参数资料
型号: LT3754EUH#TRPBF
厂商: Linear Technology
文件页数: 6/30页
文件大小: 0K
描述: IC LED DVR 16CH 50MA 32QFN
标准包装: 2,500
恒定电流:
拓扑: PWM,升压(升压)
输出数: 16
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 白色 LED
频率: 100kHz ~ 1MHz
电源电压: 6 V ~ 40 V
安装类型: 表面贴装
封装/外壳: 32-WFQFN 裸露焊盘
供应商设备封装: 32-QFN
包装: 带卷 (TR)
工作温度: -40°C ~ 125°C
LT3754
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C, unless otherwise noted.
LED Current Waveforms
3000:1 PWM Dimming (100Hz)
1.525
V REF vs Junction Temperature
1.525
SHDN /UVLO Threshold
vs Junction Temperature
I(LEDx)
20mA/DIV
1.505
1.505
I(L)
1A/DIV
PWM
10V/DIV
5μs/DIV
3754 G04
1.485
1.465
1.485
1.465
1.445
–50
–25
0
25
50
75 100
125
1.445
–50
–25
0
25
50
75 100
125
JUNCTION TEMPERATURE (°C)
3754 G05
JUNCTION TEMERATURE (°C)
3754 G06
2.80
2.70
2.60
SHDN /UVLO Pin (Hysteresis)
Current vs Junction Temperature
5
4
3
V IN Shutdown Current
vs Junction Temperature
V IN = 6V, SHDN /UVLO = 0V
12
10
8
V IN Quiescent Current vs V IN
R ISET = 14.7k
PWM = 1.5V, NO SWITCHING,
V(LED 1-16 ) = 1.2V, CTRL = 0.1V
2.50
6
2.40
2.30
2
1
4
2
PWM = 0V, CTRL = 0.1V
2.20
–50
–25
0
25
50
75 100
125
0
–50
–25
0
25
50
75 100
125
0
0
5
10
15
20
25
30
35
40
JUNCTION TEMPERATURE (°C)
3754 G07
JUNCTION TEMPERATURE (°C)
3754 G08
V IN (V)
3754 G09
V IN Quiescent Current
vs Junction Temperature
Switching Frequency
vs Junction Temperature
V C High Clamp, Active
and Low Clamp Levels
vs Junction Temperature
15
V IN = 6V, R ISET = 14.7k, CTRL = 0.1V
1100
2.5
V C HIGH CLAMP
10
1050
2.0
PWM = 1.5V, NO SWITCHING,
V(LED 1-16 ) = 1.2V, CTRL = 0.1V
1000
RT = 39.2k
1.5
1.0
V C ACTIVE (SWITCHING)
5
PWM = 0V, CTRL = 0.1V
950
0.5
V C LOW CLAMP
0
–50 –25
0
25
50
75 100
125
900
–50 –25
0
25
50
75 100
125
0.0
–50 –25
0
25
50
75 100
125
JUNCTION TEMPERATURE (°C)
3754 G10
JUNCTION TEMPERATURE (°C)
3754 G11
JUNCTION TEMPERATURE (°C)
3754 G12
3754fc
6
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