收藏本站
NCP1631
Internal
Thermal
Shutdown
TSD
Stdwn
Vref
VDD
Iref
Regul
Vcc
UVP
BO_NOK
UVLO
Vcc_OK
Rt(open)
Q
R
12 V / 10 V
S
30 ? m s
blanking
time
IRt_Low
(Ipin3 < 7 m A)
OF F
Fault
management
Figure 20. Fault Management Block
When any of the following faults is detected:
? brown ? out (“BO_NOK”)
? Under ? Voltage Protection (“UVP”)
? Latch ? off condition (“Stdwn”)
? Die over ? temperature (“TSD”)
? Too low current sourced by the R t pin (“R t(open) ”)
? “UVLO” (improper Vcc level for operation)
The circuit turns off. In this mode, the controller stops
operating. The major part of the circuit sleeps and its
consumption is minimized (< 500 m A). More specifically,
when the circuit is in OFF state:
? The two drive outputs are kept low
? The 7 ? m A current source of the brown ? out block is
enabled to set the proper start ? up BO threshold if Vcc
is high enough for proper operation. If not, the
brown-out pin is pulled down by a pnp transistor for a
? The pin5 capacitor (V control ) is discharged and kept
grounded along the OFF time, to initialize it for the
next operating sequence, where it must be slowly and
gradually charged to offer some soft ? start.
? The “pfcOK” pin is grounded.
? The output of the “V TON processing block” is
grounded
When the circuit recovers after a fault, the first watchdog
time is around 20 m s instead of 200 m s to allow a faster
re ? start.
In OFF mode at startup, the consumption is very low (<
50 m A). The brown ? out block is initialized not to allow
operation (“BO_NOK” high) by default. The PNP clamp is
active and maintains the BO pin level below 1 V. The 7 ? m A
current source is enabled only when V CC reaches V CC(on)
threshold.
proper input voltage sensing when the circuit recovers
operation (see brown-out section).
http://onsemi.com
21
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
NCP1650EVB BOARD EVAL NCP1650 PFC CTLR
NCP1652L48VGEVB BOARD EVAL 100W 48V NCP1652 PFC
NCP1653EVB BOARD EVAL FOR NCP1653
NCP2993FCT2GEVB BOARD EVAL NCP2993 AUDIO PWR AMP
NCP345SNT1G IC DETECTOR OVER VOLTAGE 5TSOP
NCP346SN2T1G IC DETECTOR OVER VOLTAGE 5TSOP
NCP347MTAITBG IC OVERVOLTAGE PROT CTRLR 10WDFN
NCP348AEMUTBG IC MOSFET DRIVER DUAL 12V 10LLGA
相关代理商/技术参数
NCP1650DR2 功能描述:功率因数校正 IC Fixed Frequency PFC 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
NCP1650DR2G 功能描述:功率因数校正 IC Fixed Frequency PFC PWM 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
NCP1650EVB 功能描述:电源管理IC开发工具 EVALUATION BOARD RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V
NCP1651DR2 功能描述:功率因数校正 IC Single Stage PFC 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
NCP1651DR2G 功能描述:功率因数校正 IC Single Stage PFC 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
NCP1652ADR2G 功能描述:功率因数校正 IC ANA PFC CONTROLLER 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
NCP1652DR2G 功能描述:功率因数校正 IC ANA PFC CONTROLLER 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
NCP1652DWR2G 功能描述:功率因数校正 IC ANA PFC CONTROLLER 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