SGM3124 Datasheet, PDF (4/17 Pages) SG Micro Corp – White LED Charge Pump Current Source with PWM Brightness Control

SGM3124
White LED Charge Pump Current
Source with PWM Brightness Control
ELECTRICAL CHARACTERISTICS
(V_IN = 3.6V, EN1 = EN2 = V_IN, T_A = 25℃, unless otherwise noted.)
PARAMETER
SYMBOL
SUPPLY VOULTAGE AND CURRENT
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
Quiescent Power Supply Current
Shutdown Supply Current
CHARGE PUMP STAGE
Over-Voltage Limit
Start-Up Time
Soft-Start Duration
Switching Frequency
Efficiency
Shutdown Temperature
Shutdown Temperature Hysteresis
Input Current Limit
CURRENT SINKS
Recommended Maximum
Current per Current Sink
Current into Each Current Sink
when ISET is Shorted to GND
Current Matching between Any
Two Outputs
Line Regulation
Reference Voltage for Current Set
Recommended ISET Pin Current Range
I_DX to ISET Current Ratio
Voltage at DX to GND
EN1, EN2
EN1,EN2 High Level Input Voltage
EN1,EN2 Low Level Input Voltage
EN1,EN2 Trip Point Hysteresis
EN2 Input Leakage Current
EN1 Input Leakage Current
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
Frequency Range at PWM
Recommended ON-time for PWM Signal
Shutdown Delay Time
V_IN
I_LED = 25mA
V_IN = 4.2V, 1× mode, EN1 = EN2 = 1 I_SET = 0μA
I_Q
VIN = 4.2V, 1× mode, EN1 = EN2 = 1 ISET = 20μA
IOUT = 0mA, 1.5× mode
I_SD
EN1 = EN2 = GND
V_OUT
LED1 unconnected, V_IN = 4.2V
COUT = 1μF, IDX ≥ 0.9 × IDX_SET
f
η
V_IN = 3.7V, I_LED = 15mA each, V_DX = 3.1V
Temperature rising
EN1 = EN2 = 1, ISET = 100μA
2.7
5.5
V
100
μA
200
μA
2
mA
0.1
1
μA
5.3
V
150
μs
130
μs
0.6
1
1.4 MHz
83
%
160
℃
20
℃
300
mA
I_DX
3.2V ≤ V_IN ≤ 5.5V
30
mA
I_DX
3.0 V ≤ V_IN ≤ 5.5 V
ISET shorted to GND
45
mA
V_DX = 3.1V, T_A = 25℃
-3
0.5
3
%
3V < V_IN < 5.5V, V_LED = 3.1V, EN1 = EN2 = 1, I_SET = 80μA
0.8
%
EN2 = 0, EN1 = 1
200
VISET
EN2 = 1, EN1 = 0
400
mV
EN2 = 1, EN1 = 1
580 600 620
I_set
2
130 μA
K
EN1 = EN2 = 1, I_SET = 80μA
230 255 280
EN2 = 0, EN1 = 1
200
VSOURCE EN2 = 1, EN1 = 0
300
mV
EN2 = 1, EN1 = 1
400
V_IH
VIL
IIKG
I_IKG
V_(UVLO)
EN1, EN2 = GND or EN1, EN2 = VIN = 5.5V
EN1, EN2 = GND or EN1, EN2 = V_IN = 5.5V
Input voltage falling
1.3
V
0.3
V
75
mV
0.1
1
μA
0.1
1
μA
2.1
V
20
mV
0
50 kHz
2.5
μs
0.85
ms
SG Micro Corp
www.sg-micro.com
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