參數(shù)資料
型號(hào)： NCP1605DR2G
廠商： ON Semiconductor
文件頁(yè)數(shù)： 18/32頁(yè)
文件大?。?/td> 745K
描述： IC PFC CONTROLLER CCM/DCM 16SOIC
標(biāo)準(zhǔn)包裝： 1
系列： Soft-Skip™
模式： 臨界傳導(dǎo)（CRM），間歇導(dǎo)電（DCM）
頻率 - 開關(guān)： 250kHz
電流 - 啟動(dòng)： 12mA
電源電壓： 10 V ~ 20 V
工作溫度： 0°C ~ 125°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC
包裝： 標(biāo)準(zhǔn)包裝
其它名稱： NCP1605DR2GOSDKR
NCP1605, NCP1605A, NCP1605B
http://onsemi.com
18
NCP1605(A) Operation Modes
Like the NCP1601, the NCP1605:
" Features a current sense block that prevents the PFC
stage from operating in CCM: as long as the coil
current is not null, the power switch is not allowed to
turn on. Hence the circuit can only operate in either
Fixed Frequency DCM or CRM.
" Features the capability to exhibit nearunity power
factor while operating in any type of Discontinuous
Conduction Mode operation: DCM or CRM.
" Auto adapts: if there is some current flowing through
the coil when the clock occurs to initiate a new current
cycle, the PFC stage enters CRM. On the other hand,
if the clock occurs during deadtimes, one obtains a
fixed frequency operation DCM. Thanks to its special
oscillator/synchronization arrangement, the circuit
automatically enters the appropriate mode CRM or
DCM. It is worth noting that jumps between the CRM
and modes cause absolutely no degradation: the input
current keeps being properly shaped and there is no
discontinuity in the power transfer.
Given the deadtime presence, DCM needs a higher peak
inductor current compared to CRM for the same delivered
power. Hence, the coil is generally designed to have CRM
at the most stressful conditions while DCM limits the
switching frequency at lower load. The circuit can also
transition within an ac line cycle so that:
" CRM reduces the current stress around the sinusoid
top.
" DCM limits the frequency around the line zero
crossing.
This capability offers the best of each mode without the
drawbacks. The way the circuit modulates the MOSFET
ontime allows this facility.
Figure 52. DCM and CRM Operation Within a Sinusoid Cycle
The NCP1605(A) can jump from DCM to CRM within a sinusoid cycle (and vice versa)
without any discontinuity in the current shaping or the power transfer.
Inductor Current, I
L
Current
Time
DCM
Critical Mode
DCM
Input Current, I
in
NCP1605 Ontime Modulation
Lets study the ac line current absorbed by the PFC boost.
The initial inductor current of each switching cycle is
always zero. The coil current ramps up when the MOSFET
is on. The slope is (V
IN
/L) where L is the coil inductance.
At the end of the ontime (t1), the coil demagnetization
phase starts. The coil current ramps down until this
sequence ends when it reaches zero. The duration of this
phase is (t2). The system enters then the deadtime (t3) that
lasts until the next clock is generated.
One can show (refer to NCP1601 data sheet) that the ac
line current is given by:
I
in
+ V
in
t
1
(t
1
) t
2
)
2 T L
(eq. 1)
Where T = (t1 + t2 + t3) is the switching period and V
IN
 is
the ac line rectified voltage.
To the light of this equation, we immediately note that I
IN
is proportional to V
IN
 if [t1(t1 + t2)/T] is a constant.
相關(guān)PDF資料
PDF描述
NCP1606BDR2G IC POWER FACTOR CONTROLLER 8SOIC
NCP1607BDR2G IC PFC CONTROLLER CRM 8SOIC
NCP1611BDR2G IC PFC CTLR HE ENHANCED 8-SOIC
NCP1651DR2G IC PFC CONTROLLER CCM/DCM 16SOIC
NCP1654BD133R2G IC PFC CCM 133KHZ 8-SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCP1605FORWGEVB 功能描述:電源管理IC開發(fā)工具 NCP1605 152 W FORWARD EVB RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
NCP1605LCDTVGEVB 功能描述:BOARD EVAL NCP1605/1396 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:* 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:- 主要目的:電源管理，電池充電器 嵌入式:否 已用 IC / 零件:MAX8903A 主要屬性:1 芯鋰離子電池 次要屬性:狀態(tài) LED 已供物品:板
NCP1606ADR2G 功能描述:功率因數(shù)校正 IC PWR FCTR CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
NCP1606APG 功能描述:功率因數(shù)校正 IC LO CST PWR FCTR CONT RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
NCP1606BDR2G 功能描述:功率因數(shù)校正 IC PWR FCTR CONTROLLER RoHS:否 制造商:Fairchild Semiconductor 開關(guān)頻率:300 KHz 最大功率耗散: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Reel
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*