参数资料
型号: LT3511MPMS#PBF
厂商: Linear Technology
文件页数: 9/26页
文件大小: 0K
描述: IC REG FLYBK ISO ADJ .24A 16MSOP
标准包装: 37
类型: 回扫,隔离
输出类型: 可调式
输出数: 1
输出电压: 可调至 150V
输入电压: 4.5 V ~ 100 V
PWM 型: 电流模式,混合
频率 - 开关: 40kHz ~ 650kHz
电流 - 输出: 240mA
同步整流器:
工作温度: -55°C ~ 150°C
安装类型: 表面贴装
封装/外壳: 16-TFSOP(0.118",3.00mm),12 引线
包装: 管件
供应商设备封装: 16-MSOP
LT3511
APPLICATIONS INFORMATION
similar to a nonisolated buck-boost. The duty cycle will
affect the input and output currents, making it hard to
predict output power. In addition, the winding ratio can
be changed to multiply the output current at the expense
of a higher switch voltage.
The graphs in Figures 1-4 show the typical maximum output
power possible for the output voltages 3.3V, 5V, 12V and
24V. The maximum power output curve is the calculated
output power if the switch voltage is 100V during the off-
One design example would be a 5V output converter with
a minimum input voltage of 36V and a maximum input
voltage of 72V. A four-to-one winding ratio fits this design
example perfectly and outputs close to 1.6W at 72V but
lowers to 1W at 36V.
The equations below calculate output power:
Power = η ? V IN ? D ? I PEAK ? 0.5
Efficiency = η = ~85%
time. 50V of margin is left for leakage voltage spike. To
achieve this power level at a given input, a winding ratio
value must be calculated to stress the switch to 100V,
Duty Cycle = D =
( V OUT + V F ) ? N PS
( V OUT + V F ) ? N PS + V IN
resulting in some odd ratio values. The following curves
are examples of common winding ratio values and the
amount of output power at given input voltages.
3.0
Peak switch current = I PEAK = 0.26A
3.5
2.5
2.0
N = N PS(MAX)
N = 15 N = 12
N = 10
N=8
3.0
2.5
N = N PS(MAX)
N=5
N=4
N=6
2.0
N=3
1.5
1.0
0.5
N=4
N=2
1.5
1.0
0.5
N=2
N=1
0
0
20
40 60
80
100
0
0
20
40 60
80
100
INPUT VOLTAGE (V)
3511 F01
Figure 1. Output Power for 3.3V Output
3.0
INPUT VOLTAGE (V)
3511 F03
Figure 3. Output Power for 12V Output
3.0
2.5
N = N PS(MAX)
N=8
N=7
N=6
2.5
N = N PS(MAX)
N=2
2.0
1.5
1.0
0.5
0
N=5
N=4
N=3
N=2
N=1
2.0
1.5
1.0
0.5
0
N=1
0
20
40 60
80
100
0
20
40 60
80
100
INPUT VOLTAGE (V)
3511 F02
Figure 2. Output Power for 5V Output
INPUT VOLTAGE (V)
3511 F04
Figure 4. Output Power for 24V Output
3511fc
9
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LT3512EMS#PBF 功能描述:IC REG FLYBK ISO ADJ .42A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 标准包装:250 系列:- 类型:降压(降压) 输出类型:固定 输出数:1 输出电压:1.2V 输入电压:2.05 V ~ 6 V PWM 型:电压模式 频率 - 开关:2MHz 电流 - 输出:500mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:6-UFDFN 包装:带卷 (TR) 供应商设备封装:6-SON(1.45x1) 产品目录页面:1032 (CN2011-ZH PDF) 其它名称:296-25628-2
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LT3512EMSPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter