UCC28500_TI 具有 16V/10V VCC UVLO 和 6.75V/5.5V PWM UVLO、温度范围为 -40°C 至 85°C 的 PFC/PWM 组合控制器

UCC28500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 - 功率因数校正 (PFC) 控制器
功能描述：具有 16V/10V VCC UVLO 和 6.75V/5.5V PWM UVLO、温度范围为 -40°C 至 85°C 的 PFC/PWM 组合控制器
点击这里打开及下载UCC28500的技术文档资料
TI代理渠道，提供当日发货、严格的质量标准，满足您的目标价格

UCC28500的产品详情：

The UCC2850x family provides all of the control functions necessary for an active power-factor-corrected preregulator and a second-stage dc-to-dc converter. The controller achieves near-unity power factor by shaping the ac input line current waveform to correspond to the ac input-line voltage using average current-mode control. The dc-to-dc converter uses peak current-mode control to perform the step-down power conversion.

The PFC stage is leading-edge modulated while the second stage is trailing-edge synchronized to allow for minimum overlap between the boost and PWM switches. This reduces ripple current in the bulk-output capacitor.In order to operate with over three-to-one range of input-line voltages, a line feedforward (V_FF) is used to keep input power constant with varying input voltage. Generation of V_FF is accomplished using I_AC in conjunction with an external single-pole filter. This not only reduces external parts count, but also avoids the use of high-voltage components, offering a lower-cost solution. The multiplier then divides the line current by the square of V_FF.

The UCC2850x PFC section incorporates a low offset-voltage amplifier with 7.5-V reference, a highly-linear multiplier capable of a wide current range, a high-bandwidth, low offset-current amplifier, with a novel noise-attenuation configuration, PWM comparator and latch, and a high-current output driver. Additional PFC features include over-voltage protection, zero-power detection to turn off the output when VAOUT is below 0.33 V and peak current and power limiting.

The dc-to-dc section relies on an error signal generated on the secondary-side and processes it by performing peak current mode control. The dc-to-dc section also features current limiting, a controlled soft-start, preset operating range with selectable options, and 50% maximum duty cycle.

The UCC28500 and UCC28502 have a wide PFC-UVLO threshold (16.5 V/10 V) for bootstrap bias supply operation. The UCC28501 and UCC28503 are designed with a narrow UVLO range (10.5 V/10 V) more suitable for fixed bias operation. The UCC28500 and UCC28501 have a narrow UVLO threshold for PWM stage (to allow operation down to 75% of nominal bulk voltage), while the UCC28502 and UCC38503 are configured for a much wider operation range for the PWM stage (down to 50% of bulk nominal voltage).

Available in 20-pin N and DW packages.

UCC28500的优势和特性：

Combines PFC and Downstream Converter Controls
Controls Boost Preregulator to Near-Unity Power Factor
Accurate Power Limiting
Improved Feedforward Line Regulation
Peak Current-Mode Control in Second Stage
Programmable Oscillator
Leading-Edge/Trailing-Edge Modulation for Reduced Output Ripple
Low Start-up Supply Current
Synchronized Second Stage Start-Up, with Programmable Soft-start
Programmable Second Stage Shutdown

UCC28500的参数（英文）：

Topology
Boost
Control mode
CCM
Practical operating frequency (Max) (MHz)
0.2
UVLO thresholds on/off (V)
16/10
Device type
Controllers
Operating supply current (mA)
4
Features
Average Current Mode, Continuous Control Mode , Enable, OVP
Rating
Catalog
Operating temperature range (C)
-40 to 85

UCC28500具体的完整产品型号参数及价格（美元）：

UCC28500的完整型号有：UCC28500DW、UCC28500DWTR、UCC28500N，以下是这些产品的关键参数及官网采购报价：

UCC28500DW，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：25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UCC28500DW的批量USD价格：3.863（1000+）

UCC28500DWTR，工作温度：-40 to 85，封装：SOIC (DW)-20，包装数量MPQ：2000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UCC28500DWTR的批量USD价格：3.311（1000+）

UCC28500N，工作温度：-40 to 85，封装：PDIP (N)-20，包装数量MPQ：18个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：NIPDAU，TI官网UCC28500N的批量USD价格：3.725（1000+）

UCC28500的评估套件：

UCC28500的电路图解：

UCC28500的评估套件：