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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状况

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

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937A2DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937A3DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8398

More Details

NCP1937B1DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8637

More Details

NCP1937B2DR2G

Loading...

Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

Price N/A

More Details

NCP1937B3DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

No

Yes

Yes

$0.8398

More Details

NCP1937C1DR2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

N

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

Price N/A

More Details

NCP1937C4DR2G

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Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

NCP1937C61DR2G

Loading...

Active

CAD Model

Pb

A

H

P

SOIC-20 NB

1

260

REEL

2500

Y

CRM

Variable

Current Mode

Flyback

Variable

30

0.5

Yes

Yes

Yes

Yes

$0.8637

More Details

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