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ALED7709 bảng dữ liệu(PDF) 47 Page - STMicroelectronics

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ALED7709 bảng dữ liệu(HTML) 47 Page - STMicroelectronics

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8.3.7
Output configuration register (OUTCFG)
Table 29. OUTCFG register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Add 12h
OCS[1:0]
PSE[1:0]
TPOINT[1:0]
TSA
Reserved
POR A = 00h
0
0
0
0
0
0
0
0
POR B = 3Eh
0
0
1
1
1
1
1
0
Comments
R/W
R/W
R/W
R/W
R/W
R/W
R/W
-
TSA: Temperature sensing selection (channel current reduction controlled by external NTC circuit)
•
0: Disable
•
1: Enable
TPOINT[1:0]: Transition point for mixed dimming
•
00: 12.5%
•
01: 25%
•
10: 37.5%
•
11: 50%
PSE[1:0]: Phase shift mode selection
•
00: Disable
•
01: 64 clock staggered delay
•
10: CH1&CH2 – CH3&CH4 180° phase shift
•
11: CH1 – CH2 – CH3 – CH4 90° phase shift
OCS[1:0]: Output control slope selection
•
00: Nominal (100 ns typ.)
•
01: 2xNom
•
10: 4xNom
•
11: 8xNom
8.3.8
DC-DC converter configuration register (BOOSTCFG)
Table 30. BOOSTCFG register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Add 13h
FSW[1:0]
DCLKMS[1:0]
Reserved
OVRE
DCLK_DIS
DFSW_DIS
POR A = 00h
0
0
0
0
0
0
0
0
POR B = 06h
0
0
0
0
0
1
1
0
Comments
R/W
R/W
R/W
R/W
-
R/W
R/W
R/W
DFSW_DIS: Disable spread spectrum for FSW set by external resistor
•
0: Enable
•
1: Disable
DCLK_DIS: Disable spread spectrum for main clock
•
0: Enable
•
1: Disable
OVRE: Output voltage regulation
•
0: Disable
ALED7709
Accessing internal registers
DS14214 - Rev 1
page 47/63



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