Offline Controllers | NCP1377

控制器，空转准谐振电流模式

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概览

NCP1377 组合了真正的电流模式调制器和去磁化检测器，确保了任何负载/线路条件下的完全边界/临界导通模式，且具有最小的漏极电压开关（准谐振运行）。由于其内在的跳过周期功能，该控制器可在电源要求降至预先确定的水平后立即进入突发模式。因为这发生在低峰值电流处，所以不会听到噪声。对于 NCP1377，一个内部 8.0µs 计时器可防止空转频率超过 150 kHz CISPR-22 EMI 启动限值，而跳过调节功能则使得用户能够选择突发折回发生的频率。对于 NCP1377B, 内部计时器持续时间则降至 3.0µs，允许在更高频率下运行。变压器核芯重置检测使用专用引脚实现的辅助绕组完成，还能实现快速过电压保护 (OVP)。一旦检测到 OVP，该集成电路则会永久性锁存关断。1377 的采样时间为 4.5µs，B 版本的采样时间为 1.5µs。NCP1377 还具有有效保护电路，如果发生过电流情况，则会禁用输出脉冲，进入安全突发模式，尝试重启。一旦故障清除，器件自动恢复。最后，内部 1ms 软启动避免了传统的启动压力。

  • AC/DC adapters for notebooks etc.
  • Offline battery chargers
  • Consumer electronics (DVD players, set-top boxes, TVs, etc.)
  • Auxiliary power supplies (USB, appliances, TVs etc.)
  • Free-running borderline / critical mode quasi-resonant operation
  • Latched Over Voltage Protection
  • Auto-recovery short-circuit protection via UVLO crossover
  • External latch triggering, e.g. via over-temperature signal
  • Current-Mode with adjustable Skip-cycle capability
  • Internal 1ms soft-start
  • Internal temperature shutdown
  • Internal Leading Edge Blanking
  • 500mA peak current source/sink capability
  • Under Voltage Lockout level of 12.5V (on) and 7.5V (min)
  • Direct optocoupler connection
  • SPICE models available for TRANsient analysis
  • Internal minimum TOFF
  • Auxiliary power supplies (USB, appliances, TVs etc.)
  • Pb-Free Packages are Available

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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

NCP1377BD1R2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

NCP1377BDR2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

NCP1377BPG

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Obsolete

CAD Model

Pb

A

H

P

PDIP-8

626B

NA

0

TUBE

50

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

NCP1377D1R2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

NCP1377DR2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-8

751-07

1

260

REEL

2500

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

NCP1377PG

Loading...

Obsolete

CAD Model

Pb

A

H

P

PDIP-8

626B

NA

0

TUBE

50

N

Flyback

Current Mode

Variable

Yes

Yes

No

Yes

Yes

16

500 / 500

Price N/A

More Details

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