- 您現(xiàn)在的位置：買賣IC網(wǎng) > Datasheet目錄38 > FAN6982MY (Fairchild Semiconductor)IC CTLR PFC CCM 14-SOICN Datasheet資料下載
參數(shù)資料
| 型號： | FAN6982MY |
| 廠商： | Fairchild Semiconductor |
| 文件頁數(shù)： | 13/16頁 |
| 文件大小： | 547K |
| 描述： | IC CTLR PFC CCM 14-SOICN |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 模式： | 連續(xù)導(dǎo)電（CCM） |
| 頻率 - 開關(guān)： | 50kHz ~ 75kHz |
| 電流 - 啟動： | 30µA |
| 電源電壓： | 11 V ~ 22 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC N |
| 包裝： | 帶卷 (TR) |
?2009 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN6982 " Rev. 1.0.3
13
The rectified sinusoidal signal is obtained by the current
flowing into the IAC pin. The resistor R
IAC
should be
large enough to prevent saturation of the gain
modulator as:
.
2
159
?/DIV>
<
MAX
LINE BO
IAC
V
G
A
R
(3)
where V
LINE.BO
is the line voltage that trips brownout
protection, G
MAX
is the maximum modulator gain when
VRMS is 1.08V, and 159礎(chǔ) is the maximum output
current of the gain modulator.
Current-Control of Boost Stage
As shown in Figure 27 the FAN6982 employs two
control loops for power factor correction, a current-
control loop and a voltage-control loop. The current-
control loop shapes inductor current, as shown in
Figure 28, based on the reference signal obtained at
IAC pin as:
1
L
CS
MO
M
AC
M
R
I R I G R
?/DIV>
=
?nbsp = ?nbsp ?/DIV>
(4)
ISENSE
IAC
VRMS
VEA
IEA
RM
R
M
RRMS1
RRMS2
R
RMS3
C
RMS1
C
RMS2
R
IAC
I
AC
V
IN
IL
R
CS1
R
F1
CF1
IMO
R
IC
C
IC1
CIC2
+
-
Drive
logic
OPFC
2.5V
RVC
C
VC1
C
VC2
FBPFC
R
FB1
RFB2
V
O
VREF
RT/CT
Figure 27. Gain Modulation Block
I
AC
I
L
1
M
MO
CS
R
I
R
Figure 28. Inductor Current Shaping
The current-control feedback loop also has a pulse-by-
pulse current limit comparator that forces the PFC
switch to turn off if the ISENSE pin voltage drops below
-1.15V until the next switching cycle.
Voltage-Control of Boost Stage
The voltage-control loop regulates PFC output voltage
using internal error amplifier such that the FBPFC
voltage is same as internal reference of 2.5V.
To improve system efficiency at low AC line voltage
and light-load condition, FAN6982 provides adjustable
PFC output voltage. As shown in Figure 29, FAN6982
monitors V
EA
and V
RMS
to adjust the PFC output
voltage. When V
EA
and V
RMS
are lower than thresholds,
internal current source of 20礎(chǔ) is enabled that flows
through R
FB2
, increasing the voltage of the FBPFC pin.
This causes the PFC output voltage to reduce when
20礎(chǔ) is enabled as:
1
2
2
2
2
(2 5 20
)
+
=
?/DIV>
?/DIV>
FB
FB
OPFC
FB
FB
R
R
V
. - 糀 R
R
(5)
Figure 29. Block of Adjustable PFC Output
Brownout Protection
FAN6982 has a built-in internal brownout protection
comparator monitoring the voltage of the VRMS pin.
Once the VRMS pin voltage is lower than 1.05V, the
PFC stage is shutdown to protect the system from over
current. FAN6982 starts up the boost stage once the
VRMS voltage increases above 1.9V.
TriFault Detect"
To improve power supply reliability, reduce system
component count, and simplify compliance to UL 1950
safety standards; the FAN6982 includes TriFault Detect
technology. This feature monitors FBPFC for certain
PFC fault conditions.
In the case of a feedback path failure, the output of the
PFC could exceed operating limits. Should FBPFC go
too low, or too high, or open; TriFault Detect senses the
error and terminates the PFC output drive.
TriFault detect is an entirely internal circuit. It requires
no external components to serve its protective function.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| FAN7527BN | IC PFC CTRLR TRANSITION 8DIP |
| FAN7529MX | IC PFC CTRLR CRM/TRANSITION 8SOP |
| FAN7930BM | IC PFC CTLR CRITICAL CONF 8-SOIC |
| FAN7930CM | IC PFC CTLR CRITICAL CONF 8-SOIC |
| FAN9611MX | IC PFC CTLR DUAL BCM 16-SOIC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| FAN7000 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Low Power Amplifier |
| FAN7000D | 功能描述:音頻放大器 Stero Power amp Headphone RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| FAN7000DTF | 功能描述:音頻放大器 Stero Power amp Headphone RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| FAN7005 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:200mW Stereo Power Amplifier with Shutdown |
| FAN7005M | 功能描述:音頻放大器 200mW Power amp Stereo RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。