SGM3138 Datasheet, PDF (4/11 Pages) SG Micro Corp – Low Dropout Current Source

SGM3138
6-Channel Charge Pump White LED
Driver with Low Dropout Current Source
ELECTRICAL CHARACTERISTICS
(V_IN = 3.6V, EN/SET = V_IN, T_A = +25℃, unless otherwise noted.)
PARAMETER
SUPPLY VOULTAGE AND CURRENT
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 Matching between Any Two Outputs
Line Regulation
Voltage at LED_X to GND
EN/SET LOGIC
Low Time for Shutdown
Low Time for Dimming
High Time for Dimming
Threshold
Logic-High Voltage
Logic-Low Voltage
SYMBOL
CONDITIONS
VIN
IQ
I_Q
I_SHDN
VIN = 4.2V, 1× Mode, ILEDx = 1.25mA
I_OUT = 0mA, 1.5× Mode
EN/SET = GND
VOUT
LEDx unconnected, VIN = 4.2V
C_OUT = 1μF, I_LEDx ≥ 0.9 × I_LEDx-set
f
η
VIN = 3.45V, VLEDx = 3V
Temperature rising
EN/SET = 1
I_LEDx
V_SOURCE
3.2V ≤ V_IN ≤ 5.5V
VLEDx = 3.2V, ILEDx = 20mA
3.3V < VIN < 5.5V, VLEDx = 3.2V, EN/SET = 1
V_IN = 4.2V, EN/SET = 1
tSHDN
tLO
t_HI
V_IH
VIL
MIN TYP MAX UNITS
2.7
5.5
V
210
μA
2
mA
0.1
1
μA
5.8
V
235
μs
190
μs
0.6
1
1.4 MHz
85
%
150
℃
15
℃
300
mA
18
20
22.5 mA
-5
1
5
%
3
%
400
mV
3
ms
0.5
500
µs
0.5
µs
1.2
V
0.6
V
SG Micro Corp
4
www.sg-micro.com