SC622A Datasheet, PDF (18/23 Pages) Semtech Corporation – LED Light Management Unit Charge Pump, 400mA Flash LED, Dual LDOs, and I2C Interface

SC622A
Register Map
Address
D7
D6
0x02
0⁽¹⁾
0⁽¹⁾
D5
D4
D3
D2
D1
D0
Reset
Value
Description
Flash/Spotlight
0⁽¹⁾
FLTO
FL_2
FL_1
FL_0 FL/SPLB 0x10
Control
0x03
0⁽¹⁾
LDO2_2 LDO2_1 LDO2_0 LDO1_3 LDO1_2 LDO1_1 LDO1_0 0x00
LDO Control
Notes:
(1) 0 = always write a 0 to these bits
Register and Bit Definitions
Flash/Spotlight Control Register (0x02)
This register is used to configure the flash time-out
feature, the flash or spotlight current, and select flash or
spotlight current ranges.
Table 1 — Flash/Spotlight Control Bits
FL_2 FL_1 FL_0
FL/
SPLB
Flash/Spotlight
Current (mA)
0
0
0
0
OFF
FLTO
0
0
1
0
50
This bit is used to enable the flash safety time-out feature.
0
1
0
0
100
The default state is enabled with FLTO = 1. If this bit is set,
the device will turn off the flash after a nominal period of
0
1
1
0
150
1s. Two ways to re-enable the flash function after a safety
1
0
0
0
200
time-out are:
• Pull the FLEN pin low to re-enable the flash
1
0
1
0
250
function
• Clear and re-write FL[2:0]
1
1
0
0
250
1
1
1
0
250
FL[2:0]
0
0
0
1
OFF
These bits are used to set the current for the flash current
0
0
1
1
300⁽¹⁾
sink when configured for flash or spotlight by the FL/
0
1
0
1
350⁽¹⁾
SPLB bit. Bits FL[2:0] set the flash or spotlight current, as
shown in Table 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.
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