SGM3145 Datasheet, PDF (4/12 Pages) SG Micro Corp – 8-Channel PWM Dimming Charge Pump White LED Driver

SGM3145
8-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
VIN
IQ
IQ
I_SHDN
VIN = 4.2V, 1× Mode, ILEDx = 0mA
1.5× Mode, ILEDx = 0mA
EN = GND, V_IN = 4.2V
V_OUT
C_OUT = 1μF, I_LEDx ≥ 0.9 × I_LEDx-set
Switching Frequency
Efficiency
Shutdown Temperature
f
η
At 1× Mode before switching to 1.5× Mode
Temperature rising
Shutdown Temperature Hysteresis
Input Current Limit
CURRENT SINKS
Recommended Maximum Current per
Current Sink
Current Matching between Any Two Outputs
I_LEDx
3.2V ≤ V_IN ≤ 5.5V
V_LEDx = 3.2V, I_LEDx = 27mA
Line Regulation
3.3V < V_IN < 5.5V, V_LEDx = 3.2V
Voltage at LED_X to GND
V_SOURCE V_IN = 4.2V
THRESHOLD OF SWITCHING BETWEEN 1× AND 1.5× MODE
1× Mode to 1.5× Mode
V_LEDX = 3.2V
1.5× Mode to 1× Mode
V_LEDX = 3.2V
EN AND PWM LOGIC
PWM Low Time for Dimming
T_LO
PWM High Time for Dimming
THI
Logic-High Voltage
Threshold
VIH
Logic-Low Voltage
VIL
MIN
TYP
2.7
155
1.35
0.01
5.4
280
150
0.7
0.93
90
140
10
300
24
27
-4.8
1
1.4
550
3.48
3.65
0.5
4
1.2
MAX UNITS
5.5
V
240
µA
mA
2.5
µA
V
µs
µs
1.25
MHz
%
℃
℃
mA
30
mA
4.8
%
%
mV
V
V
µs
µs
V
0.4
V
SG Micro Corp
4
www.sg-micro.com