STEVAL-ISB001V1 STMicroelectronics, STEVAL-ISB001V1 Datasheet - Page 17

• 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
2.7
Constant Voltage And Constant Current
Two resistors, one 3.0
required power dissipation and resistance value.
Similarly, R15 limits the optocoupler’s I
compensates the constant current control.
For the purposes of this application, the devices are:
R
R
C
Note: The parameters of the remaining transformer devices can be seen in the Bill of Materials
(BOM, see
15
18
10
= 75 ,
= 360 , and
= 1nF.
The Constant Voltage (CV) configuration is comprised of the error amplifier TL431, R
R
voltage and compare it with the reference. C11 compensates the error amplifier TL431.
R19 limits the optocoupler diode current I
operation characteristics).
For the purposes of this application, the devices selected are:
R
R
C
R
The Constant Current (CC) can be established simply with a transistor, Q3, R16, R18,
R15, and C10. Output current flows through the sense resistor R16. Q3 is turned on when
the voltage drop of R16 reaches the same value as the base turn-on voltage of Q3. This
increases the current through the optocoupler and the converter goes into constant current
regulation.
R16 senses the output current, and R18 limits the base current of Q3. The rating power of
R16 must then be considered.
If I
22
21
22
11
19
o
, and C
=1k ;
=1k ;
=100nF; and
=150 .
= 0.4A and V
Appendix B: STD1LNK60Z-based RCC Circuit Bill of Materials
11
. TL431 provides the reference voltage. R21 and R22 divide the output
b
= 0.5V, then
and one 2.2 , with SMD1206 footprint are placed in parallel to get the
R
16
=
V
------ -
I
o
b
F
=
diode current for constant current regulation. C10
0.5
------- -
0.4
2 STD1LNK60Z-based RCC Control Circuit Components
F
=
(see
1.25
Figure 5
and
Figure 6 on page 18
).
for
21
17/26
,