- 您现在的位置：买卖IC网 > Datasheet目录345 > NCP1910GEVB (ON Semiconductor)BOARD DEMO NCP1910DEMO-B-TLS Datasheet资料下载
参数资料
| 型号： | NCP1910GEVB |
| 厂商： | ON Semiconductor |
| 文件页数： | 22/37页 |
| 文件大小： | 0K |
| 描述： | BOARD DEMO NCP1910DEMO-B-TLS |
| 设计资源： | NCP1910 Schematic NCP1910GEVB BOM |
| 标准包装： | 1 |
| 主要目的： | DC/DC，步降 |
| 输出及类型： | 1，非隔离 |
| 输出电压： | 最低可调至 0.8V |
| 电流 - 输出： | 3A |
| 输入电压： | 3 ~ 5.5 V |
| 稳压器拓扑结构： | 降压 |
| 频率 - 开关： | 1MHz |
| 板类型： | 完全填充 |
| 已供物品： | 板 |
| 已用 IC / 零件： | NCP1910 |
| 其它名称： | NCP1910GEVBOS |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页当前第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页
NCP1910
V M +
R M I CS V LBO 2
4 V CTRL * V CTRL min
PFC Duty
V M
11
I M
R M
C M
Modulation
Figure 45. The Multiplier Voltage Pin Configuration
The multiplier voltage V M is generated according to
Equation 8.
?
V CTRL is the control voltage signal, the output
voltage of Operational Trans ? conductance Amplifier
R M I CS V LBO
2
V M + (eq. 8)
4 V CTRL * V CTRL(min)
Where:
? R M is the external multiplier resistor connected to
V M pin, which is constant.
? V LBO is the input voltage signal appearing on the
LBO pin, which is proportional to the rms input
voltage,
? I CS is the sense current proportional to the inductor
current I L as described in Equation 13.
Line Brown ? Out Protection
V in
Ac line
(OTA), as described in Equation 17.
? V CTRL(min) is not only the minimum operating
voltage of V CTRL but also the offset voltage for the
PFC current modulation.
R M directly limits the maximum input power capability.
Also, due to the V in2 feed ? forward feature, where the V LBO
is squared, the transfer function and the power delivery is
independent from the ac line level. The relationship between
V CTRL and power delivery will be depicted later on.
EMI
Filter
C in
R LBOU
LBO
V LBOT
LBO comp.
V LBOcomp
PFC_BO
R SENSE
C LBO
R LBOL
S
L BO Q
t LBO(blank)
t LBO(window)
Vdd
V LBO(clamp)
R
reset
reset
reset
I LBOH
Figure 46. The Line Brown ? Out Configuration
As shown in Figure 46, the Line Brown ? Out pin
(represented LBO pin) as receives a portion of the input
voltage (V in ). As V in is a rectified sinusoid, a capacitor must
integrate the ac line ripple so that a voltage proportional to
the average value of V in is applied to the brown ? out pin.
The main function of the LBO block is to detect too low
input voltage conditions. A 7 m A current source lowers the
LBO pin voltage when a brown ? out condition is detected.
This is for hysteresis purpose as required by this function.
In nominal operation, the voltage applied to LBO pin must
be above the internal reference voltage, V LBOT (1 V
typically). In this case, the output of the LBO comparator
V LBOcomp is low.
http://onsemi.com
22
相关PDF资料 |
PDF描述 |
|---|---|
| NCP3418BMNR2G | IC MOSFET DRIVER DUAL 12V 10-DFN |
| NCP3418DR2 | IC MOSFET DRIVER DUAL 12V 8-SOIC |
| NCP3420DR2G | IC MOSFET DRIVER DUAL 12V 8-SOIC |
| NCP3488DR2G | IC MOSFET DRVR DUAL 12V 8-SOIC |
| NCP5007SNT1 | IC LED DRIVR WHT COMPACT 5TSOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1927DR2G | 功能描述:功率因数校正 IC PFC AND FLYBACK CONTROLER RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel |
| NCP1937A1DR2G | 制造商:ON Semiconductor 功能描述:COMBO PFC & QUAZI FLYBACK - Tape and Reel 制造商:ON Semiconductor 功能描述:REEL / COMBO PFC & QUAZI FLYBACK |
| NCP1937B1DR2G | 制造商:ON Semiconductor 功能描述:COMBO PFC & QUAZI FLYBACK - Tape and Reel |
| NCP1937BADAPGEVB | 制造商:ON Semiconductor 功能描述:ADPTR 90W PFC+QR<10MW - Bulk 制造商:ON Semiconductor 功能描述:BOARD EVAL FOR NCP1937 制造商:ON Semiconductor 功能描述:Power Management IC Development Tools 90 W Adapter PFC+QR 10 MW Eval Brd |
| NCP21WB333 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:for Surface Mounting Application |
发布紧急采购，3分钟左右您将得到回复。