- 您現在的位置：買賣IC網 > Datasheet目錄38 > FAN9612MX (Fairchild Semiconductor)IC CTLR PFC DUAL BCM 16SOICN Datasheet資料下載
參數資料
| 型號： | FAN9612MX |
| 廠商： | Fairchild Semiconductor |
| 文件頁數： | 14/36頁 |
| 文件大小： | 1561K |
| 描述： | IC CTLR PFC DUAL BCM 16SOICN |
| 標準包裝： | 1 |
| 模式： | 臨界傳導（BCM） |
| 頻率 - 開關： | 16.5kHz ~ 525kHz |
| 電流 - 啟動： | 80µA |
| 電源電壓： | 9 V ~ 18 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 16-SOIC N |
| 包裝： | 標準包裝 |
| 其它名稱： | FAN9612MXFSDKR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁當前第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁
?2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN9612 " Rev. 1.1.7
14
Figure 20. Error Amplifier Compensation Circuitry
7. Output Voltage Feedback (FB)
The feedback pin receives the divided-down output
voltage of the converter. In regulation, the FB pin should
be 3 V, which is the reference used at the non-inverting
input of the error amplifier. Due to the g
M
type error
amplifier, the FB pin is always proportional to the output
voltage and can be used for over-voltage protection as
well. A non-latching over-voltage detection circuit
monitors the FB pin and prevents the boost MOSFETs
from turning on when the FB voltage exceeds 3.25 V.
Operation resumes automatically when the FB voltage
returns to its nominal 3 V level.
The open feedback detection circuit is also connected to
the FB pin. Since the output of the boost converter is
charged to the peak of the input AC voltage when power
is applied to the power supply, the detection circuit
monitors the presence of this voltage. If the FB pin is
below 0.5 V, which would indicate a missing feedback
divider (or wrong value causing dangerously-high
regulation voltage), the FAN9612 does not send out
gate drive signals to the boost transistors.
Figure 21. Output-Voltage Feedback Circuit
8. Secondary Output Voltage Sense (OVP)
A second-level latching over-voltage protection can be
implemented using the OVP pin of the controller. The
threshold of this circuit is set to 3.5 V. There are two
ways to program the secondary OVP.
Option 1, as shown in Figure 22, is to connect the OVP
pin to the FB pin. In addition to the standard non-
latching OVP (set at ~8%), this configuration provides a
second OVP protection (set at ~15%), which is latched.
In the case where redundant over-voltage protection is
preferred (also called double-OVP protection), a second
separate divider from the output voltage can be used, as
shown by Option 2 in Figure 22. In this case, the
latching OVP protection level can be independently
established below or above the non-latching OVP
threshold, which is based on the feedback voltage (at
the FB pin).
If latching OVP protection is not desired at all, the OVP
pin should be grounded (Option 3).
Figure 22. Secondary Over-Voltage Protection
Circuit
相關PDF資料 |
PDF描述 |
|---|---|
| FL6961MY | IC CTLR PFC SGL FLYBACK 8-SOIC |
| IR1150ISTRPBF | IC PFC CONTROLLER CCM 8-SOIC |
| IR1152STRPBF | IC PFC ONE CYCLE CONTROL 8SOIC |
| IR1153STRPBF | IC PFC ONE CYCLE CONTROL 8SOIC |
| IR1155STRPBF | IC PFC ONE CYCLE CONTROL 8SOIC |
相關代理商/技術參數 |
參數描述 |
|---|---|
| FAN9612Y FAN9613Y WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN9613_YAC3026B WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| FAN9621 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Interleaved Dual BCM PFC Controller |
| FAN-AC3 | 制造商:Cosel Usa Inc 功能描述:Optional Accessories, OP Series |
| FAN-AC3-F | 制造商:Cosel Usa Inc 功能描述:Optional Accessories, OP Series |
發布緊急采購，3分鐘左右您將得到回復。