UCC2808A-1

具有放电晶体管、12.5/8.3V UVLO、温度范围为 -40°C 至 85°C 的低功耗电流模式推挽式 PWM; • 采用推挽配置的双路输出驱动级\n• 采用了用于改善动态响应的电流检测放电晶体管\n• 130µA 典型启动电流\n• 1mA 典型运行电流\n• 工作频率至 1MHz\n• 内部软启动\n• 增益带宽积为 2MHz 的片上误差放大器\n• 片上 VDD 钳位\n• 能够提供 500mA 峰值拉电流和 1A 峰值灌电流的输出驱动级;

UCCx808A 器件是一系列 BiCMOS 推挽式高速低功耗脉宽调制器。UCCx808A 包含离线或直流/直流固定频率电流模式开关电源所需的全部控制和驱动电路，同时最大限度减少了外部器件数。\n\nUCCx808A 双路输出驱动级以推挽配置方式排列。两个输出均利用一个切换触发器在振荡器频率的一半处进行切换。两个输出间的死区时间通常为 60ns 至 200ns，具体取决于计时电容器和电阻器的值，因此可将每个输出级占空比的值限制为小于 50%。\n\nUCCx808A 系列提供各种封装选项和温度范围选项，并支持选择欠压锁定电平。此系列器件具有适用于离线和电池供电系统的 UVLO 阈值和磁滞选项。\n\nUCCx808A 是 UCC3808 系列的增强版本。两者之间的最大差异在于，A 版本在 CS 引脚与地之间采用一个内部放电晶体管，该晶体管在振荡器死区时间期间的每个时钟周期内都保持激活状态。此特性会在每个周期期间对 CS 引脚上的任何滤波电容进行放电，这有助于最大限度减小滤波电容器的值并缩短电流检测延时。

UCC2808A-1

LOW POWER CURRENT MODE PUSH-PULL PWM

UCC2808A-1

LOW POWER CURRENT MODE PUSH-PULL PWM

UCC2808A-1EP

增强型产品低功率电流模式推挽 PWM; • Controlled Baseline \n - One Assembly/Test Site, One Fabrication Site\n• Extended Temperature Performance of –40°C to 125°C\n• Enhanced Diminishing Manufacturing Sources (DMS) Support\n• Enhanced Product-Change Notification\n• Qualification Pedigree†• Dual Output Drive Stages in Push-Pull Configuration\n• Current Sense Discharge Transistor to Improve Dynamic Response• 130-µA Typical Starting Current• 1-mA Typical Run Current• Operation to 1 MHz\n• Internal Soft Start• On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product• On Chip VDD Clamping\n• Output Drive Stages Capable of 500-mA Peak-Source Current, 1-A Peak-Sink Current\n† Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as justifying use of this component beyond specified performance and environmental limits.;

The UCC2808A is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A contains all of the control and drive circuitry required for off-line or dc-to-dc fixed frequency current-mode switching power supplies with minimal external parts count.\n The UCC2808A dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than 50%.\n The UCC2808A family offers a variety of package options and choice of undervoltage lockout levels. The family has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown in the ordering information table.\n The UCC2808A is an enhanced version of the UCC2808 family. The significant difference is that the A versions feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.\n \n

UCC2808A-1EP

LOW POWER CURRENT MODE PUSH-PULL PWM

ControlledBaseline −OneAssembly/TestSite,OneFabrication Site ExtendedTemperaturePerformanceof −40°Cto125°C EnhancedDiminishingManufacturing Sources(DMS)Support EnhancedProduct-ChangeNotification QualificationPedigree† DualOutputDriveStagesinPush-Pull Configuration

UCC2808A-1Q1

汽车类 8.3V 至 15V、1A 推挽式电流模式 PWM 控制器; • Qualified for Automotive Applications\n• ESD Protection Exceeds 1500 V Per MIL-STD-883, Method 3015; Exceeds 200 V Using Machine Model (C = 200 pF, R = 0)\n• Dual Output Drive Stages in Push-Pull Configuration\n• Current Sense Discharge Transistor to Improve Dynamic Response\n• 130-µA Typical Starting Current\n• 1-mA Typical Run Current\n• Operation to 1 MHz\n• Internal Soft Start\n• On-Chip Error Amplifier With 2-MHz Gain Bandwidth Product\n• On Chip VDD Clamping\n• Output Drive Stages Capable of 500-mA Peak-Source Current, 1-A Peak-Sink Current;

The UCC2808A-xQ1 is a family of BiCMOS push-pull, high-speed, low-power, pulse-width modulators. The UCC2808A-xQ1 contains all of the control and drive circuitry required for off-line or DC-to-DC fixed frequency current-mode switching power supplies with minimal external parts count.The UCC2808A-xQ1 dual output drive stages are arranged in a push-pull configuration. Both outputs switch at half the oscillator frequency using a toggle flip-flop. The dead time between the two outputs is typically 60 ns to 200 ns depending on the values of the timing capacitor and resistors, thus limiting each output stage duty cycle to less than 50%.The UCC2808A-xQ1 family offers a variety of package options and choice of undervoltage lockout levels. The family has UVLO thresholds and hysteresis options for off-line and battery powered systems. Thresholds are shown in the ordering information table.The UCC2808A-xQ1 is an enhanced version of the UCC2808 family. The significant difference is that the A versions feature an internal discharge transistor from the CS pin to ground, which is activated each clock cycle during the oscillator dead time. The feature discharges any filter capacitance on the CS pin during each cycle and helps minimize filter capacitor values and current sense delay.

UCC2808A-1_16

LOW POWER CURRENT MODE PUSH-PULL PWM

UCC2808A-1EP

LOW POWER CURRENT MODE PUSH-PULL PWM

UCC2808A-1EP

LOW POWER CURRENT MODE PUSH-PULL PWM

UCC2808A-1EP_14

LOW POWER CURRENT MODE PUSH-PULL PWM