- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382501 > SG6980 (Fairchild Semiconductor Corporation) Single-Stage PFC Controller PDF資料下載
參數(shù)資料
| 型號(hào)： | SG6980 |
| 廠商： | Fairchild Semiconductor Corporation |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Single-Stage PFC Controller |
| 中文描述： | 單級(jí)PFC控制器 |
| 文件頁(yè)數(shù)： | 11/18頁(yè) |
| 文件大小： | 734K |
| 代理商： | SG6980 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)
Product Specification
Single-Stage PFC Controller
OPERATION DESCRIPTION
SG6980
System General Corp.
Version 1.0.1 (IAO33.0064.B0)
- 11 -
www.sg.com.tw www.fairchildsemi.com
September 17, 2007
The highly integrated SG6980 is designed for a power
supply with boost PFC. It requires very few external
components to achieve high performance and includes
versatile protections / compensation.
The PFC function is implemented by average current
mode
control.
The
patented
multiplier-divider provides a high-degree of noise
immunity for the PFC circuit. This enables the PFC circuit
to operate over a much wider region. The proprietary
multi-vector output voltage control scheme provides a fast
transient response in a low-bandwidth PFC loop, in which
the overshoot and undershoot of the PFC voltage are
clamped. If the feedback loop is broken, the SG6980 shuts
off PFC to prevent extra-high voltage on output.
Programmable two-level high/low line compensation
optimizes THD performance.
switching-charge
In addition, SG6980 provides complete protection
functions, such as brownout and RI open/short.
Switching Frequency and Current
Sources
The switching frequency of SG6980 can be programmed
by the resistor R
I
connected between RI pin and GND.
The relationship is:
)
(
kHz
)
(k
I
R
1560
f
PWM
Ω
=
-------------
(1)
For example, a 24k
resistor R
I
results in a 65kHz
switching frequency. Accordingly, constant current I
T
flows through R
I
.
)
(
mA
)
(k
I
R
1.2V
T
I
Ω
=
----------------
(2)
I
T
is used to generate internal current reference.
If there is a SYNC signal input, the switching frequency is
defined by the SYNC signal. The SNYC frequency must
be larger than the programmed switching frequency,
less 6KHz.
Line Voltage Detection (V
RMS
)
Figure 1 shows a resistive divider with low-pass filtering
for line-voltage detection on the VRMS pin. The V
RMS
voltage is used for the PFC multiplier, brownout
protection, and RDY control.
For brownout protection, the SG6980 is disabled with
195ms delay time if the voltage V
RMS
drops below 0.8V.
For PFC multiplier and RDY control, please refer to
below sections for more detail.
FIG.1
PFC Output Voltage Control
For a universal input (90VAC ~ 264VAC) power supply
applying active boost PFC and forward as a second stage,
the output voltage of PFC is usually designed around 400V.
V
R
R
R
Vo
B
B
A
3
×
+
=
----
(3)
FIG.2 Output Voltage Setting
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SGF15N60RUFD | Short Circuit Rated IGBT |
| SGF15N90D | General Description |
| SGF23N60UFD | 240 x 320 pixel format (Portrait Mode), CFL Backlight available with power harness |
| SGF23N60UF | CONNECTOR ACCESSORY |
| SGF30N60RUFD | CO-PAK IGBT(CO-PAK絕緣柵雙極晶體管(IGBT)) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SG6980DDZ | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Single Stage PFC Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SG6980DZ | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Single Stage PFC Controller RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SG6980SZ | 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Single Stage PFC RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| SG6BA9A | 制造商:APEM 功能描述:BA9S 6VAC/DC GREEN LED 制造商:APEM COMPONENTS 功能描述:BA9S 6VAC/DC GREEN LED |
| SG6N60UFPWD | 功能描述:IGBT 晶體管 RoHS:否 制造商:Fairchild Semiconductor 配置: 集電極—發(fā)射極最大電壓 VCEO:650 V 集電極—射極飽和電壓:2.3 V 柵極/發(fā)射極最大電壓:20 V 在25 C的連續(xù)集電極電流:150 A 柵極—射極漏泄電流:400 nA 功率耗散:187 W 最大工作溫度: 封裝 / 箱體:TO-247 封裝:Tube |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。