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LT3795IFEPBF PDF预览

LT3795IFEPBF

更新时间： 2022-03-20 15:38:24
品牌 Logo 应用领域
LINEAR_DIMENSIONS 控制器
页数 文件大小 规格书
28页 438K
描述
110V LED Controller with Spread Spectrum Frequency Modulation

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LT3795IFEPBF 数据手册

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LT3795  
elecTrical characTerisTics The ldenotes the specifications which apply over the full operating temperature  
range, otherwise specifications are at TA = 25°C, VIN = 24V, EN/UVLO = 24V, CTRL1 = CTRL2 = 2V, PWM = 5V, unless otherwise noted.  
PARAMETER  
CONDITIONS  
MIN  
TYP  
65  
MAX  
UNITS  
µA  
SENSE Input Bias Current  
SS Sourcing Current  
SS Sinking Current  
Current Out of Pin  
SS = 0V  
±8  
µA  
ISP – ISN = 1V, SS = ±V  
±.8  
µA  
Error Amplifier  
l
l
Full Scale LED Current Sense Threshold  
(ISP-ISN)  
ISP = 48V, CTRL1 ≥ 1.±V, CTRL± ≥ 1.±V  
ISP = 0V, CTRL1 ≥ 1.±V, CTRL± ≥ 1.±V  
±43  
±43  
±50  
±50  
±57  
±57  
mV  
mV  
(V  
)
l
l
9/10th LED Current Sense Threshold  
(V  
ISP = 48V, CTRL1 = 1V, CTRL± = 1.±V  
ISP = 0V, CTRL1 = 1V, CTRL± = 1.±V  
±±0  
±±0  
±±5  
±±5  
±30  
±30  
mV  
mV  
)
(ISP-ISN)  
l
l
1/± LED Current Sense Threshold  
(V  
ISP = 48V, CTRL1 = 0.6V, CTRL± = 1.±V  
ISP = 0V, CTRL1 = 0.6V, CTRL± = 1.±V  
119  
119  
1±5  
1±5  
130  
130  
mV  
mV  
)
(ISP-ISN)  
l
l
1/10th LED Current Sense Threshold  
(V  
ISP = 48V, CTRL1 = 0.±V, CTRL± = 1.±V  
ISP = 0V, CTRL1 = 0.±V, CTRL± = 1.±V  
16  
16  
±5  
±5  
3±  
3±  
mV  
mV  
)
(ISP-ISN)  
l
l
ISP/ISN Current Monitor Voltage (V  
)
V
V
= ±50mV, ISP = 48V, –50µA ꢀ I  
= ±50mV, ISP = 0V, –50µA ꢀ I  
ꢀ 0 µA  
ꢀ 0 µA  
0.96  
0.96  
1
1
1.04  
1.04  
V
V
ISMON  
(ISP-ISN)  
(ISP-ISN)  
ISMON  
ISMON  
l
l
ISP/ISN Overcurrent Protection Threshold  
(V  
ISN = 48V  
ISN = 0V  
360  
360  
375  
375  
390  
390  
mV  
mV  
)
(ISP-ISN)  
CTRL1, CTRL± Input Bias Current  
Current Out of Pin, CTRL = 1V  
50  
±00  
110  
nA  
V
ISP/ISN Current Sense Amplifier Input  
Common Mode Range  
0
ISP/ISN Input Current Bias Current  
(Combined)  
PWM = 5V (Active), ISP = 48V  
PWM = 0V (Standby), ISP = 48V  
700  
0
µA  
µA  
0.1  
ISP/ISN Current Sense Amplifier g  
V
= ±50mV  
(ISP-ISN)  
350  
µS  
kΩ  
nA  
m
V Output Impedance  
C
±000  
V Standby Input Bias Current  
C
PWM = 0V  
–±0  
±0  
l
FB Regulation Voltage (V  
)
FB  
ISP = ISN = 48V  
ISP = ISN = 48V  
1.±30  
1.±38  
1.±50  
1.±50  
1.±70  
1.±64  
V
V
FB Amplifier g  
600  
40  
µS  
nA  
V
m
FB Pin Input Bias Current  
FB Open LED Threshold  
Current Out of Pin, FB = V  
±00  
FB  
OPENLED Falling, ISP = ISN = 48V  
V
V
– 6±mV  
+ 35mV  
V
– 5±mV V – 4±mV  
FB  
FB  
FB  
C/10 Comparator Threshold (V  
)
OPENLED Falling, FB = 1.±5V, ISP = 48V  
OPENLED Falling, FB = 1.±5V, ISN = 0V  
±5  
±5  
mV  
mV  
(ISP-ISN)  
FB Overvoltage Threshold  
TG Rising  
V
+ 50mV V + 60mV  
V
V/V  
mV  
µA  
FB  
FB  
FB  
V Current Mode Gain (∆V /∆V  
C
)
4.±  
VC  
SENSE  
l
FB SHORTLED Threshold  
SHORTLED Falling  
300  
10  
350  
V Pin Source Current  
C
V = 1.±V  
C
V Pin Sink Current  
C
V = 1.±V, FB = 1.4V  
C
30  
µA  
Input Current Sense Amplifier  
l
l
l
Input Current Sense Amplifier Input Voltage  
±.5  
57  
110  
63  
V
Common Range (V /V  
)
IVINP IVINN  
Input Current Sense Threshold  
(V - V  
V
= 48V, V = 48V  
60  
mV  
IVINP  
IN  
)
IVINN  
IVINP  
Input Current Monitor V(IVINCOMP)  
Input Bias Current (I(IVINN))  
V
V
V
-V  
= 50mV  
= 50mV  
0.94  
1
1.06  
V
nA  
µS  
µs  
IVINP IVINN  
-V  
100  
1000  
IVINP IVINN  
Input Current Sense Amplifier g  
-V = 60mV  
IVINP IVINN  
3400  
1
m
Input Step Response (to 502 of Output Step) ∆V  
IVINCOMP Pin Resistance to GND  
= 60mV Step  
SENSE  
15  
kΩ  
3795f  
3
For more information www.linear.com/LT3795  
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