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NCP1251 是一款高度集成的 PWM 控制器,能够在极小型 TSOP-6 封装内提供耐用的高性能离线电源。该控制器供电范围高达 28 V,具有带抖动的 65 kHz 或 100 kHz 开关电路,在峰值电流模式控制下运行。当辅助侧功率开始降低时,该控制器将其开关频率自动折回至最低 26 kHz 的水平。当功率进一步下降时,该零部件进入跳过周期,同时对峰值电流进行限制。过功率保护 (OPP) 是一种非常困难的措施,尤其当无负载待机要求驱动转换器规格时更是如此。安森美半导体的专属集成 OPP 让您仅通过两个外部电阻即可充分利用提供的最高功率,而不会影响待机性能。在同一个引脚上组合了锁存的过电压保护 (OVP)。为了简化实施,自动恢复 OVP 还会监控 Vcc 线路。这些特性在光耦合器发生故障或逆开关运行时提供有效的保护。最后,基于计时器的短路保护提供了最佳保护方案,让您能够精确选择保护跳闸点,而不用考虑辅助绕组和电源绕组之间的松散耦合。
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Status
CAD Models
Compliance
Package Type
Case Outline
MSL Type
MSL Temp (°C)
Container Type
Container Qty.
ON Target
Topology
Control Mode
fsw Typ (kHz)
Stand-by Mode
UVLO (V)
Short Circuit Protection
Latch
Soft Start
VCC Max (V)
Drive Cap. (mA)
Reference Price
NCP1251ASN100T1G
Pb
A
H
P
TSOP-6
1
260
REEL
3000
N
Flyback
Current Mode
100
Yes
8.8
Yes
Yes
Yes
28
300 / 500
Price N/A
More Details
NCP1251ASN65T1G
Pb
A
H
P
TSOP-6
1
260
REEL
3000
N
Flyback
Current Mode
65
Yes
8.8
Yes
Yes
Yes
28
300 / 500
Price N/A
More Details
NCP1251BSN100T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
100
Yes
8.8
Yes
OVP
Yes
28
300 / 500
$0.276
More Details
NCP1251BSN65T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
65
Yes
8.8
Yes
OVP
Yes
28
300 / 500
$0.2382
More Details
NCP1251CSN65T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
65
Yes
8.8
Yes
NO
Yes
28
300 / 500
$0.1682
More Details
NCP1251FSN65T1G
Pb
A
H
P
TSOP-6
1
260
REEL
3000
N
Flyback
Current Mode
65
Yes
8.8
Yes
Yes
Yes
28
300 / 500
Price N/A
More Details
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可靠性数据
Die Related Summary Data
Device: NCP1251ASN100T1G
Equivalent to wafer fab process: ONC25
产品技术
产品技术
等效器件小时
平均故障间隔时间/平均无故障时间(按小时计算)
FITS
ONC25
1
2712519294
More Details
Re-calculate Data
Data is based on the following assumptions.
Note: The temperature and confidence level may be adjusted to your requirements.
Disclaimer: A reliability FIT rate calculated using this tool shall not be used for any functional safety purpose. In case a raw FIT rate needs to be estimated for a component which is targeted to be used in a safety critical application (i.e. compliant to ISO 26262 standard) it should be calculated according to generic safety standards (IEC62380, IEC61709, SN29500, FIDES, etc.)