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SC644 数据表(PDF) 3 Page - Semtech Corporation

部件名 SC644
功能描述  Light Management Unit with 4 LDOs and SemPulse짰Interface
PDF  26 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC644 数据表(HTML) 3 Page - Semtech Corporation

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SC644
3
Exceeding the above specifications may result in permanent damage to the device or device malfunction. Operation outside of the parameters
specified in the Electrical Characteristics section is not recommended.
NOTES:
() subscript n = , 2, 3, and 4.
(2) Tested according to JEDEC standard JESD22-A4-B.
(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB with thermal vias under the exposed pad per JESD5 standards.
Absolute Maximum Ratings
IN, OUT (V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +6.0
C+, C2+ (V) . . . . . . . . . . . . . . . . . . . . . . . -0.3 to (V
OUT + 0.3)
Pin Voltage — All Other Pins (V) . . . . . . . . . -0.3 to (V
IN + 0.3)
OUT , LDOn() Short Circuit Duration. . . . . . . . . .Continuous
ESD Protection Level(2) (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Recommended Operating Conditions
Ambient Temperature Range (°C). . . . . . . . -40 ≤ T
A ≤ +85
Input Voltage (V). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 ≤ V
IN ≤ 5.5
Output Voltage (V). . . . . . . . . . . . . . . . . . . . . . 2.5 ≤ V
OUT ≤ 5.25
Voltage difference between any two LEDs (V) . . . ∆V
F ≤ .0
Thermal Information
Thermal Resistance, Junction to Ambient(3) (°C/W) . . . . 35
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +50
Storage Temperature Range (°C). . . . . . . . . . . . -65 to +50
Peak IR Reflow Temperature (0s to 30s) (°C) . . . . . . +260
Unless otherwise noted, T
A = +25°C for Typ, -40ºC to +85°C for Min and Max, TJ(MAX) = 25ºC, VIN = 3.7V, C= C2 = 2.2µF, CIN = COUT = 4.7µF,
(ESR = 0.03Ω)()
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Supply Specifications
Input Supply Voltage
V
IN
2.9
5.5
V
Shutdown Current
I
Q(OFF)
Shutdown, V
IN = 4.2V
0.
2.0
µA
Total Quiescent Current
I
Q
Sleep (all LDOs off), SPIF = V
IN
(2)
90
35
µA
Sleep (all LDOs on), SPIF = V
IN
(2)
300
450
x mode, I
OUT = 3.0 mA, IBLn
(3)
= 0.5mA, 6 LEDs on
2.6
mA
x mode, I
OUT = 50mA, IBLn = 25mA, 6 LEDs on
4.8
.5x or 2x mode, I
OUT = 50mA, IBLn = 25mA, 6 LEDs on
5.6
Charge Pump Electrical Specifications
Maximum Total Output Current
I
OUT(MAX)
Sum of all active LED currents,
V
OUT ≤ 4.2V
50
mA
Backlight Current Setting Range
I
BL
Nominal setting for BL – BL6
0
25
mA
Backlight Current Accuracy
I
BL_ACC
I
BLn = 2mA
-8
±.5
8
%
Backlight Current Matching(4)
I
BL-BL
I
BLn = 2mA
-3.5
±0.5
+3.5
%
x Mode to .5x Mode
Falling Transition Voltage
V
TRANSx
I
OUT = 50mA, IBLn = 0mA, VOUT = 3.2V
3.22
V
.5x Mode to x Mode Hysteresis
V
HYSTx
I
OUT = 50mA, IBLn = 0mA, VOUT = 3.2V
250
mV
Electrical Characteristics



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