SGM3146 Datasheet, PDF (4/12 Pages) SG Micro Corp – Driver with Low Dropout Current Source

SGM3146
8-Channel Charge Pump White LED
Driver with Low Dropout Current Source
ELECTRICAL CHARACTERISTICS
(V_IN = 3.6V, EN/SET = V_IN, typical values are at T_A = +25℃, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
SUPPLY VOLTAGE AND CURRENT
Input Voltage Range
V_IN
2.7
Quiescent Power Supply Current
IQ
VIN = 4.2V, 1× Mode, ILEDx = 0mA
IQ
1.5× Mode, ILEDx = 0mA
Shutdown Supply Current
I_SHDN
EN/SET = GND, V_IN = 4.2V
CHARGE PUMP STAGE
Over-Voltage Limit
VOUT
Start-Up Time
COUT = 1μF, ILEDx ≥ 0.9 × ILEDx-set
Soft-Start Duration
Switching Frequency
f
0.7
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
I_LEDx
3.2V ≤ V_IN ≤ 5.5V
24
Current Matching between Any Two
Outputs
V_LEDx = 3.2V, I_LEDx = 27mA
-4.8
Line Regulation
3.3V < VIN < 5.5V, VLEDx = 3.2V
Voltage at LED_X to GND
V_SOURCE V_IN = 4.2V
EN/SET LOGIC
Low Time for Shutdown
TSHDN
3
Low Time for Dimming
TLO
0.5
High Time for Dimming
T_HI
0.5
Threshold
Logic-High Voltage
V_IH
1.2
Logic-Low Voltage
VIL
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
TYP
MAX UNITS
5.5
V
155
240
µA
1.35
mA
0.01
2.5
µA
5.4
V
280
µs
150
µs
0.93
1.25
MHz
90
%
140
℃
10
℃
300
mA
27
30
mA
1
4.8
%
1.4
%
550
mV
ms
500
µs
µs
V
0.4
V
3.48
V
3.65
V
SG Micro Corp
4
www.sg-micro.com