- 您现在的位置：买卖IC网 > PDF目录13932 > LT3511HMS#PBF (Linear Technology)IC REG FLYBK ISO ADJ .24A 16MSOP PDF资料下载
参数资料
| 型号： | LT3511HMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 16/26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： | 无 |
| 工作温度： | -40°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
DESIGN PROCEDURE/DESIGN EXAMPLE
Use the following design procedure as a guide to design-
ing applications for the LT3511. Remember, the unique
sampling architecture requires an iterative process for
Step 2: Calculate maximum power output at minimum
V IN .
P OUT(VIN(MIN)) = η ? V IN(MIN) ? I IN = η ? V IN(MIN) ? D ?
I PEAK ? 0.5
choosing correct resistor values.
The design example involves designing a 15V output with
a 100mA load current and an input range from 36V to 72V.
D =
( V OUT + V F ) ? N PS
( V OUT + V F ) ? N PS + V IN(MIN)
V IN(MIN) = 36V, V IN(NOM) = 48V, V IN(MAX) = 72V, V OUT =
15V and I OUT = 100mA
Step 1: Select the transformer turns ratio.
η = Efficiency = ~75%
I PEAK = Peak switch current = 0.26A
Example:
N PS <
V SW(MAX) – V IN(MAX) – V LEAKAGE
V OUT + V F
D = 0.46
P OUT(VIN(MIN)) = 1.62
N PS <
V SW(MAX) = Max rating of internal switch = 150V
V LEAKAGE = Margin for transformer leakage spike = 40V
V F = Forward voltage of output diode = assume approxi-
mately ~ 0.5V
Example:
150V – 72V – 40V
15V + 0.5V
N PS < 2.45
N PS = 2
I OUT(VIN(MIN)) = P OUT(VIN(MIN)) /V OUT = 0.11A
The chosen turns ratio satisfies the output current re-
quirement of 100mA. If the output current was too low,
the minimum input voltage could be adjusted higher. The
turns ratio in this example is set to its highest ratio given
switch voltage requirements and margin for leakage in-
ductance voltage spike.
Step 3: Determine primary inductance, switching fre-
quency and saturation current.
Primary inductance for the transformer must be set above
a minimum value to satisfy the minimum off and on time
requirements.
The choice of turns ratio is critical in determining output
power as shown earlier in the Output Power section. At
this point, a third winding can be added to the transformer
L PRI ≥
t OFF(MIN) ? N PS ? ( V OUT + V F )
I PEAK(MIN)
to drive the BIAS pin of the LT3511 for higher efficiencies.
Choose a turns ratio that sets the third winding voltage
to regulate between 3.3V and 6V for maximum efficiency.
t OFF(MIN) = 400ns
I PEAK(MIN) = 55mA
Choose a third winding ratio to drive BIAS winding with
5V. (Optional)
L PRI ≥
t ON(MIN) ? V IN(MAX)
I PEAK(MIN)
= THIRD =
Example:
N THIRD
N S
V
V OUT
5V
15V
= 0.33
t ON(MIN) = 100ns
I PEAK(MIN) = 55mA
The turns ratio of the transformer chosen is as follows
N PRIMARY : N SECONDARY : N THIRD = 2:1:0.33.
3511fc
16
相关PDF资料 |
PDF描述 |
|---|---|
| LTC3612IUDC#PBF | IC REG BUCK SYNC ADJ 3A 20QFN |
| RBC13DRAS-S734 | CONN EDGECARD 26POS .100 R/A EXT |
| MAX6795TPYD3+ | IC REG LIN W/SPR VSR 20-TQFN |
| RSC05DRAI-S734 | CONN EDGECARD 10POS .100 R/A PCB |
| MAX6795TPZD4+ | IC REG LIN W/SPR VSR 20-TQFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3511IMS#PBF | 功能描述:IC REG FLYBK ISO ADJ .24A 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:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3511IMS#TRPBF | 功能描述:IC REG FLYBK ISO ADJ .24A 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:2,500 系列:- 类型:降压（降压） 输出类型:固定 输出数:1 输出电压:1.2V，1.5V，1.8V，2.5V 输入电压:2.7 V ~ 20 V PWM 型:- 频率 - 开关:- 电流 - 输出:50mA 同步整流器:是 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 包装:带卷 (TR) 供应商设备封装:10-MSOP 裸露焊盘 |
| LT3511MPMS#PBF | 功能描述:IC REG FLYBK ISO ADJ .24A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3511MPMS#TRPBF | 功能描述:IC REG FLYBK ISO ADJ .24A 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 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:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3512 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Monolithic High Voltage Isolated Flyback Converter |
发布紧急采购，3分钟左右您将得到回复。