辅助侧控制器,同步整流,用于高能效 SMPS

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概览

NCP4303A/B 是一款全功能控制器和驱动器,专门为控制开关模式电源中的同步整流器电路而设计。由于其多功能性,可用于多种拓扑结构,如反激、正向和半桥谐振 LLC。外部可调最低开关时间组合有助于抵御 PCB 布局或其他寄生元件导致的振铃。因此保证了 SR 系统的可靠低噪音运行。极短关断延迟时间、驱动器的高接收电流功能以及自动封装寄生电感补偿系统可最大程度延长同步整流 MOSFET 导通时间,实现 SMPS 能效的进一步提高。最后,较宽的运行 VCC 范围结合两个版本的驱动器电压箝位,简化了 SR 系统在 24 V 输出应用中的实施。NCP4304 推荐用于新设计。 NCP4303 将继续生产。 NCP4304 的引入是为了增强使用触发器输入的 LLC 设计的性能。 其他性能和应用相同。

  • ATX power supplies
  • High Power AC/DC adapters
  • Flat TV power supplies

  • All-in-one PCs
  • Gaming Consoles
  • Notebook Adapters

  • Automatic parasitic inductance compensation input
  • 40 ns turn off delay from current sense input to driver output
  • Wide Vcc operating range up to 30 V
  • Externally adjustable minimum on and minimum off times
  • Trigger input for interfacing with primary side switching signal
  • Disable input for standby mode
  • 5 A / 2.5 A peak sink / source drive capability
  • True secondary ZCD with adjustable threshold
  • Gate drive clamp of either 12 V (A version) or 6 V (B version)
  • Maximum frequency of operation up to 500 kHz

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Vref Typ (V)

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Reference Price

NCP4303ADR2G

Active, Not Rec

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

30

12

0.0093

-40

125

$0.4267

More Details

NCP4303AMNTWG

CAD Model

Pb

A

H

P

DFN-8

1

260

REEL

4000

N

30

12

0.0093

-40

125

Price N/A

More Details

NCP4303BDR2G

CAD Model

Pb

A

H

P

SOIC-8

1

260

REEL

2500

N

30

6

0.0093

-40

125

Price N/A

More Details

NCP4303BMNTWG

CAD Model

Pb

A

H

P

DFN-8

1

260

REEL

4000

N

30

6

0.0093

-40

125

Price N/A

More Details

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