UC3825_TI 具有 9.2V/8.4V UVLO 和 85% 占空比、温度范围为 0°C 至 70°C 的增强型 30V、1.5A 双端 PWM 控制器

UC3825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：具有 9.2V/8.4V UVLO 和 85% 占空比、温度范围为 0°C 至 70°C 的增强型 30V、1.5A 双端 PWM 控制器
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UC3825的产品详情：

The UC1825 family of PWM control ICs is optimized for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.

These devices feature totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on state is designed as a high level.

UC3825的优势和特性：

Compatible with Voltage or Current Mode Topologies
Practical Operation Switching Frequencies to 1MHz
50ns Propagation Delay to Output
High Current Dual Totem Pole Outputs (1.5A Peak)
Wide Bandwidth Error Amplifier
Fully Latched Logic with Double Pulse Suppression
Pulse-by-Pulse Current Limiting
Soft Start / Max. Duty Cycle Control
Under-Voltage Lockout with Hysteresis
Low Start Up Current (1.1mA)

UC3825的参数（英文）：

Topology
Boost, Flyback, Forward, Half-Bridge, Push-Pull
Duty cycle (Max) (%)
85
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)
0 to 70
Rating
Catalog
Frequency (Max) (kHz)
1000
Gate drive (Typ) (A)
1.5

UC3825具体的完整产品型号参数及价格（美元）：

UC3825的完整型号有：UC3825DW、UC3825DWTR、UC3825N，以下是这些产品的关键参数及官网采购报价：

UC3825DW，工作温度：0 to 70，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UC3825DW的批量USD价格：2.119（1000+）

UC3825DWTR，工作温度：0 to 70，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UC3825DWTR的批量USD价格：1.793（1000+）

UC3825N，工作温度：0 to 70，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UC3825N的批量USD价格：2.282（1000+）

UC3825的评估套件：

UC3825的电路图解：

UC3825的评估套件：