LM3478 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller | 德州仪器 TI.com.cn

LM3478 (正在供货) 2.97~40V Wide Input Range Boost/SEPIC/Flyback DC-DC Controller

 

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描述

The LM3478 is a versatile Low-Side N-Channel MOSFET controller for switching regulators. It is suitable for use in topologies requiring a low side MOSFET, such as boost, flyback, SEPIC, etc. Moreover, the LM3478 can be operated at extremely high switching frequency in order to reduce the overall solution size. The switching frequency of the LM3478 can be adjusted to any value between 100 kHz and 1 MHz by using a single external resistor. Current mode control provides superior bandwidth and transient response, besides cycle-by-cycle current limiting. Output current can be programmed with a single external resistor.

The LM3478 has built-in features such as thermal shutdown, short-circuit protection, over voltage protection, etc. Power saving shutdown mode reduces the total supply current to 5 µA and allows power supply sequencing. Internal soft-start limits the inrush current at start-up.

特性

  • 8-lead VSSOP-8 and SOIC-8 packages
  • Internal Push-Pull Driver With 1-A Peak Current Capability
  • Current Limit and Thermal Shutdown
  • Frequency Compensation Optimized With a Capacitor and a Resistor
  • Internal Soft Start
  • Current Mode Operation
  • Undervoltage Lockout With Hysteresis
  • Create a Custom Design Using the LM3478 with the WEBENCH Power Designer

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WEBENCH® Designer LM3478

  最小   最大 范围
输入电压  V 2.97 to 40.0V
输出电压  V 1.26 to 300V
输出电流  A ≤ 20A
环境温度  °C -40 to 125°C

参数

与其它产品相比 升压控制器(外部开关) 邮件 下载到电子表格中
Part number 立即下单 Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Regulated outputs (#) Switching frequency (Min) (kHz) Switching frequency (Max) (kHz) Iq (Typ) (mA) Features Duty cycle (Max) (%) Operating temperature range (C) Rating Type Package Group
LM3478 立即下单 2.97     40     1.26     500     1     100     1000     2.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
100     -40 to 125     Catalog     Controller     SOIC | 8
VSSOP | 8    
LM3017 立即下单 5     18     6     20     1     400     400     1.4     Enable
Load Disconnect    
85     -40 to 125     Catalog     Controller     WQFN | 10    
LM3481 立即下单 2.97     48     1.275     500     1     100     1000     3.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
85     -40 to 125     Catalog     Controller     VSSOP | 10    
LM3481-Q1 立即下单 2.97     48     1.275     500     1     100     1000     3.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up
UVLO Adjustable    
85     -40 to 125     Automotive     Controller     VSSOP | 10    
LM3488 立即下单 2.97     40     1.26     500     1     100     1000     2.7     Adjustable Current Limit
Enable
Frequency Synchronization
Light Load Efficiency
Pre-Bias Start-Up    
100     -40 to 125     Catalog     Controller     VSSOP | 8    
LM5022 立即下单 6     60     1.25     300     1     170     2200     3.5     Enable
Frequency Synchronization
UVLO Adjustable