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LTC4449 bảng dữ liệu(PDF) 38 Page - Analog Devices

tên linh kiện LTC4449
Giải thích chi tiết về linh kiện  Quad-Phase, Synchronous Bidirectional Buck or Boost Controller
PDF  48 Pages
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LTC4449 bảng dữ liệu(HTML) 38 Page - Analog Devices

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LTC7872
38
Rev. 0
For more information www.analog.com
MFR_IDAC_VLOW
The MFR_IDAC_VLOW stores the current DAC value to program the VLOW voltage by injecting the current DAC output
to the VFBLOW pin. It is formatted as a 7-bit two’s complement value. Setting BIT[6] = 0 means sourcing current from
the VFBLOW pin; and BIT[6] = 1 means sinking current. The detail is listed in Table 8. The DAC current is only injected
to the VFBLOW pin in buck mode. Sinking current will cause VLOW to rise. The default value for this register is 0x00.
Writes to this register are inhibited when the WP, BIT[0] in MFR_CHIP_CTRL, is set high.
MFR_IDAC_VLOW Message Contents:
BIT
VALUE
MEANING
7
Reserved
6
0
1
0µA
–64µA
5
0
1
0µA
32µA
4
0
1
0µA
16µA
3
0
1
0µA
8µA
2
0
1
0µA
4µA
1
0
1
0µA
2µA
0
0
1
0µA
1µA
MFR_IDAC_VHIGH
The MFR_IDAC_VHIGH stores the current DAC value to program the VHIGH voltage by injecting the current DAC output
to the VFBHIGH pin. It is formatted as a 7-bit two’s complement value. Setting BIT[6] = 0 means sourcing current from
the VFBHIGH pin; and BIT[6] = 1 means sinking current. The detail is listed in Table 8. The DAC current is only injected
to the VFBHIGH pin in boost mode. Sinking current will cause VHIGH to rise in boost mode. The default value for this
register is 0x00. Writes to this register are inhibited when the WP, BIT[0] in MFR_CHIP_CTRL, is set high.
MFR_IDAC_VHIGH Message Contents:
BIT
VALUE
MEANING
7
Reserved
6
0
1
0µA
–64µA
5
0
1
0µA
32µA
4
0
1
0µA
16µA
3
0
1
0µA
8µA
2
0
1
0µA
4µA
1
0
1
0µA
2µA
0
0
1
0µA
1µA
APPLICATIONS INFORMATION



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