- 您现在的位置：买卖IC网 > PDF目录17253 > IRAC1166-100W (International Rectifier)BOARD DEMO 100W FOR IR1166 PDF资料下载
参数资料
| 型号： | IRAC1166-100W |
| 厂商： | International Rectifier |
| 文件页数： | 12/25页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 100W FOR IR1166 |
| 标准包装： | 1 |
| 主要目的： | AC/DC，次级 |
| 输出及类型： | 1，隔离 |
| 功率 - 输出： | 100W |
| 输出电压： | 16V |
| 电流 - 输出： | 6.25A |
| 输入电压： | 90 ~ 264VAC |
| 稳压器拓扑结构： | 回扫 |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | IR1166S，IRF7853 |
| 相关产品： | IRF7853TRPBFTR-ND - MOSFET N-CH 100V 8.3A 8-SOIC IRF7853PBF-ND - MOSFET N-CH 100V 8.3A 8-SOIC IR1166SPBF-ND - IC REG CTLR SW 200V 8-SOIC IR1166STRPBFTR-ND - IC MOSFET DRIVER N-CH 200V 8SOIC IR1166STRPBFDKR-ND - IC MOSFET DRIVER N-CH 200V 8SOIC IR1166STRPBFCT-ND - IC MOSFET DRIVER N-CH 200V 8SOIC |
IR1166S
General Description
The IR1166 Smart Rectifier IC can emulate the operation of diode rectifier by properly driving a Synchronous Rectifier (SR)
MOSFET. The direction of the rectified current is sensed by the input comparator using the power MOSFET R DSon as a shunt
resistance and the GATE pin of the MOSFET is driven accordingly. Internal blanking logic is used to prevent spurious
transitions and guarantee operation in continuous (CCM), discountinuous (DCM) and critical (CrCM) conduction mode.
V Gate
V DS
V TH2
V TH1
V TH3
Figure 1: Input comparator thresholds
Flyback Application
The modes of operation for a Flyback circuit differ mainly for the turn-off phase of the SR switch, while the turn-on phase of the
secondary switch (which corresponds to the turn off of the primary side switch) is identical.
Turn-on phase
When the conduction phase of the SR FET is initiated, current will start flowing through its body diode, generating a negative
V DS voltage across it. The body diode has generally a much higher voltage drop than the one caused by the MOSFET on
resistance and therefore will trigger the turn-on threshold V TH2 .
At that point the IR1166 will drive the gate of MOSFET on which will in turn cause the conduction voltage V DS to drop down.
This drop is usually accompanied by some amount of ringing, that can trigger the input comparator to turn off; hence, a
Minimum On Time (MOT) blanking period is used that will maintain the power MOSFET on for a minimum amount of time.
The programmed MOT will limit also the minimum duty cycle of the SR MOSFET and, as a consequence, the max duty cycle
of the primary side switch.
DCM/CrCM Turn-off phase
Once the SR MOSFET has been turned on, it will remain on until the rectified current will decay to the level where V DS will
cross the turn-off threshold V TH1 . This will happen differently depending on the mode of operation.
In DCM the current will cross the threshold with a relatively low dI/dt. Once the threshold is crossed, the current will start
flowing again through the body diode, causing the V DS voltage to jump negative. Depending on the amount of residual current,
V DS may trigger once again the turn on threshold: for this reason V TH2 is blanked for a certain amount of time (T BLANK ) after
V TH1 has been triggered.
The blanking time is internally set. As soon as V DS crosses the positive threshold V TH3 also the blanking time is terminated and
the IC is ready for next conduction cycle.
12
www.irf.com
? 2013 International Rectifier
Nov 6, 2013
相关PDF资料 |
PDF描述 |
|---|---|
| FAN3224TMX | IC GATE DVR DUAL 4A 8-SOIC |
| T95X685K020HZSL | CAP TANT 6.8UF 20V 10% 2910 |
| T95X685K016HZSL | CAP TANT 6.8UF 16V 10% 2910 |
| HK1608R22J-T | INDUCTOR HI FREQ 220NH 5% 0603 |
| FAN3225CMPX | IC GATE DRIVER DUAL 4A 8-MLP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| IRAC11662-100W | 功能描述:电源管理IC开发工具 +16V Lw-Sd 100W Flybk Demo Brd RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| IRAC1168-DFET | 制造商:International Rectifier 功能描述:0V 999.000A LVIC OTHER - Rail/Tube |
| IRAC1168-PQFN | 制造商:International Rectifier 功能描述:DESIGN KIT - Rail/Tube |
| IRAC1168-SO8 | 制造商:International Rectifier 功能描述:0V 999.000A LVIC OTHER - Rail/Tube |
| IRAC1168-TO220 | 制造商:International Rectifier 功能描述:9999V 999.000A OTHER - Rail/Tube |
发布紧急采购，3分钟左右您将得到回复。