SGM3144 Datasheet, PDF (4/12 Pages) SG Micro Corp – Charge Pump White LED Driver

SGM3144
6-Channel PWM Dimming
Charge Pump White LED Driver
ELECTRICAL CHARACTERISTICS
(V_IN = 3.6V, EN = V_IN, T_A = 25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
SUPPLY VOLTAGE 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
V_IN
IQ
IQ
I_SHDN
VIN = 4.2V, 1× Mode, ILEDx = 0mA
1.5× Mode, ILEDx = 0mA
EN = GND, V_IN = 4.2V
VOUT
COUT = 1μF, ILEDx ≥ 0.9 × ILEDx-set
f
Efficiency
η
At 1× Mode before switching to 1.5× Mode
Shutdown Temperature
Temperature rising
Shutdown Temperature Hysteresis
Input Current Limit
CURRENT SINKS
Recommended Maximum Current per
Current Sink
Current Matching between Any Two Outputs
Line Regulation
Voltage at LEDX to GND
I_LEDx
VSOURCE
3.2V ≤ V_IN ≤ 5.5V
V_LEDx = 3.2V, I_LEDx = 27mA
3.3V < VIN < 5.5V, VLEDx = 3.2V
VIN = 4.2V
PWM AND EN LOGIC
PWM Low Time for Dimming
T_LO
PWM High Time for Dimming
THI
Threshold
Logic-High Voltage
VIH
Logic-Low Voltage
V_IL
THRESHOLD OF SWITCHING BETWEEN 1× AND 1.5× MODE
1× Mode to 1.5× Mode
VLEDx = 3.2V
1.5× Mode to 1× Mode
V_LEDx = 3.2V
MIN TYP MAX UNITS
2.7
5.5
V
155 240
µA
1.35
mA
0.01 2.5
µA
5.4
V
280
µs
150
µs
0.7
0.93 1.25 MHz
90
%
140
℃
10
℃
300
mA
24
27
30
mA
-4.8
1
4.8
%
1.4
%
550
mV
0.5
µs
4
µs
1.2
V
0.4
V
3.48
V
3.65
V
SG Micro Corp
4
www.sg-micro.com