Power Factor Controllers | NCP1937

功率因数校正和准谐振反激控制器组合

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概览

此组合集成电路将为适配器应用实施一个紧凑、高能效的开关模式电源所需的功率因数校正 (PFC) 和准谐振反激功能进行集成。该 PFC 级以最大频率箝位在临界导通模式 (CrM) 下运行时表现为接近一致的功率因数。 该电路结合了构建一个坚固紧凑的 PFC 级所需的所有必要功能，同时最大程度减少了外部组件的数量。该准谐振电流模式反激级具有一个专属的谷锁闭电路，可确保稳定的谷切换。 该系统可在低至第 4 谷运行，对于超过第 4 谷的最小频率箝位则切换到频率折回模式，消除了噪声。跳过模式运行可在轻型负载条件下实现卓越能效，同时具有极低的待机功耗。

  • Adapters
  • Combo PFC+QR

  • All-In-One (AIO) Computers
  • High Power Notebook Adapters

  • <10mW No Load Standby Performance
  • High Voltage Startup Circuit and Active Input Filter Capacitor Discharge Circuitry
  • High Voltage Line Voltage Detector
  • Integrated High Voltage Switch Disconnects PFC Feedback Resistor Divider
  • Fault Input for Severe Fault Conditions
  • Bi-Level Line-Dependent Output Voltage
  • Boost Diode Short-Circuit Protection
  • Adjustable PFC Disable Threshold Based on Output Power
  • Frequency Foldback with Minimum Frequency Clamp
  • Minimum Frequency Clamp
  • Valley Switching Operation with Valley-Lockout
  • PFC
  • QR Flyback Controller

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Product services, tools and other useful resources related to NCP1937

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状态

CAD Models

Compliance

Package Type

Case Outline

MSL Type

MSL Temp (°C)

Container Type

Container Qty.

ON Target

PFC Mode

Frequency Operation

Control Mode

Topology

fSW Typ (kHz)

VCC Max (V)

Drive Cap. (mA)

UVLO (V)

Latch

UVP

Inhibition

Reference Price

NCP1937A1DR2G

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937A2DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937A3DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

$0.8398

More Details

NCP1937B1DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

No

Yes

Yes

$0.8637

More Details

NCP1937B2DR2G

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

No

Yes

Yes

Price N/A

More Details

NCP1937B3DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

No

Yes

Yes

$0.8398

More Details

NCP1937B51DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

No

Yes

Yes

$0.8247

More Details

NCP1937C1DR2G

Contact Sales

Obsolete

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937C4DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937C61DR2G

Contact Sales

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

751BS

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

500 / 800

Yes

Yes

Yes

Yes

$0.8637

More Details

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可靠性数据

Die Related Summary Data

Device: NCP1937A2DR2G

Equivalent to wafer fab process: VHVIC

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

VHVIC

2

2577173853

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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