概览
简介
Combined with a MOSFET, the iW673 can emulate the diode rectifier at the secondary side of the flyback to reduce conduction loss. The iW673 determines the timing of the driver by sensing the voltage across the RDS(ON) to achieve lossless sensing. The iW673 uses proprietary digital adaptive turn-off control technology to minimize the turn-off deadtime of the synchronous rectifier so that the parallel Schottky diode required by conventional synchronous rectifiers can be eliminated. The integrated driver has strong driving capability for high efficiency. The operating power consumption of the controller excluding the driver is less than 4mW at no load to achieve the ultra-low no-load power consumption for 5V applications. The iW673 integrates a pulse linear regulator to maintain the operation of the synchronous rectifier at low system output voltage when the system is operating in constant current (CC) mode.
A DiaSIM simulation model is available for the iW673. For more information and where to download, please visit the DiaSIM page.
特性
- Digital adaptive turn-off control minimizes dead-time and eliminates the parallel Schottky diode
- Integrated pulse linear regulator (PLR) allows SR operation at low system output voltage down to 2.4V in typical 5V, 2.5A USB charger applications
- Wide input operating voltage up to 30V
- Optimized 5V MOSFET gate driver
- Intelligent low power management achieves ultra-low no-load operating current <0.65mA
- Lossless MOSFET VDS sensing for SR timing control
- 6-pin SOT23 package
产品对比
应用
应用
- Compact AC/DC adapters/chargers for media tablets and smart phones
- DiaSIM™ Simulation Model available
设计和开发
软件与工具
软件与工具
| Software title
|
Software type
|
公司
|
|---|---|---|
| DiaSIM™ Simulation Models DiaSIM simulation models let the user test and validate AC/DC power supply designs prior to prototyping.
|
Simulator | 瑞萨电子 |
1 item
|
||
模型
ECAD 模块
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Processing table
| SOT23-6L | Tape & Reel | 1 | ||
| SOT23-6L | Tape & Reel | 1 | ||
| SOT23-6L | Tape & Reel | 1 | ||
| SOT23-6L | Tape & Reel | 1 |
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