- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄382500 > SG6980DZ (FAIRCHILD SEMICONDUCTOR CORP) Single-Stage PFC Controller PDF資料下載
參數(shù)資料
| 型號： | SG6980DZ |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single-Stage PFC Controller |
| 中文描述： | POWER FACTOR CONTROLLER, 68 kHz SWITCHING FREQ-MAX, PDIP16 |
| 封裝： | LEAD FREE, PLASTIC, DIP-16 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 734K |
| 代理商： | SG6980DZ |
Product Specification
Single-Stage PFC Controller
SG6980
System General Corp.
Version 1.0.1 (IAO33.0064.B0)
- 13 -
www.sg.com.tw www.fairchildsemi.com
September 17, 2007
EA
0
1
C
R
2
1
f
×
×
π
=
----------------------------
(6)
The average total input power can be expressed as:
EA
2
RMS
V
EA
AC
RMS
V
2
RMS
Vin
EA
AC
V
RMS
V
MO
I
RMS
V
V
V
R
V
I
)
rms
(
Iin
)
rms
(
Vin
Pin
∝
∝
×
×
∝
×
×
∝
×
×
=
From Equation 7, V
EA
, the output of the voltage error
amplifier, controls the total input power and the power
delivered to the load.
Multi-Vector Error Amplifier
The voltage-loop error amplifier of SG6980 is
transconductance, which has high output impedance
(> 90k
Ω
). A capacitor C
EA
(1μF ~ 10μF) connected from
VEA to ground provides a dominant pole for the voltage
loop. Although the PFC stage has a low bandwidth
voltage loop for better input power factor, the innovative
multi-vector error amplifier provides a fast transient
response to clamp the overshoot and undershoot of the
PFC output voltage. Figure 5 shows the voltage loop with
multi-vector for fast transient error amplifier. When the
variation of the feedback voltage exceeds
±
5% of the
reference voltage, the transconductance error amplifier
adjusts its output impedance to increase the loop response.
If the feedback resistance is opened, SG6980 shuts
off immediately to prevent extra-high voltage on the
output capacitor.
FIG. 5 Voltage Error Amplifier with Multi-Vector
Cycle-by-Cycle Current Limiting
SG6980 provides cycle-by-cycle current limiting for PFC
stages. Figure 6 shows the peak current limit for the PFC
stage. The PFC gate drive is terminated once the voltage
on IPK pin goes below V
PK
.
The voltage of V
RMS
determines the voltage of V
PK
. The
relationship between V
PK
and V
RMS
is shown in Figure 6.
The amplitude of the constant current I
P
is determined by
the internal current reference I
T
, according to the equation:
I
R
1.2V
2
T
I
2
=
Ip
×
=
×
-----------------------
(8)
Therefore the peak current of the I
S
is given by:
S
P
S_peak
R
pk
V
-
R
(Ip
I
×
=
------------------
(9)
FIG.6 Current Limit
Gate Drivers
SG6980 output stages are fast totem-pole gate drivers.
The output driver is clamped by an internal 18V Zener
diode to protect the power MOSFET.
Over-Temperature Protection
SG6980 provides an OTP pin for over-temperature
protection. A constant current is output from this pin. If RI
is equal to 24k
, the magnitude of the constant current is
50μA. An external NTC thermistor must be connected
from this pin to ground. When the OTP voltage drops
below 1.2V, SG6980 shuts down. SG6980 auto restarts
when the OTP voltage is higher than 1.4V.
--------------
(7)
相關PDF資料 |
PDF描述 |
|---|---|
| SG6980SZ | Single-Stage PFC Controller |
| SG6980 | Single-Stage PFC Controller |
| SGF15N60RUFD | Short Circuit Rated IGBT |
| SGF15N90D | General Description |
| SGF23N60UFD | 240 x 320 pixel format (Portrait Mode), CFL Backlight available with power harness |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SG6980SZ | 功能描述:開關變換器、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 開關頻率:1 MHz 工作溫度范圍: 安裝風格: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 |
| SG6S009V1A1R400 | 功能描述:CONN SD CARD 9POS TOP MNT SMD RoHS:是 類別:連接器，互連式 >> 存儲器 - PC 卡 - 連接器 系列:SG6 標準包裝:1,000 系列:PX10 卡類型:PCMCIA - ExpressCard? 位置數(shù):26 連接器類型:連接器 插入，移除方法:推入式，拉出式 彈出器側:- 安裝類型:表面貼裝，直角 特點:板導軌 板上方高度:0.157"（4.00mm） 安裝特點:正常，標準 - 頂部 包裝:帶卷 (TR) 觸點表面涂層:金 觸點涂層厚度:4µin（0.10µm） 其它名稱:670-2333-2PX10BSB00 |
| SG7 | 制造商:Ametherm Inc 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。