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The NCP1253 is a highly integrated PWM controller capable of delivering a rugged and high performance offline power supply in a tiny TSOP-6 package. With a supply range up to 28 V, the controller hosts a jittered 65 kHz or 100 kHz switching circuitry operated in peak current mode control. When the power on the secondary side starts to decrease, the controller automatically folds back it's switching frequency down to a minimum level of 26 kHz. As the power further goes down, the part enters skip cycle while limiting the peak current. To avoid sub harmonic oscillations in CCM operation, adjustable slope compensation is available via the series inclusion of a simple resistor in the current sense signal. Besides the auto-recovery timer-based short-circuit protection, an Over Voltage Protection on the Vcc pin protects the whole circuitry in case of optocoupler destruction or adverse open loop operation.
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fsw Typ (kHz)
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UVLO (V)
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Reference Price
NCP1253ASN100T1G
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
NCP1253ASN65T1G
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
NCP1253BSN100T1G
Active
Pb
A
H
P
TSOP-6
1
260
REEL
3000
Y
Flyback
Current Mode
100
Yes
8.8
Yes
No
Yes
28
300 / 500
$0.2036
More Details
NCP1253BSN65T1G
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
$0.1768
More Details
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可靠性数据
Die Related Summary Data
Device: NCP1253BSN100T1G
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.)