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SC656 数据表(PDF) 3 Page - Semtech Corporation

部件名 SC656
功能描述  Backlight Driver for 7 LEDs with Charge Pump and PWM Control
PDF  17 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC656 数据表(HTML) 3 Page - Semtech Corporation

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SC656
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-B.
(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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unless otherwise noted, T
A = +25°C for Typ, -40°C to +85°C for Min and Max, TJ(MAX) = 25°C, VIN = 3.7V, CIN= COUT = C= C2= 2.2µF, (ESR = 0.03Ω),
500µA < I
FS_BL < 25mA, Duty Cycle of PWM = 00%, All 7 LEDs connected and enabled as a single bank.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Shutdown Current
I
Q(OFF)
T
A = 25°C
0.
2
µA
Quiescent Current
I
Q
x mode, V
IN = 3.7V, 7 LEDs at mA on main bank,
PWM duty cycle = 5%, R
ISETM = 4.99kΩ
2.5
mA
.5x mode, V
IN = 3.2V, 7 LEDs at mA on main bank,
PWM duty cycle = 5%, R
ISETM = 4.99kΩ
2.8
2x mode, V
IN = 2.9V, 7 LEDs at mA on main bank,
PWM duty cycle = 5%, R
ISETM = 4.99kΩ
3.0
Maximum Total Output Current
I
OUT(MAX)
V
IN > 3.0V, sum of all active LED currents,
V
OUT(MAX) = 4.2V
75
mA
Backlight Current Setting
I
FS_BL
PWM duty cycle = 00%, 200kΩ ≥ R
ISETX ≥ 4kΩ
0.5
25
mA
Current Gain()
I
GAIN
Gain from I
ISETX to IFS_BL
00
A/A
Current Set Voltage
V
IN - ISET
Voltage across R
ISETX

V
Backlight Current Matching(2)
I
BL-BL
I
FS_BL = 2mA, Duty = 00%
-3.5
±0.5
+3.5
%
Backlight Current Accuracy
I
BL_ACC
I
FS_BL = 2mA, Duty = 00%
±.5
%
EN/PWM Input Frequency
f
EN/PWM
Duty-cycle percentage changes linearly with I
FS_BL
0.2
50
kHz
ENM, ENS Minimum High
t
HIGH_MIN

µs
Electrical Characteristics
Recommended Operating Conditions
Ambient Temperature Range (°C). . . . . . . . . . -40 ≤T
A ≤ +85
Input Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 to 5.5
Output Voltage (V) . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 5.25
VoltageDifferencebetweenanytwoLEDs(V)...∆V
F ≤ .0
(2)
Thermal Information
Thermal Resistance, Junction to Ambient(3) (°C/W) . . . 40
Maximum Junction Temperature (°C) . . . . . . . . . . . . . . +50
Storage Temperature Range (°C) . . . . . . . . . . . -65 to +50
Peak IR Reflow Temperature (0s to 30s) (°C) . . . . . . +260



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