A
57kHz
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