- 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 P 或 N 沟道钳位 FET 和 75% 最大占空比的 90V 有源钳位电压模式 PWM 控制器
- 点击这里打开及下载LM5025B的技术文档资料
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The LM5025B is a functional variant of the LM5025 active clamp PWM controller. The functional differences of the LM5025B are as follows:
- The maximum PWM duty cycle is limited to less than 75% to reduce voltage stress on the power MOSFETs.
- The CS2 hiccup mode threshold is increased to 0.5V
- The CS2 filter discharge device is disabled
- The VCC regulator continues to operate when the line UVLO is below the threshold of normal operation
- The VREF regulator is switched off when the line UVLO input falls below the operating threshold
- The internal 5k? COMP pin pull-up resistor is removed
The LM5025B PWM controller contains all of the features necessary to implement power converters utilizing the Active Clamp / Reset technique. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp / reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The two internal compound gate drivers parallel both MOS and Bipolar devices, providing superior gate drive characteristics. This controller is designed for high-speed operation including an oscillator frequency range up to 1MHz and total PWM and current sense propagation delays less than 100ns.
The LM5025B includes a high-voltage start-up regulator that operates over a wide input range of 13V to 100V. Additional features include: Line Under Voltage Lockout (UVLO), softstart, oscillator UP/DOWN sync capability, precision reference and thermal shutdown.
- Internal Start-Up Bias Regulator
- 3A Compound Main Gate Driver
- Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
- Voltage Mode Control with Feed-Forward
- Adjustable Dual Mode Over-Current Protection
- Programmable Overlap or Deadtime between the Main and Active Clamp Outputs
- Volt x Second Maximum Duty Cycle Clamp
- Programmable Soft-Start
- Current Sense Leading Edge Blanking
- Single Resistor Programmable Oscillator
- Oscillator Up / Down Sync Capability
- Precision 5V Reference
- Thermal Shutdown
- TSSOP-16
- WSON-16 (5x5 mm) Thermally Enhanced
All trademarks are the property of their respective owners.
- Topology
- Active-Clamp Forward, Forward
- Duty cycle (Max) (%)
- 73
- Supply voltage (Max) (V)
- 15
- UVLO thresholds on/off (V)
- Programmable/2.5V
- Features
- Current Limiting, HV Start-up, Leading Edge Blanking, Soft Start, Supports NFET Clamp, Supports PFET Clamp, Thermal Shutdown
- Operating temperature range (C)
- -40 to 125
- Rating
- Catalog
- Frequency (Max) (kHz)
- 1000
- Gate drive (Typ) (A)
- 3
LM5025B的完整型号有：LM5025BMTC/NOPB、LM5025BMTCX/NOPB、LM5025BSD/NOPB，以下是这些产品的关键参数及官网采购报价：
LM5025BMTC/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：92个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BMTC/NOPB的批量USD价格：1.376（1000+）
LM5025BMTCX/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BMTCX/NOPB的批量USD价格：1.147（1000+）
LM5025BSD/NOPB，工作温度：-40 to 125，封装：WSON (NHQ)-16，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BSD/NOPB的批量USD价格：1.147（1000+）
LM5025BMTC/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：92个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BMTC/NOPB的批量USD价格：1.376（1000+）
LM5025BMTCX/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BMTCX/NOPB的批量USD价格：1.147（1000+）
LM5025BSD/NOPB，工作温度：-40 to 125，封装：WSON (NHQ)-16，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM5025BSD/NOPB的批量USD价格：1.147（1000+）
