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參數資料
| 型號： | SC621ULTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and SemWireTM Interface |
| 中文描述： | LED燈管理股電荷泵，4個LED，400mA的閃光LED，雙LDO，和SemWireTM接口 |
| 文件頁數： | 19/23頁 |
| 文件大小： | 320K |
| 代理商： | SC621ULTRT |
SC621
19
Table 2 — Flash/Spotlight Control Bits
FL_2
FL_1
FL_0
FL/
SPLB
Flash/Spotlight
Current (mA)
0
0
0
0
OFF
0
0
1
0
50
0
1
0
0
100
0
1
1
0
150
1
0
0
0
200
1
0
1
0
250
1
1
0
0
250
1
1
1
0
250
0
0
0
1
OFF
0
0
1
1
300
(1)
0
1
0
1
350
(1)
0
1
1
1
400
(1)
1
0
0
1
400
(1)
1
0
1
1
400
(1)
1
1
0
1
400
(1)
1
1
1
1
400
(1)
Note:
(1) When on continuously, the device may reach the temperature
limit with
300mA and higher.
FL/SPLB
This bit is used to select either the flash or spotlight
current ranges. If this bit is set, the FL current sink can
be used to drive a flash of maximum duration 500ms and
the current range will be the high (flash) current range. If
this bit is cleared, the FL current sink can be used to drive
a continuous spotlight at a lower current and the current
range will be the lower (spotlight) current range, as shown
in Table 2.
LDO Control Register (0x03)
This register is used to enable the LDOs and to set their
output voltages.
LDO2[2:0]
These bits are used to set the output voltage of LDO2, as
shown in Table 3.
Table 3 — LDO2 Control Bits
LDO2_2
LDO2_1
LDO2_0
LDO2
Output Voltage
0
0
0
OFF
0
0
1
1.8V
0
1
0
1.7V
0
1
1
1.6V
1
0
0
1.5V
101 through 111 are not used
OFF
LDO1[3:0]
These bits set the output voltage of LDO1, as shown in
Table 4.
LDO1_3
LDO1_2
LDO1_1
LDO1_0
LDO1
Output
Voltage
0
0
0
0
OFF
0
0
0
1
3.3V
0
0
1
0
3.2V
0
0
1
1
3.1V
0
1
0
0
3.0V
0
1
0
1
2.9V
0
1
1
0
2.8V
0
1
1
1
2.7V
1
0
0
0
2.6V
1
0
0
1
2.5V
1010 through 1111 are not used
OFF
Table 4 — LDO1 Control Bits
Register and Bit Definitions (continued)
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