- 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：在关断状态下具有低输出、温度范围为 0°C 至 70°C 的增强型 35V、双端 0.4A 400KHz PWM 控制器
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The UC1525B/1527B series of pulse width modulator integrated circuits are designed to offer improved performance and lowered external parts count when used in designing all types of switching power supplies. The on-chip +5.1V buried zener reference is trimmed to ±0.75% and the input common-mode range of the error amplifier includes the reference voltage, eliminating external resistors. A sync input to the oscillator allows multiple units to be slaved or a single unit to be synchronized to an external system clock. A single resistor between the CT and the discharge terminals provide a wide range of dead time adjustment. These devices also feature built-in soft-start circuitry with only an external timing capacitor required. A shutdown terminal controls both the soft-start circuitry and the output stages, providing instantaneous turn off through the PWM latch with pulsed shutdown, as well as soft-start recycle with longer shutdown commands. These functions are also controlled by an undervoltage lockout which keeps the outputs off and the soft-start capacitor discharged for subnormal input voltages. This lockout circuitry includes approximately 500mV of hysteresis for jitter-free operation. Another feature of these PWM circuits is a latch following the comparator. Once a PWM pulse has been terminated for any reason, the outputs will remain off for the duration of the period. The latch is reset with each clock pulse. The output stages are totem-pole designs capable of sourcing or sinking in excess of 200mA. The UC1525B output stage features NOR logic, giving a LOW output for an OFF state. The UC1527B utilizes OR logic which results in a HIGH output level when OFF.
- 8 to 35V Operation
- 5.1V Buried Zener Reference Trimmed to ±0.75%
- 100Hz to 500kHz Oscillator Range
- Separate Oscillator Sync Terminal
- Adjustable Deadtime Control
- Internal Soft-Start
- Pulse-by-Pulse Shutdown
- Input Undervoltage Lockout with Hysteresis
- Latching PWM to Prevent Multiple Pulses
- Dual Source/Sink Output Drivers
- Low Cross Conduction Output Stage
- Tighter Reference Specifications
- Topology
- Boost, Buck, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
- Duty cycle (Max) (%)
- 49
- Supply voltage (Max) (V)
- 40
- UVLO thresholds on/off (V)
- 7.0/6.5
- Features
- Adjustable Switching Frequency, Current Limiting, Dead Time Control, Error Amplifier, Multi-topology, Soft Start, Synchronization Pin
- Operating temperature range (C)
- 0 to 70
- Rating
- Catalog
- Frequency (Max) (kHz)
- 500
- Gate drive (Typ) (A)
- 0.4
UC3525B的完整型号有：UC3525BDW、UC3525BDWTR、UC3525BN，以下是这些产品的关键参数及官网采购报价：
UC3525BDW，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UC3525BDW的批量USD价格：2.947（1000+）
UC3525BDWTR，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UC3525BDWTR的批量USD价格：2.494（1000+）
UC3525BN，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UC3525BN的批量USD价格：2.834（1000+）
UC3525BDW，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UC3525BDW的批量USD价格：2.947（1000+）
UC3525BDWTR，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UC3525BDWTR的批量USD价格：2.494（1000+）
UC3525BN，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UC3525BN的批量USD价格：2.834（1000+）
