参数资料
| 型号： | LT3571IUD#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 12/16页 |
| 文件大小： | 0K |
| 描述： | IC REG BOOST ADJ 0.47A 16QFN |
| 产品培训模块： | APD Biasing |
| 标准包装： | 2,500 |
| 类型： | 升压（升压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 最高 75V |
| 输入电压： | 2.7 V ~ 20 V |
| PWM 型： | 电流/电压模式 |
| 频率 - 开关： | 250kHz ~ 2MHz |
| 电流 - 输出： | 470mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 16-QFN-EP（3x3） |
LT3571
APPLICATIONS INFORMATION
Setting APD Current Limit
The LT3571 has a unique current loop to limit the APD
current. Choose the sense resistor R SENSE across V OUT
and MONIN pins to set the APD current limit by using the
following formula:
close together as possible. Minimize the length and area
of all traces connected to the switch pin, and always use
a ground plane under the switching regulator to minimize
interplane coupling. The high speed switching current path
is shown in Figure 6. The signal path, including the switch,
output diode and output capacitor contains nanosecond rise
NODE
R SENSE =
200mV
1.2 × I APD (mA) + 0.3mA
and fall times and should be kept as short as possible.
SWITCH
L1
where I APD is the APD current limit.
Layout Hints
HIGH
V OUT
The high speed operation of the LT3571 demands careful
attention to board layout. Advertised performance will not
V IN
FREQUENCY
CIRCULATING
PATH
LOAD
be achieved with a careless layout. To prevent radiation
and high frequency resonance problems, proper layout of
the high frequency switching path is essential. Keep the
output switch (SW pin), diode and output capacitor as
TYPICAL APPLICATIONS
5V to 45V APD Bias Power Supply
L1
500
Figure 6. High Frequency Path
Input Power vs APD Current
3571 F06
V IN
5V
10μH
450
400
OFF ON
V IN
SHDN
SW
V OUT
350
C1
1μF
V REF
CTRL
LT3571
MONIN
50V
R SENSE
20Ω
300
250
200
R T
SYNC
FB
C3
10nF
R1
1M
150
100
R T
12.1k
1MHz
GND MON
APD
R4
49.9Ω
45V
R2
20.5k
C2
0.1μF
50
0
0
0.5
1 1.5 2
APD CURRENT (mA)
2.5
3
C5
10nF
R3
10k
C4
0.1μF
3571 TA02a
3571 TA02b
L: TDK VLF3010AT – 100MR49
C1: TDK X7R C1608X7R1C105KT
C2, C4: MURATA X7R GRM188R72A104KA35
C3: AVX X7R 06031C103K
C5: MURATA X7R GRM155R71H103K
3571fa
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3572 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Full-Bridge Piezo Driver with 900mA Boost Converter |
| LT3572EUF#PBF | 功能描述:IC DRIVER PIEZO DUAL 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 标准包装:1 系列:- 应用:步进电机驱动器，1-2 相，2 相 评估套件:- 输出数:1 电流 - 输出:800mA 电压 - 负载:10 V ~ 28 V 电源电压:4.75 V ~ 5.25 V 工作温度:-20°C ~ 90°C 安装类型:表面贴装 封装/外壳:28-SOP + 2 翼片裸露焊盘 供应商设备封装:28-HSOPHC（15.2x7.9） 包装:剪切带 (CT) 其它名称:869-1268-1 |
| LT3572EUF#TRPBF | 功能描述:IC DRIVER PIEZO DL 20-QFN RoHS:是 类别:集成电路 (IC) >> PMIC - 电机和风扇控制器，驱动器 系列:- 产品变化通告:ATA683(3,4)PLQW Obsolescence 09/Aug/2012 标准包装:1 系列:- 应用:DC 电机控制器，无刷（BLDC），3 相 评估套件:可供 输出数:1 电流 - 输出:100mA 电压 - 负载:5.25 V ~ 20 V 电源电压:5.25 V ~ 20 V 工作温度:-40°C ~ 150°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-VQFN（7x7） 包装:剪切带 (CT) 其它名称:ATA6833-PLQWCT |
| LT3572EUF-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Full-Bridge Piezo Driver with 900mA Boost Converter |
| LT3572EUF-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Full-Bridge Piezo Driver with 900mA Boost Converter |
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