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UCC28086

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具有可编程斜率补偿、100µs 软启动、4.3/4.1 UVLO、温度范围为 -40°C 至 85°C 的电流模式推挽式 PWM

产品详情

Topology Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Current limiting, Multi-topology, Programmable slope compensation, Soft start UVLO thresholds on/off (V) 4.3/4.1 Operating temperature range (°C) -40 to 85 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 15
Topology Half bridge, Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Current limiting, Multi-topology, Programmable slope compensation, Soft start UVLO thresholds on/off (V) 4.3/4.1 Operating temperature range (°C) -40 to 85 Rating Catalog Gate drive (typ) (A) 1 Vin (max) (V) 15
SOIC (D) 8 29.4 mm² 4.9 x 6 TSSOP (PW) 8 19.2 mm² 3 x 6.4
  • Programmable Slope Compensation
  • Internal Soft-Start on the UCC38083/4
  • Cycle-by-Cycle Current Limiting
  • Low Start-Up Current of 120 µA and 1.5 mA Typical Run Current
  • Single External Component Oscillator Programmable from 50 kHz to 1 MHz
  • High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
  • Current Sense Discharge Transistor to Improve Dynamic Response
  • Internally Trimmed Bandgap Reference
  • Undervoltage Lockout with Hysteresis
  • APPLICATIONS
    • High-Efficiency Switch-Mode Power Supplies
    • Telecom dc-to-dc Converters
    • Point-of-Load or Point-of-Use Power Modules
    • Low-Cost Push-Pull and Half-Bridge Applications

  • Programmable Slope Compensation
  • Internal Soft-Start on the UCC38083/4
  • Cycle-by-Cycle Current Limiting
  • Low Start-Up Current of 120 µA and 1.5 mA Typical Run Current
  • Single External Component Oscillator Programmable from 50 kHz to 1 MHz
  • High-Current Totem-Pole Dual Output Stage Drives Push-Pull Configuration with 1-A Sink and 0.5-A Source Capability
  • Current Sense Discharge Transistor to Improve Dynamic Response
  • Internally Trimmed Bandgap Reference
  • Undervoltage Lockout with Hysteresis
  • APPLICATIONS
    • High-Efficiency Switch-Mode Power Supplies
    • Telecom dc-to-dc Converters
    • Point-of-Load or Point-of-Use Power Modules
    • Low-Cost Push-Pull and Half-Bridge Applications

The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.

The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error amplifier. The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function. This device also includes an internal discharge transistor from the CS pin to ground, which is activated at each clock cycle after the pulse is terminated. This discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

The UCC38083 and the UCC38084 devices have a typical soft-start interval time of 3.5 ms while the UCC38085 and the UCC38086 has less than 100 µs for applications where internal soft-start is not desired.

The UCC38083 and the UCC38085 devices have the turn on/off thresholds of the 12.5 V / 8.3 V, while the UCC38084 and the UCC38086 has the turn on/off thresholds of 4.3 V / 4.1 V. Each device is offered in 8-pin TSSOP (PW), 8-pin SOIC (D) and 8-pin PDIP (P) packages.

The UCC38083/4/5/6 is a family of BiCMOS pulse width modulation (PWM) controllers for dc-to-dc or off-line fixed-frequency current-mode switching power supplies. The dual output stages are configured for the push-pull topology. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 110 ns, limiting each output’s duty cycle to less than 50%.

The new UCC3808x family is based on the UCC3808A architecture. The major differences include the addition of a programmable slope compensation ramp to the CS signal and the removal of the error amplifier. The current flowing out of the ISET pin through an external resistor is monitored internally to set the magnitude of the slope compensation function. This device also includes an internal discharge transistor from the CS pin to ground, which is activated at each clock cycle after the pulse is terminated. This discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

The UCC38083 and the UCC38084 devices have a typical soft-start interval time of 3.5 ms while the UCC38085 and the UCC38086 has less than 100 µs for applications where internal soft-start is not desired.

The UCC38083 and the UCC38085 devices have the turn on/off thresholds of the 12.5 V / 8.3 V, while the UCC38084 and the UCC38086 has the turn on/off thresholds of 4.3 V / 4.1 V. Each device is offered in 8-pin TSSOP (PW), 8-pin SOIC (D) and 8-pin PDIP (P) packages.

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UCC2808A-2 正在供货 具有放电晶体管、4.3/4.1V UVLO、温度范围为 -40°C 至 85°C 的低功耗电流模式推挽式 PWM No programmable slope compensation

技术文档

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类型 标题 下载最新的英语版本 日期
* 数据表 8-Pin Current Mode Push-Pull PWM ControllersWith Programmable Slope Compensation 数据表 (Rev. E) 2009年 5月 12日
应用手册 How to Specify the Current Sense Resistor in a Converter using the UCC28083 (Rev. A) 2011年 7月 21日
应用手册 A New Synchronization Circuit for Power Converters (Rev. A) 2010年 4月 21日
应用手册 Current Doubler Rectifier Offers Ripple Current Cancellation 2004年 9月 21日

设计和开发

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参考设计

PMP12072 — 隔离式 24V 交流/直流固态继电器参考设计

此隔离式双向固态开关可控制流入直流负载和交流负载的电流。此开关的额定电压为 24VAC,可对高达约 1Arms/4Apeak 的负载进行开关操作。
测试报告: PDF
原理图: PDF
封装 引脚 下载
SOIC (D) 8 查看选项
TSSOP (PW) 8 查看选项

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  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
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  • 制造厂地点
  • 封装厂地点

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