参数资料
型号: LT3590ESC8#TRPBF
厂商: Linear Technology
文件页数: 5/16页
文件大小: 0K
描述: IC LED DRVR WHITE BCKLGT SC-70-8
标准包装: 2,500
拓扑: PWM,降压(降压)
输出数: 1
内部驱动器:
类型 - 主要: 背光
类型 - 次要: 白色 LED
频率: 650kHz ~ 1.05MHz
电源电压: 4.5 V ~ 55 V
输出电压: 55V
安装类型: 表面贴装
封装/外壳: 8-VFSOP(0.492",1.25mm 宽)
供应商设备封装: SC-70-8
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
LT3590
TYPICAL PERFORMANCE CHARACTERISTICS
Sense Voltage (V IN – V LED )
vs V CTRL
Switching Current Limit
vs Duty Cycle
Switching Current Limit
vs Temperature
0.25
0.20
V IN = 48V
I LED = 50mA
T A = 25°C
150
140
T A = 25°C
150
140
130
130
0.15
0.10
0.05
120
110
100
90
120
110
100
90
0
0
0.5
1
1.5
2
80
0
20
40
60
80
100
80
–50 –25
0
25
50
75
100
125
V CTRL (V)
Sense Voltage (V IN – V LED )
vs V IN
3590 G09
DUTY CYCLE (%)
Sense Voltage (V IN – V LED )
vs Temperature
3590 G10
TEMPERATURE (°C)
Switching Frequency over
Temperature
3590 G11
206
I LED = 50mA
206
1000
V IN = 48V
10 WHITE LEDs
204 T A = 25°C
202
200
198
196
204
202
200
198
196
950
900
850
800
750
194
0
10
20
30
40
50
60
194
–50 –25
0
25
50
75
100
125
700
–50 –25
0
25
50
75
100
125
V IN (V)
Internal Regulator
Line Regulation
3590 G12
TEMPERATURE (°C)
Internal Regulator
Load Regulation
3590 G13
TEMPERATURE (°C)
Internal Regulator
V REG vs Temperature
3590 G14
3.40
3.35
T A = 25°C
V CTRL = 0V
I LOAD = 0V
3.40
3.35
T A = 25°C
V CTRL = 0V
I LED = 0V
3.40
3.35
V CTRL = 3.3V
I LOAD = 1mA
3.30
3.25
V CTRL = 3.3V
I LOAD = 1mA
3.30
3.25
V CTRL = 3.3V
I LED = 50mA
3.30
3.25
3.20
0
10
20
30
40
50
60
3.20
0
0.2
0.4
0.6
0.8
1
3.20
–50
–25
0 25 50
75
100
125
V IN (V)
3590 G15
I LOAD (mA)
3590 G16
TEMPERATURE (°C)
3590 G17
3590f
5
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