UCC28221D 属性参数
- 标准包装：40
- 类别：集成电路 (IC)
- 家庭：PMIC - 稳压器 - DC DC 切换控制器
- 系列：-
- PWM 型：电流模式
- 输出数：2
- 频率 - 最大：2MHz
- 占空比：90%
- 电源电压：8.4 V ~ 14.5 V
- 降压：无
- 升压：无
- 回扫：是
- 反相：无
- 倍增器：无
- 除法器：无
- Cuk：无
- 隔离：是
- 工作温度：-40°C ~ 105°C
- 封装/外壳：16-SOIC（0.154"，3.90mm 宽）
- 包装：管件
- 其它名称：296-15757-5
产品特性
- 2-MHz High-Frequency Oscillator With 1-MHz Operation Per Channel
- Matched Internal Slope Compensation Circuits
- Programmable Maximum Duty Cycle Clamp 60% to 90% Per Channel
- Peak Current Mode Control With Cycle-by-Cycle Current Limit
- Current Sense Discharge Transistor for Improved Noise Immunity
- Accurate Line Undervoltage and Overvoltage Sense With Programmable Hysteresis
- Opto-Coupler Interface
- 110-V Internal Start-Up JFET (UCC28221)
- Operates From 12-V Supply (UCC28220)
- Programmable Soft Start
产品概述
The UCC28220 and UCC28221 are a family of BiCMOS interleaved dual channel PWM
controllers. Peak current mode control is used to ensure current sharing between the two channels.
A precise maximum duty cycle clamp can be set to any value between 60% and 90% duty cycle per
channel.The UCC28220 has an UVLO turnon threshold of
10 V for use in 12-V supplies while UCC28221 has a turnon threshold of 13 V for systems
needing wider UVLO hysteresis. Both have 8-V turnoff thresholds.Additional features include a programmable internal slope compensation with a special
circuit which is used to ensure exactly the same slope is added to each channel and a high-voltage
110-V internal JFET for easier start-up for the wider hysteresis UCC28221 version.The UCC28220 is available in both 16-pin SOIC and low-profile TSSOP packages. The
UCC28221 also comes in 16-pin SOIC package and a slightly larger 20-pin TSSOP package to allow for
high-voltage pin spacing to meet UL1950 creepage clearance safety requirements.
UCC28221D 数据手册
UCC28221D
UCC28221D 电路图
