ST ISB001V1 User Manual
STEVAL-ISB001V1
Cell phone battery charger demonstration board based on the STD1LNK60Z-1
Features
■Vac = 85 to 265 V
■Output voltage: 4.7 V
■Output power: 1.9 W
■RoHS compliant
Description
The STEVAL-ISB001V1 demonstration board is a ringing choke converter (RCC)-based, step-by- step cell phone battery charger.
The RCC is essential to the self-oscillating flyback converter, and operates within the discontinuous conduction mode (DCM) and continuous conduction mode (CCM) boundaries without noticeable reverse recovery of the output rectifying diodes.
RCC control is achieved by using discrete components to control the peak current mode, so the overall RCC cost is relatively low compared to the conventional pulse width modulation (PWM) IC flyback converter. As a result, RCC is widely used for low-power applications in industry and home appliances as a simple and cost-effective solution.
Data brief
STEVAL-ISB001V1
December 2010 |
Doc ID 18140 Rev 1 |
1/4 |
For further information contact your local STMicroelectronics sales office. |
www.st.com |
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Circuit schematic |
STEVAL-ISB001V1 |
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1 Circuit schematic
Figure 1. RCC control circuit components schematic
VDC |
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T |
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+5V |
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R2 |
C13 |
R3 |
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1N5819 |
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U1A |
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R21 |
D5 |
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+ |
R15 |
R19 |
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C11 |
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C10 |
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STD1LNK60Z |
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TL431 |
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R10 |
C5 |
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3904 |
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Q1 |
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R18 |
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Q3 |
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R22 |
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R9 |
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R11 |
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R16 |
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Q2 |
R11a |
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C6 |
R12 |
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R7 |
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3904 |
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U1B |
+ |
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C4 |
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C7 |
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AI11827 |
Figure 2. STD1LNK60Z-based RCC schematic
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L1 |
R2 |
Vbs |
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T1 |
D7 |
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+5V |
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D1 |
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1 6 |
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1N4007 |
D2 |
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1mH |
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C3 |
R3 |
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1N5819 |
U1A |
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P817 |
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1N4007 |
150K/1W |
222/1KV |
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2 |
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C8 + |
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R21 |
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C1 |
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R1 |
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330µ/16V |
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910 |
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10/1W |
4.7µF/400V |
D5 |
R4 |
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R15 |
R19 |
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5 |
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75 |
150 |
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STTH108 |
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R20 |
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C2 |
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C11 |
C9 + |
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C10 |
2.7 |
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D3 |
4.7µF.400V |
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102/60V |
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47µ/16V |
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1N4007 |
D4 |
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R10 |
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0.1u/60V |
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R5 |
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3 |
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R18 |
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1N4007 |
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C5 |
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R6 |
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R11 |
R13 |
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910 |
U2 |
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R22 |
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Q1 |
5.1 |
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4 |
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Q3 |
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TL431 |
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1K |
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STD1LNK60-1 |
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R12 |
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3904 |
R16 |
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1K |
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3.0 |
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R9 |
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Z1 |
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R14 |
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U1B |
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Q2 |
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+ |
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R17 |
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C6 |
3904 |
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C4 |
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2.2 |
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D6 |
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R7 |
R8 |
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100µ/16V |
CY |
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1N4148 |
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C7 |
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102/Y2 |
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Vbs |
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AI11828 |
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2/4 |
Doc ID 18140 Rev 1 |
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