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ST662A bảng dữ liệu(PDF) 8 Page - STMicroelectronics

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Giải thích chi tiết về linh kiện  DC-DC CONVERTER FROM 5V TO 12V, 0.03A FOR FLASH MEMORY PROGRAMMING SUPPLY
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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ST662A bảng dữ liệu(HTML) 8 Page - STMicroelectronics

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ST662A
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HOW TO INCREASE OUTPUT CURRENT OR OUTPUT VOLTAGE CAPABILITY
Current capability is limited by RON of internal switches. It is possible to increase it connecting in parallel
two or more ST662A devices; each one of them can supply 30mA. The figure 19 shows the electric
schematic. The capacitors C3,C4 and C5 must be placed very close to the ICs on the board. If this is not
possible, you can place two different capacitors, each of them of half value, very close to the respective
integrated circuit.
Fig. 21 show the Output Current capability of the proposed circuit.
If an output voltage greater than 12V is required, it’s possible to realize the circuit of the following diagram
(figure 20). The relevant Output Current capability is shown in figure 22 in which is shown the output
voltage vs load current.
Figure 19 : Application Circuit for Two ST662A in Parallel
TABLE 2: List of Components
CAPACITOR
TYPE
VALUE (µF)
C1A
Ceramic
0.22
C2A
Ceramic
0.22
C1B
Ceramic
0.22
C2B
Ceramic
0.22
C3
Electrolytic Tantalum
10
C4
Electrolytic Tantalum
10
C5
Ceramic
0.22


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