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SC440AEVB 数据表(PDF) 4 Page - Semtech Corporation

部件名 SC440AEVB
功能描述  High Efficiency Integrated Driver for 6-Strings of 30mA LEDs
PDF  21 Pages
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制造商  SEMTECH [Semtech Corporation]
网页  http://www.semtech.com
标志 SEMTECH - Semtech Corporation

SC440AEVB 数据表(HTML) 4 Page - Semtech Corporation

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SC440A
4
www.semtech.com
© 2010 Semtech Corp.
Parameter
Symbol
Conditions
Min
Typ
Max
Units
Control Signals
EN, PWM High Voltage
V
EN_H
V
IN
= 4.5V to 27V
2
V
EN, PWM Low Voltage
V
EN_L
V
IN
= 4.5V to 27V
0.4
V
EN, PWM Leakage Current
I
EN_LEAK
V
EN
= V
PWM
= 0V to 5.0V
0.01
1
μA
PWM Dimming Frequency(1)
F
PWM
50
50k
Hz
PWM Dimming Minimum Duty Cycle(1)
D
MIN_PWM
F
PWM
= 200Hz
0.4
%
PWM Dimming Minimum Pulse Width
T
PWM_MIN
F
PWM
= 200Hz
10
μs
FFLAG Voltage
V
FFLAG
I
FFLAG
= 2 mA, normal operation
0.25
V
SS Source Current
I
SS_H
Vss = 0V
6
μA
SS Sink Current
I
SS_L
Vss = 2V at OVP or OTP
1.6
SS Switching Threshold
V
SS_TH
T
J
= 25°C
0.7
0.9
1.05
V
SS End Voltage
V
SS_END
2.6
V
Over-Voltage Protection
OVPIN Threshold Voltage
V
OVPIN_TH
1.475
1.535
1.595
V
OVPIN Leakage Current
I
OVPIN_L
OVPIN = VIN = 20V
0.1
1
μA
OVPRTN Saturation Voltage
V
OVPRTN
I
OVPRTN
=100μA
60
mV
OVPRTN Leakage Current
I
OVPRTN_L
OVPRTN = VIN
1
μA
VOUT Internal Pull-Down in
Over-Voltage Fault
I
OVP
0.9
mA
VOUT Leakage Current
I
VOUT_L
V
OUT
= 40V
0.1
μA
Current Source (IO1 ~ IO6)
Backlight Current Accuracy
IO1~IO6
EN, PWM = 1; T
J
= 25°C
27
30
32
mA
Overshoot Protection Threshold
IO1~IO6
0.8
V
Overshoot Protection Hysteresis
Any of IO1~IO6
100
mV
LED Current Matching (1)
PWM =10% to 100%; T
J
= 25°C
PWM = 200Hz / 500Hz
+/-1
+/-3
%
Maximum LED Current
I
O_MAX
35
mA
LED Short Circuit Protection
Threshold
V
IO_SCP
T
J
= 25°C
2.2
2.35
2.55
V
I
O
Off Leakage Current
I
O_LEAK
EN = 0V, V
IO1
~ V
IO6
= 12V
0.1
1
μA
SCP_EN Bias
I
SCP_EN
SCP_EN = 0V
-40
μA
Over-Temperature Protection
Thermal Shutdown
Temperature
T
OTP
150
°C
Thermal Shutdown Hysteresis
T
OTP_H
30
°C
Notes:
(1) Guaranteed by design.
Electrical Characteristics (continued)
Unless otherwise noted, V
IN
= 12V, -40°C < T
A
= T
J
< 85°C, R
IOSET
= 2kΩ.



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