- 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 8.4V/7.6V UVLO 和 50% 占空比、温度范围为 -40°C 至 85°C 的经济型单端 500KHz 电流模式 PWM 控制器
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The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or DC-to-DC fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.
- Optimized for Off-Line and DC-to-DC Converters
- Low Start-Up Current (< 1 mA)
- Automatic Feed-forward compensation
- Pulse-by-Pulse Current Limiting
- Enhanced Load-Response Characteristics
- Undervoltage Lockout With Hysteresis
- Double-Pulse Suppression
- High-Current Totem-Pole Output
- Internally Trimmed Bandgap Reference
- 500-kHz Operation
- Error Amplifier With Low Output Resistance
- Designed to be Interchangeable with UC2842 and UC3842 Series
- Topology
- Flyback, Boost,
- Duty cycle (Max) (%)
- 50
- Supply voltage (Max) (V)
- 30
- UVLO thresholds on/off (V)
- 8.4/7.6
- Features
- Adjustable Switching Frequency, Current Limiting, Error Amplifier, Multi-topology
- Operating temperature range (C)
- -40 to 85
- Rating
- Catalog
- Frequency (Max) (kHz)
- 500
- Gate drive (Typ) (A)
- 1
TL2845的完整型号有:TL2845D、TL2845D-8、TL2845DR、TL2845DR-8、TL2845P,以下是这些产品的关键参数及官网采购报价:
TL2845D,工作温度:-40 to 85,封装:SOIC (D)-14,包装数量MPQ:50个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TL2845D的批量USD价格:.42(1000+)
TL2845D-8,工作温度:-40 to 85,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TL2845D-8的批量USD价格:.42(1000+)
TL2845DR,工作温度:-40 to 85,封装:SOIC (D)-14,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:NIPDAU,TI官网TL2845DR的批量USD价格:.246(1000+)
TL2845DR-8,工作温度:-40 to 85,封装:SOIC (D)-8,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:NIPDAU,TI官网TL2845DR-8的批量USD价格:.209(1000+)
TL2845P,工作温度:-40 to 85,封装:PDIP (P)-8,包装数量MPQ:50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TL2845P的批量USD价格:.42(1000+)
TL2845D,工作温度:-40 to 85,封装:SOIC (D)-14,包装数量MPQ:50个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TL2845D的批量USD价格:.42(1000+)
TL2845D-8,工作温度:-40 to 85,封装:SOIC (D)-8,包装数量MPQ:75个,MSL 等级/回流焊峰值温度:Level-1-260C-UNLIM,引脚镀层/焊球材料:NIPDAU,TI官网TL2845D-8的批量USD价格:.42(1000+)
TL2845DR,工作温度:-40 to 85,封装:SOIC (D)-14,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:NIPDAU,TI官网TL2845DR的批量USD价格:.246(1000+)
TL2845DR-8,工作温度:-40 to 85,封装:SOIC (D)-8,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:NIPDAU,TI官网TL2845DR-8的批量USD价格:.209(1000+)
TL2845P,工作温度:-40 to 85,封装:PDIP (P)-8,包装数量MPQ:50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TL2845P的批量USD价格:.42(1000+)