Offline Controllers | NCP1288

控制器，固定频率，电流模式，用于反激转换器

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概览

NCP1288 是新一代的 NCP12xx 固定频率电流模式控制器，具有高电压启动电流源极，且可与上一代实现引脚对引脚兼容。由于结合了频率折回专属 Soft-Skip™ 模式，该控制器在轻负载条件下表现出良卓越的能效，同时保持极低的待机功耗。此 Soft-Skip 特性还大幅降低了噪声的风险，允许在箝位网络中使用不太昂贵的变压器和电容器。内部频率抖动、斜坡补偿和多功能锁存输入使得此控制器成为耐用性和部件成本为关键限制因素的转换器的绝佳备选。另外，该控制器还包括一个新型高电压电路，组合了启动电流源和欠电压/线路 OVP 检测器，能够感应来自整流交流线路或直流滤波大电压的输入电压。最后，由于其精心设计，关键参数的精确度在整个温度范围（-40°C 至 +125°C）内得以控制，实现了更简单的设计和更大安全性（如峰值电流限值的 ±5%，振荡器的 ±7%）。

  • Ac-dc Adapters for Notebooks, LCD, and Printers
  • Offline Battery Chargers
  • Consumer Electronic Power Supplies
  • Auxiliary/Housekeeping Power Supplies
  • Timer-Based Overload Protection with AutoRecovery (Option B) or Latched (Option A) Operation
  • High-Voltage Current Source with Built-in Brown-out and Line Overvoltage Protections
  • Fixed-Frequency Current-Mode Operation with Built-in Ramp Compensation
  • Frequency Jittering
  • Adjustable Overpower Compensation
  • Latch-off Input for Severe Fault Conditions, with Direct Connection of an NTC for Overtemperature Protection (OTP)
  • Protection Against Winding Short-Circuit
  • Frequency Foldback transitioning into Soft-Skip
  • 65 kHz Oscillator (100 kHz and 133 kHz Versions Available Upon Request)
  • VCC Operation up to 28 V
  • Increased Precision on Critical Parameters
  • ±1.0 A Peak Current Drive Capability
  • 4.0 ms Soft-Start
  • Internal Thermal Shutdown with Hysteresis
  • These Devices are Pb-Free, Halogen Free/BFR free and are ROHS compliant

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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

NCP1288BD65R2G

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Last Shipments

CAD Model

Pb

A

H

P

SOIC-7

751U

1

260

REEL

2500

N

Flyback

Current Mode

65

Yes

10

Yes

Yes

Yes

28

1000 / 1000

Price N/A

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