参数资料
型号: LT3486EFE#TRPBF
厂商: Linear Technology
文件页数: 4/20页
文件大小: 0K
描述: IC LED DRVR WHITE BCKLGT 16TSSOP
标准包装: 2,500
恒定电流:
拓扑: PWM,升压(升压)
输出数: 2
内部驱动器:
类型 - 主要: 车载,背光
类型 - 次要: 白色 LED
频率: 200kHz ~ 2.25MHz
电源电压: 2.5 V ~ 24 V
输出电压: 36V
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm)裸露焊盘
供应商设备封装: 16-TSSOP-EP
包装: 带卷 (TR)
工作温度: -40°C ~ 85°C
LT3486
TYPICAL PERFORMANCE CHARACTERISTICS
T A = 25°C unless otherwise specified.
V SW2
50V/DIV
I L2
500mA/DIV
V SW1
10V/DIV
I L1
1A/DIV
Switching Waveforms
I LED
200mA/DIV
I L
500mA/DIV
PWM
5V/DIV
PWM Dimming Wavforms
V IN = 3.6V 0.5μs/DIV
8 LEDs/25mA
2 LEDs/320mA
CIRCUIT OF FRONT PAGE APPLICATION
3486 G17
V IN = 12V 0.2ms/DIV
8/8 LEDs
PWM FREQ = 1kHz
3486 G18
LED Current vs PWM Duty Cycle
Wide Dimming Range (1000:1)
V FB vs V CTRL
V FB vs V CTRL
(Temperature Variation)
100
10
V IN = 12V
8/8 LEDs
PWM FREQ = 100Hz
250
200
V IN = 3.6V
T A = 25°C
250
200
± 5mV
T A = 85°C
150
150
T A = –50°C
T A = 25°C
1
100
100
0.1
50
50
0.01
0.01
0.1 1 10
PWM DUTY CYCLE (%)
100
0
0
0.5 1 1.5
CONTROL VOLTAGE (V)
2
0
0
0.5 1 1.5
CONTROL VOLTAGE (V)
2
SHDN Pin Bias Current
(CTRL1 = CTRL2 = 3V)
3486 G01
Open-Circuit Output Clamp
Voltage vs Temperature
3486 G03
Open-Circuit Output Clamp
Voltage vs V IN
3486 G04
140
120
VIN = 3.6V
TA = 50°C
37
V IN = 3.6V
R T = 63.4k
37
V IN = 3.6V
R T = 63.4k
100
80
TA = 25°C
TA = 100°C
36
35
V OUT1
V OUT2
36
35
V OUT1
V OUT2
60
40
20
34
34
0
0
4
8
12
16
20
24
33
–50
–25
0
25
50
75
100
125
33
2
4
6
8 10 12 14 16 18 20 22 24
SHDN PIN VOLTAGE (V)
3486 G05
TEMPERATURE (°C)
3486 G06
V IN (V)
3486 G07
3486fe
4
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