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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)： | 1/18頁 |
| 文件大?。?/td> | 734K |
| 代理商： | SG6980DZ |
Product Specification
Single-Stage PFC Controller
FEATURES OVERVIEW
Innovative switching-charge multiplier divider
Multi-vector control for improved PFC output
transient response
1:1 Synchronous switching with SYNC
Average current mode control
Remote on/off control
Power-on sequence control
Programmable PFC output-voltage control
Cycle-by-cycle current limiting
Over-voltage and under-voltage protections
Brownout and open-loop protections
Low start-up and operating current
SG6980
System General Corp.
Version 1.0.1 (IAO33.0064.B0)
- 1 -
www.sg.com.tw www.fairchildsemi.com
September 17, 2007
APPLICATIONS
Active-PFC switching power supplies
TV and home appliances
Computer and telecom
DESCRIPTION
The highly integrated SG6980 is designed for power
supplies with boost power-factor-correction (PFC).
It requires very few external components to achieve
desirable operation and includes versatile protections /
compensation. It is available in 16-pin DIP and SOP
packages. The innovative switching-charge multiplier
divider enhances the PFC circuit’s noise immunity. The
proprietary multi-vector 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, SG6980 shuts off
to prevent extra-high voltage on output. The PFC gate
driver can be synchronized with external SYNC signal
and the switching noise can be reduced. During start-up,
the RDY (ready) is pulled low until the PFC output
voltage reaches the setting level. This signal can be used
to control the second forward stage for proper power-on
sequence. In addition, SG6980 provides complete
protection functions, such as brownout and RI open/short.
TYPICAL APPLICATION
SG6980
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