Offline Controllers | NCP1251

PWM 控制器，电流模式，用于离线电源

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概览

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。

  • Offline Adapters
  • AC-DC converters
  • 45W Adapter

  • Set-top Boxes
  • Printers
  • Notebooks and Netbooks

  • Non-dissipative internal and adjustable Over Power Protection (OPP)
  • Frequency Foldback down to 26 kHz and Skip-Cycle in light load conditions
  • Internal Ramp Compensation
  • Frequency jittering from full load to skip-cycle
  • Latch input for OVP and OTP implementations
  • Over Voltage Protection (OVP) monitoring on the Vcc pin
  • See NCP1250 for no Over Voltage Protection (OVP) on the Vcc pin

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产品:

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可订购器件:

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状态

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

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Obsolete

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

Flyback

Current Mode

100

Yes

8.8

Yes

Yes

Yes

28

300 / 500

Price N/A

More Details

NCP1251ASN65T1G

Contact Sales

Obsolete

相似产品推荐
CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

N

Flyback

Current Mode

65

Yes

8.8

Yes

Yes

Yes

28

300 / 500

Price N/A

More Details

NCP1251BSN100T1G

Contact Sales

Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

Y

Flyback

Current Mode

100

Yes

8.8

Yes

OVP

Yes

28

300 / 500

$0.276

More Details

NCP1251BSN65T1G

Contact Sales

Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

Y

Flyback

Current Mode

65

Yes

8.8

Yes

OVP

Yes

28

300 / 500

$0.2382

More Details

NCP1251CSN65T1G

Contact Sales

Active

CAD Model

Pb

A

H

P

TSOP-6

318G-02

1

260

REEL

3000

Y

Flyback

Current Mode

65

Yes

8.8

Yes

NO

Yes

28

300 / 500

$0.1682

More Details

NCP1251FSN65T1G

Contact Sales

Obsolete

相似产品推荐
CAD Model

Pb

A

H

P

TSOP-6

318G-02

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.)

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