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SC621 Datasheet(PDF) 19 Page - Semtech Corporation

No. de pieza SC621
Descripción Electrónicos  LED Light Management Unit Charge Pump, 4 LEDs, 400mA Flash LED, Dual LDOs, and SemWireTM Interface
PDF  23 Pages
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Fabricante Electrónico  SEMTECH [Semtech Corporation]
Página de inicio  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC621 Datasheet(HTML) 19 Page - Semtech Corporation

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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
00
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.
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
Table 3 — LDO2 Control Bits
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
0000
OFF
0001
3.3V
0010
3.2V
0011
3.1V
0100
3.0V
0101
2.9V
0110
2.8V
0111
2.7V
1000
2.6V
1001
2.5V
1010 through 1111 are not used
OFF
Table 4 — LDO1 Control Bits
Register and Bit Definitions (continued)



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