参数资料
型号: LT3754IUH#TRPBF
厂商: Linear Technology
文件页数: 7/30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.
INTV CC vs Current,
Junction Temperature
INTV CC vs Current,
Junction Temperature
INTV CC , UVLO(+), UVLO(–)
vs Junction Temperature
7.0
I LOAD = 10mA, 20mA, 30mA
6.0
V IN = 6V, PWM = 0V
8
7
V IN = 12V
INTV CC (REGULATED)
6.9
6.8
5.5
6
5
I LOAD = 40mA
5.00
4
INTV CC UVLO(+)
6.7
6.6
V IN = 8V, PWM = 0V
–50 –25 0 25
50
75 100
125
4.5
–50
–25
I LOAD = 10mA
I LOAD = 20mA
I LOAD = 30mA
I LOAD = 40mA
0 25
50
75 100
125
3
2
–50 –25
0
25
INTV CC UVLO(–)
50 75 100
125
JUNCTION TEMPERATURE (°C)
INTV CC Current Limit
vs Junction Temperature
3754 G13
JUNCTION TEMPERATURE (°C)
SENSE Threshold
vs Junction Temperature
3754 G14
JUNCTION TEMPERATURE (°C)
3754 G15
Overvoltage Protection (OVP)
Level vs Junction Temperature
60
55
50
45
V IN = 6V, INTV CC = 0V
60.0
57.5
55.0
52.5
50.0
47.5
45.0
INDUCTOR PEAK CURRENT THRESHOLD
(CYCLE-BY-CYCLE)
70
60
50
40
30
20
OVP SET = 1.0V
OVP SET = 0.22V
42.5
10
40
–50 –25
0
25
50
75 100
125
40.0
–50
–25
0
25
50
75 100
125
0
–50
–25
0
25
50
75 100
125
JUNCTION TEMPERATURE (°C)
3754 G16
V OUT – V (LEDx) Short Threshold
vs Junction Temperature
JUNCTION TEMPERATURE (°C)
Minimum ON and OFF Times
vs Junction Temperature
3754 G17
JUNCTION TEMPERATURE (°C)
GATE Rise/Fall Times
vs GATE Capacitance
3754 G18
7.00
6.75
250
225
C GATE = 3300pF
120
100
V IN = 8V, INTV CC = 7V, RT = 523k
6.50
6.25
6.00
5.75
V OUT = 60V
V OUT = 12V
200
175
150
MINIMUM ON-TIME
MINIMUM OFF-TIME
80
60
40
FALL TIME
RISE TIME
5.50
5.25
125
20
5.00
–50
–25
0
25
50
75 100
125
100
–50
–25
0
25
50
75 100
125
0
0
5
10
15
20
JUNCTION TEMPERATURE (°C)
3754 G18
JUNCTION TEMPERATURE (°C)
3754 G20
C GATE (nF)
3754 G21
3754fc
7
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