The UC1825 PWM control device 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 1-V 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 undervoltage lockout section with 800 mV of hysteresis assures low start up current. During undervoltage lockout, the outputs are high impedance.

This device features 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.

• QML-V Qualified, SMD 5962-87681
• Rad-Tolerant: 30 kRad (Si) TID(1)
• Compatible With Voltage- or Current-Mode Topologies
• Practical Operation Switching Frequencies to 1MHz
• 50-ns Propagation Delay-to-Output
• High-Current Dual Totem Pole Outputs (1.5APeak)
• Wide Bandwidth Error Amplifier
• Fully Latched Logic With Double-Pulse Suppression
• Pulse-by-Pulse Current Limiting
• Soft Start/Maximum Duty-Cycle Control
• Undervoltage Lockout With Hysteresis
• Low Start-Up Current (1.1mA)

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.

• Topology
• Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
• Duty cycle (Max) (%)
• 80
• Supply voltage (Max) (V)
• 20
• UVLO thresholds on/off (V)
• 9.2/8.4
• Features
• Error Amplifier, Multi-topology, Soft Start, Synchronization Pin
• Operating temperature range (C)
• -55 to 125
• Rating
• Space
• Frequency (Max) (kHz)
• 1000
• Gate drive (Typ) (A)
• 1.5

UC1825-SP的完整型号有：5962-8768101V2A、5962-8768101VEA、5962-8768104V2A、5962-8768104VEA，以下是这些产品的关键参数及官网采购报价：

5962-8768101V2A，工作温度：-55 to 125，封装：LCCC (FK)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8768101V2A的批量USD价格：392.338（1000+）

5962-8768101VEA，工作温度：-55 to 125，封装：CDIP (J)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8768101VEA的批量USD价格：392.338（1000+）

5962-8768104V2A，工作温度：-55 to 125，封装：LCCC (FK)-20，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8768104V2A的批量USD价格：470.805（1000+）

5962-8768104VEA，工作温度：-55 to 125，封装：CDIP (J)-16，包装数量MPQ：1个，MSL 等级/回流焊峰值温度：N/A for Pkg Type，引脚镀层/焊球材料：SNPB，TI官网5962-8768104VEA的批量USD价格：470.805（1000+）

UC1825 TINA-TI Transient Reference Design

此参考设计在 40W 下可从 70V 至 120V 直流输入电压生成隔离式 ±15V 输出。该设计使用磁反馈电路来替代光耦合器的功能。

PMP23033 — 具有磁反馈的 40W 5V 单开关正向转换器参考设计

此参考设计在 40W 下从 60V 至 120V 直流输入电压生成隔离式 5V 电压。该设计使用磁反馈电路来替代光耦合器的功能。