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| 型号： | LT3466EFE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 16TSSOP |
| 标准包装： | 95 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 2 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 800kHz ~ 1.3MHz |
| 电源电压： | 2.7 V ~ 24 V |
| 输出电压： | 39.5V |
| 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： | 管件 |
| 工作温度： | -40°C ~ 85°C |
LT3466
ELECTRICAL CHARACTERISTICS The ● denotes specifications that apply over the full operating temperature
range, otherwise specifications are at T A = 25 ° C. V IN = 3V, V CTRL1 = 3V, V CTRL2 = 3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Converter 1 Current Limit
Converter 2 Current Limit
Converter 1 V CESAT
Converter 2 V CESAT
Switch 1 Leakage Current
Switch 2 Leakage Current
CTRL1 Voltage for Full LED Current
CTRL2 Voltage for Full LED Current
(Note 5)
(Note 5)
I SW1 = 300mA
I SW2 = 300mA
V SW1 = 10V
V SW2 = 10V
●
●
●
●
320
320
1.8
1.8
400
400
360
360
0.01
0.01
5
5
mA
mA
mV
mV
μ A
μ A
V
V
CTRL1 or CTRL2 Voltage to Turn-On the IC
CTRL1 and CTRL2 Voltages to Shut Down the IC
150
50
mV
mV
CTRL1, CTRL2 Pin Bias Current
V CTRL1 = V CTRL2 = 1V
●
8
10
12
μ A
V OUT1 Overvoltage-Lockout Threshold
V OUT2 Overvoltage-Lockout Threshold
Schottky 1 Forward Drop
Schottky 2 Forward Drop
Schottky 1 Reverse Leakage
Schottky 2 Reverse Leakage
Soft-Start Time (Switcher 1)
Soft-Start Time (Switcher 2)
V OUT1 Rising
V OUT2 Rising
I SCHOTTKY1 = 300mA
I SCHOTTKY2 = 300mA
V OUT1 = 20V
V OUT2 = 20V
39.5
39.5
0.85
0.85
600
600
5
5
V
V
V
V
μ A
μ A
μ s
μ s
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT3466E is guaranteed to meet specified performance from
0 ° C to 70 ° C. Specifications over the –40 ° C to 85 ° C operating range are
Note 3: Current flows out of the pin.
Note 4: Guaranteed by design and test correlation, not production tested.
Note 5: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at high duty cycle.
assured by design, characterization and correlation with statistical process
controls.
TYPICAL PERFOR A CE CHARACTERISTICS
V OUT1
50mV/DIV
V SW1
20V/DIV
I L1
100mA/DIV
Switching Waveforms
V OUT1
0.5V/DIV
V CTRL1
2V/DIV
I L1
200mA/DIV
Transient Response
V IN = 3.6V 0.5 μ s/DIV
CIRCUIT OF FIGURE 1
3466 G01
V IN = 3.6V 50 μ s/DIV
I LED1 = 20mA TO 10mA
3466 G02
CIRCUIT OF FIGURE 1
3466fa
3
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