參數(shù)資料
型號(hào)： R2A20111DD
廠商： Renesas Technology Corp.
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： Power Factor Correction Controller IC
中文描述： 功率因數(shù)校正控制芯片
文件頁(yè)數(shù)： 1/41頁(yè)
文件大?。?/td> 310K
代理商： R2A20111DD
REJ03F0231-0100 Rev.1.00 Mar 28, 2007
Page 1 of 40
R2A20111SP/DD
Power Factor Correction Controller IC
REJ03F0231-0100
Rev.1.00
Mar 28, 2007
Description
The R2A20111 is a power-factor correction (PFC) controller IC.
This IC adopts continuous conduction mode as PFC operation.
Various functions such as constant power limit, overvoltage detection, overcurrent detection, soft start, feedback-loop
disconnection detection, and holding function of PFC operation through momentary outage (PFC hold function) are
incorporated in a single chip. These functions reduce external circuitry.
The constant power limit function allows to eliminate a significant amount of coil noise which is generated due to
overcurrent detection operation in case of conventional overload.
The PFC hold function enables quick recovery by continuing PFC operation after momentary outage. The hold time
can be adjusted by an external capacitance.
Overcurrent detection pin is separately provided.
Latch mode shutdown function is incorporated.
A soft-start control pin provides for the easy adjustment of soft-start operation, and can be used to prevent overshooting
of the output voltage.
Features
Maximum ratings
Power-supply voltage Vcc: 24 V
Operating junction temperature Tjopr: – 40 to 125°C
Electrical characteristics
VREF output voltage VREF: 5.0 V ± 3%
UVLO operation start voltage VH: 10.5 ± 0.9 V
UVLO operation stop voltage VL: 9.0 ± 0.7 V
PFC output maximum ON duty Dmax-out: 95% (typ.)
Functions
Constant power limit function
Continuous conduction mode
Hold function of PFC operation on momentary outage (PFC hold function)
Overvoltage detection
Overcurrent detection
Soft start
Feedback loop disconnection detection
IC shutdown function
Package lineup: SOP-16 and DILP-16
Applications
Flat panel display
Projector
Desktop PC
White goods
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