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SC657 数据表(PDF) 3 Page - Semtech Corporation

部件名 SC657
功能描述  Backlight Driver for 5 LEDs with SemPulseTM Interface
PDF  22 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC657 数据表(HTML) 3 Page - Semtech Corporation

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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:
() Tested according to JEDEC standard JESD22-A4
(2) ∆V
F(max) = .0V when VIN = 2.9V, higher VIN supports higher ∆VF(max)
(3) Calculated from package in still air, mounted to 3 x 4.5 (in), 4 layer FR4 PCB 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 Short Circuit Duration . . . . . . . . . . . . . . . . Continuous
ESD Protection Level() (kV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unless otherwise noted, T
A = +25°C for Typ, -40°C to +85°C for Min and Max, TJ(MAX) = 25°C, VIN = 3.7 V, CIN= C= C2= COUT = 2.2µF (ESR = 0.03Ω)
()
Electrical Characteristics
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
(2)
Thermal Information
Thermal Resistance, Junction to Ambient(3) (°C/W) . . 27
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . .+50
Storage Temperature Range (°C) . . . . . . . . . . . -65 to +50
Peak IR Reflow Temperature (0s to 30s) (°C) . . . . . . +260
SC657
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Shutdown Current
I
Q(OFF)
0.
2
µA
Total Quiescent Current
I
Q
All outputs disabled, SPIF = V
IN
(2)
60
00
µA
Charge pump enabled, x Mode, all LEDs on,
I
BLn = 0.5mA
.6
mA
Charge pump in x mode, 2.9V <V
IN < 4.2V, all LEDs
on, I
BLn = 25mA
4.8
Charge pump in .5x, 2x mode, 2.9V <V
IN < 4.2V, all
LEDs on, I
BLn = 25mA
5.9
Maximum Total Output Current
I
OUT(MAX)
V
IN > 2.9V, sum of all active LED currents,
V
OUT(MAX) = 4.2V
25
mA
Backlight Current Setting
I
BLn
Nominal setting for BL thru BL5
0
25
mA
Backlight Current Matching
I
BL-BL
I
BLn = 2mA
(3)
-3.5
±0.5
+3.5
%
Backlight Current Accuracy
I
BL_ACC
I
BLn = 2mA
-8
±.5
+8
%



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