參數(shù)資料
型號(hào)： NCP1603D100R2G
廠商： ON Semiconductor
文件頁數(shù)： 25/30頁
文件大?。?/td> 302K
描述： IC CTLR PFC/PWM COMBO 16-SOIC
產(chǎn)品變化通告： Product Discontinuation 21/Jun/2007
標(biāo)準(zhǔn)包裝： 2,500
模式： 臨界傳導(dǎo)（CRM），間歇導(dǎo)電（DCM）
頻率 - 開關(guān)： 58kHz
電流 - 啟動(dòng)： 17µA
電源電壓： 9 V ~ 18 V
工作溫度： -40°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： 帶卷 (TR)
NCP1603
http://onsemi.com
25
It is obvious that the I
L(ZCD)
 is not always zero. In order
to make it reasonably close to zero, the setting of R
S1
 and
R
CS1
 are crucial.
Figure 65. CS Pin Characteristic when I
L
 = 0
I
S(ZCD)
V
S(ZCD)
R
S1
 > R
S(ZCD)
R
S1
 = R
S(ZCD)
V
S
Operating ZCD point
Ideal ZCD point
I
S
Based on the CS pin (Pin 4) characteristics in Figure 35,
Figure 65 is studied here. When the inductor current is
exactly zero (i.e., I
L(ZCD)
 = 0), the ideal ZCD point in the
Figure 65 is reached where R
S1
 is R
S(ZCD)
 (536 W typical).
Considering the tolerance, the actual sense resistor R
S1
 is
needed to be higher than the ideal value of R
S(ZCD)
 to
ensure that zero current signal is generated when sense
current is smaller than the ZCD threshold (i.e., I
S
  <
I
S(ZCD)
). That is,
R
S
u R
S(ZCD)
+
V
S(ZCD)
I
S(ZCD)
(eq. 22)
The higher value of R
S1
  makes the bigger distance
between the operating and ideal ZCD points in Figure 65.
Hence, R
S1
 has to be as low value as possible. The best
recommended value of R
S1
 is therefore the maximum of
R
S(ZCD)
 that is 1.0 kW.
Now that the R
S1
 is set at a particular value that is greater
than R
S(ZCD)
. From Equation 20, the operating lines in
Equation 23 with different   inductor   currents   I
L
  of
Equation 20 are studied.
V
S
+ R
S1
I
S
* R
CS1
I
L
(eq. 23)
These operating lines are added in Figure 65 to formulate
Figure 66. When the inductor current I
L
 is smaller than
I
L(ZCD)
, the sense current I
S
 is smaller than I
S(ZCD)
 and
hence the zero current signal is generated.
Figure 66. CS Pin Characteristic with Different
Inductor Current
I
S(ZCD)
V
S(ZCD)
V
S
Operating
ZCD point
I
S
Best
ZCD
point
I
L
 = I
L(ZCD)
I
L
 > I
L(ZCD)
I
L
 = 0
It is noted in Figure 66 and Equation 23 that when the
(R
CS1
 I
L
) term is smaller the error or distance between the
lines to the line I
L
 = 0 is smaller. Therefore, the value of the
current sense resistor R
CS1
 is also recommended to be as
small as possible to minimize the error in the zero current
detection.
Overcurrent Protection (OCP) in PFC Section
Overcurrent protection is reached when I
S
 is larger than
I
S(OCP)
 (200 mA typical). The offset voltage of the CS pin
is V
S(OCP)
 (3.2 mV typical) in this condition. That is:
I
L(OCP)
+
R
S1
I
S(OCP)
* V
S(OCP)
R
CS1
(eq. 24)
When overcurrent protection threshold is reached, the
Drive Output of the device goes low.
Oscillator/Synchronization Block in PFC Section
Figure 67. Oscillator / Synchronization Block
in PFC Section
Oscillator Clock
S
R
Q
Zero Current
Turn on
MOSFET

+
5 V/3.5 V
Osc
delay
0
5
1
45 mA
94 mA
&
相關(guān)PDF資料
PDF描述
NCP1605DR2G IC PFC CONTROLLER CCM/DCM 16SOIC
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
NCP1605ADR2G 功能描述:功率因數(shù)校正 IC ENHANCED PFC CNTRLER 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
NCP1605BDR2G 功能描述:功率因數(shù)校正 IC High Volt Stby Mode Power Fact Corr 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
NCP1605DR2G 功能描述:功率因數(shù)校正 IC Enhanced PFC HV and Eff Standby 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
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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。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。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

我的聯(lián)系方式

*
*
*