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UCC3960的基本参数
  • 制造厂商:TI
  • 产品类别:电源管理
  • 技术类目:交流/直流和隔离式直流/直流开关稳压器 - PWM 控制器
  • 功能描述:温度范围为 0°C 至 70°C 的初级侧启动控制器
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UCC3960的产品详情:

The UCC3960 primary-side startup controller is a unique solution that provides all the primary-side functions required for a single-ended, isolated offline, switch-mode power converter that uses secondary-side PWM control. It is usable with a wide range of secondary circuits and is especially well suitable for systems where sophisticated handling of overload conditions is required.

Secondary-side control assumes that output voltage and current measurements are interfaced directly to an output ground-referenced PWM stage that develops the power switch command for the supply. This digital PWM command can then be transmitted to the primary-side power switch through a simple and low-cost isolating pulse transformer. With secondary-side control, it is much easier to monitor and control the system load with tightly coupled analog control loops. Load-oriented features such as output current sharing and synchronous rectification are implemented more easily.

The UCC3960 provides all the circuitry required on the primary side of a secondary-side controlled power supply. It features a free running 60-kHz to 360-kHz oscillator that is synchronizable to the secondary-side PWM signal and also has the ability to accept start/stop PWM commands from the isolating pulse edge transformer. The use of an extremely small and low-cost pulse transformer allows for higher converter bandwidth. This also eliminates the loop-gain variations due to initial accuracy and aging of an opto-coupler feedback element or the size penalty of a gate transformer. It also includes an undervoltage lockout circuit with 2-V hysteresis, a low current startup with active low during UVLO, a soft-start capability, a 5-V reference and a high current power output.

In a non-typical use, the UCC3960 can accommodate an analog feedback signal through an opto-isolator where it can operate in voltage-mode control mode with primary-side peak current limiting.

The UCC3960 and the UCC2960 are available in the 8-pin SOIC (D) and PDIP (P) packages. A 14-pin package version is available as UCC2961 and UCC3961 that includes additional protection features such as multimode overcurrent protection, volt-second clamp, programmable overvoltage and undervoltage sense lines, and the self-bias regulator.

UCC3960的优势和特性:
  • Operates With Secondary-Side PWM Control
  • Receives Isolated PWM Command Through a Pulse-Edge-Transformer
  • Initial Free-Running Soft-Start Up with Duty-Cycle Clamping
  • Up to 400-kHz Synchronizable Switching Frequency
  • High-Current FET Drive (1.5-A Sink, 0.75-A Source)
  • Overcurrent Protection
  • Undervoltage Lockout with 2-V Hysteresis
  • Low-Current Startup typical operating circuit
UCC3960的参数(英文):
  • Topology
  • Flyback, Boost,
  • Duty cycle (Max) (%)
  • 72
  • Supply voltage (Max) (V)
  • 19
  • UVLO thresholds on/off (V)
  • 10.0/8.0
  • Operating temperature range (C)
  • 0 to 70
  • Rating
  • Catalog
  • Frequency (Max) (kHz)
  • 400
  • Gate drive (Typ) (A)
  • 1.5
UCC3960具体的完整产品型号参数及价格(美元):

UCC3960的完整型号有:UCC3960D,以下是这些产品的关键参数及官网采购报价:

UCC3960D,工作温度:0 to 70,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-2-260C-1 YEAR,引脚镀层/焊球材料:NIPDAU,TI官网UCC3960D的批量USD价格:1.294(1000+)

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UCC3960的评估套件:

UCC3960D,工作温度:0 to 70,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-2-260C-1 YEAR,引脚镀层/焊球材料:NIPDAU,TI官网UCC3960D的批量USD价格:1.294(1000+)

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