LT1952 - 单开关同步正激控制器
LT®1952 / LT1952-1是一款专为控制正激变换器拓扑结构而优化设计的电流模式 PWM 控制器，采用一个主 MOSFET。LT1952 / LT1952-1可提供同步整流器控制，因此得到了极高的效率。一个可编程伏特-秒箝位为用于防止变压器发生饱和的变压器复位提供了安全保障。这使得主端上的 MOSFET 能够以大于 50% 的占空比可靠地运行，以实现高 MOSFET、变压器和整流器利用率。LT1952 具有软起动功能，旨在以受控的方式从停机和欠压闭锁状态退出。与占空比无关的精准 107mV 电流限制门限和软起动功能相组合，以提供“打嗝”短路保护。微功率启动使得 LT1952 能够在高输入电压情况下优化。LT1952-1 允许从较低的输入电压启动。可编程斜率补偿和前沿消隐允许采用多种电感器和 MOSFET 来对环路带宽实施优化。可以在 100kHz 至 500kHz 的频率范围内对每个器件进行编程工作，而且，器件可同步至一个外部时钟。误差放大器是一个真正的运算放大器，因而可采用各种补偿网络。LT1952 / LT1952-1 采用小外形 16 引脚 SSOP 封装。
特点
典型应用  | 应用
封装信息 |
| 器件型号 | 封装 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
|---|---|---|---|---|
| LT1952EGN-1#PBF | SSOP-16 | E | $3.93 | $3.30 |
| LT1952EGN-1#TRPBF | SSOP-16 | E | $3.36 | |
| LT1952EGN#PBF | SSOP-16 | E | $3.93 | $3.30 |
| LT1952EGN#TRPBF | SSOP-16 | E | $3.36 | |
| LT1952IGN-1#PBF | SSOP-16 | I | $4.34 | $3.65 |
| LT1952IGN-1#TRPBF | SSOP-16 | I | $3.71 | |
| LT1952IGN#PBF | SSOP-16 | I | $4.34 | $3.65 |
| LT1952IGN#TRPBF | SSOP-16 | I | $3.71 | |
| LT1952MPGN-1#PBF | SSOP-16 | MP | $13.36 | $9.35 |
| LT1952MPGN-1#TRPBF | SSOP-16 | MP | $9.41 | |
| LT1952MPGN#PBF | SSOP-16 | MP | $13.36 | $9.35 |
| LT1952MPGN#TRPBF | SSOP-16 | MP | $9.41 |
演示电路板
| 器件型号 | 描述 | 价格 |
|---|---|---|
| DC1317A-A | LT1952EGN-1 Active Reset Demoboard | Vin=34V - 75V Vout=3.3V @ 35A | $175.00 |
| DC1317A-B | LT1952EGN-1 Active Reset Demoboard | Vin=18V-72V Vout=5V @ 25A | $175.00 |
| DC1317A-C | LT1952EGN-1/LTC3900 Demo Board | Active Reset, Vin=18V-72V Vout=12V @ 10A | $175.00 |
| DC1317A-D | LT1952EGN-1 Active Reset Demo Board | Vin=18V-72V Vout=24V @ 5A | $175.00 |
| DC1317A-E | LT1952EGN-1 Active Reset Demo Board | Vin=18V-72V Vout=5V @ 12A | $150.00 |
| DC1317A-F | LT1952EGN-1 Active Reset Demo Board | Vin=9V-36V Vout=3.3 @ 22A | $150.00 |
| DC1317A-G | LT1952EGN-1/LTC3900 Demo Board | Active Reset, Vin=9V-36V Vout=12V @ 5A | $175.00 |
| DC1317A-H | LT1952-1 Isolated Demo Board I Sync Forward Controller, Active Reset, 9V ≤ VIN ≤ 36V, 48V @1.5A | $175.00 |
| DC759A | LT1952EGN, LTC1698EGN | 48Vin to 5V at 20A Converter, +Vin = 36V - 72V, +Vout = +5V at 20A | $175.00 |
| DC830A | LT1952EGN-1 | 48Vin to3.3V, 40A Isolated Quarter Brick Teleom DC/DC Converter | $175.00 |
| DC968A-A | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=34V-75V Vout=3.3V @ 30A | $150.00 |
| DC968A-B | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=18V-36V, Vout=5V @ 20A | $175.00 |
| DC968A-C | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=36V-75V, Vout=12V @ 12A | $150.00 |
| DC968A-D | LT1952EGN-1, LTC3900CS8, LT4430ES6 Demo Board | Vin=36V-75V, Vout=28V @ 4A | $175.00 |
- 隔离式正向转换器集成电路规定在 -55°C 至 125°C 的节温范围内工作
- DN347 - Simple Circuit Replaces and Improves on Power Modules at Less Than Half the Price
- R365 - Reliability Data
- Isolated Forward Converter Integrated Circuits Specified over -55°C to 125°C Junction Temperature Range
- LT1952 - Product Press Release
- LT1952 Footprints and Symbols
- LT1952-1/LTC3900 Demo Circuit - Synchronous Forward Converter (36-75V to 3.3V @ 20A)
- LT1952/LTC3900 Demo Circuit - Synchronous Forward Converter (36-75V to 3.3V @ 20A)
