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SC624 Arkusz danych(PDF) 4 Page - Semtech Corporation

Numer części SC624
Szczegółowy opis  LED Light Management Unit Charge Pump, 4 LEDs, Dual LDOs, and SemWireTM Interface
Download  22 Pages
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Producent  SEMTECH [Semtech Corporation]
Strona internetowa  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SC624 Arkusz danych(HTML) 4 Page - Semtech Corporation

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SC624
4
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Fault Protection (continued)
Charge Pump
Over-Voltage Protection
V
OVP
VOUT pin open circuit, V
OUT
= V
OVP
rising threshold
5.3
5.7
6.0
V
Undervoltage Lockout
V
UVLO
Decreasing V
IN
2.4
V
V
UVLO-HYS
300
mV
Charge Pump Electrical Specifications
Maximum Total Output
Current
I
OUT(MAX)
V
IN
> 3.4V, sum of all active LED currents,
V
OUT(MAX)
= 4.2V
100
mA
Backlight Current Setting
I
BL
Nominal setting for BL1 thru BL4
0.5
25
mA
Backlight Current Accuracy
I
BL_ACC
V
IN
= 3.7V, I
BL
= 12mA, T
A
= 25°C
-8
±1.5
+8
%
Backlight Current Matching
I
BL-BL
V
IN
= 3.7V, I
BL
= 12mA(2)
-3.5
±0.5
+3.5
%
1x Mode to 1.5x Mode
Falling Transition Voltage
V
TRANS1x
I
OUT
= 40mA, I
BLn
= 10mA, V
OUT
= 3.2V
3.27
V
1.5x Mode to 1x Mode
Hysteresis
V
HYST1x
I
OUT
= 40mA, I
BLn
= 10mA, V
OUT
= 3.2V
250
mV
1.5x Mode to 2x Mode
Falling Transition Voltage
V
TRANS1.5x
I
OUT
= 40mA, I
BLn
= 10mA, V
OUT
= 4.0V(3)
2.92
V
2x Mode to 1.5x Mode
Hysteresis
V
HYST1.5x
I
OUT
= 40mA, I
BLn
= 10mA, V
OUT
= 4.0V(3)
300
mV
Current Sink Off-State
Leakage Current
I
BLn
V
IN
= V
BLn
= 4.2V
0.1
1
μA
Pump Frequency
f
PUMP
V
IN
= 3.2V
250
kHz
LDO Electrical Specifications
LDO1 Voltage Setting
V
LDO1
Range of nominal settings
in 100mV increments
2.5
3.3
V
LDO2 Voltage Setting
V
LDO2
Range of nominal settings
in 100mV increments
1.5
1.8
V
LDO1, LDO2 Output
Voltage Accuracy
V
LDO1,
V
LDO2
V
IN
= 3.7V, I
LDO
= 1mA
-3.5
±3
+3.5
%
Line Regulation
ΔV
LINE
LDO1, I
LDO1
= 1mA, V
OUT
= 2.8V
2.1
7.2
mV
LDO2, I
LDO2
= 1mA, V
OUT
= 1.8V
1.3
4.8
Electrical Characteristics (continued)


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