UC28025_TI 经济型双端高速 PWM 控制器

UC28025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：经济型双端高速 PWM 控制器
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UC28025的产品详情：

The UC28023 and UC28025 are fixed-frequency PWM controllers optimized for high-frequency switched-mode power-supply applications. The UC28023 is a single output PWM for single-ended topologies while the UC28025 offers dual alternating outputs for double-ended and full bridge topologies.

Targeted for cost-effective solutions with minimal external components. UC2802x devices include an oscillator, a temperature compensated reference, a wide bandwidth error amplifier, a high-speed current-sense comparator, and high-current, active-high, totem-pole outputs to directly drive external MOSFETs.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which doubles as a maximum duty-cycle clamp. The logic is fully latched to provide jitter-free operation and prohibit multiple pulses at an output. An undervoltage lockout section with 800 mV of hysteresis assures low start-up current. During undervoltage lockout, the outputs are high impedance. Propagation delays through the comparators and logic circuitry have been minimized while maximizing bandwidth and slew rate of the error amplifier.

Devices are available in the industrial temperature range of –40°C to 105°C. Package offerings are 16-pin SOIC (DW), or 16-pin PDIP (N) packages.

UC28025的优势和特性：

Peak Current Mode, Average Current Mode, or Voltage Mode (With FeedForward) Control Methods
Practical Operation Up to 1 MHz
50-ns Propagation Delay to Output
±1.5-A Peak Totem Pole Outputs
9-V to 30-V Nominal Operational Voltage
Wide Bandwidth Error Amplifier
Fully Latched Logic With Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Programmable Maximum Duty Cycle Control
Undervoltage Lockout With Hysteresis
Trimmed 5.1-V Reference With UVLO
Same Functionality as UC3823 and UC3825

UC28025的参数（英文）：

Topology
Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Duty cycle (Max) (%)
45
Supply voltage (Max) (V)
12
UVLO thresholds on/off (V)
9.2/8.4
Features
Adjustable Switching Frequency, Current Limiting, Error Amplifier, Multi-topology, Programmable Max Duty Cycle, Soft Start, Synchronization Pin
Operating temperature range (C)
-40 to 105
Rating
Catalog
Frequency (Max) (kHz)
1000
Gate drive (Typ) (A)
1.5

UC28025具体的完整产品型号参数及价格（美元）：

UC28025的完整型号有：UC28025DW、UC28025DWR、UC28025N，以下是这些产品的关键参数及官网采购报价：

UC28025DW，工作温度：-40 to 105，封装：SOIC (DW)-16，包装数量MPQ：40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UC28025DW的批量USD价格：1.496（1000+）

UC28025DWR，工作温度：-40 to 105，封装：SOIC (DW)-16，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UC28025DWR的批量USD价格：1.247（1000+）

UC28025N，工作温度：-40 to 105，封装：PDIP (N)-16，包装数量MPQ：25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UC28025N的批量USD价格：1.683（1000+）

UC28025的评估套件：

UC28025的电路图解：

UC28025的评估套件：