UCC3810 双通道同步电流模式 PWM | 德州仪器 TI.com.cn

UCC3810 (正在供货) 双通道同步电流模式 PWM

双通道同步电流模式 PWM - UCC3810
数据表
 

描述

The UCC3810 is a high-speed BiCMOS controller integrating two synchronized pulse width modulators for use in off-line and dc-to-dc power supplies. The UCC3810 family provides perfect synchronization between two PWMs by usin g the same oscillator. The oscillator’s sawtooth waveform can be used for slope compensation if required.

Using a toggle flip-flop to alternate between modulators, the UCC3810 ensures that one PWM does not slave, interfere, or otherwise affect the other PWM. This toggle flip- flop also ensures that each PWM is limited to 50% maximum duty cycle, insuring adequate off-time to reset magnetic elements. This device contains many of the same elements of the UC3842 current mode controller family, combined with the enhancements of the UCC3802. This minimizes power supply parts count. Enhancements include leading edge blanking of the current sense signals, full cycle fault restart, CMOS output drivers, and outputs which remain low even when the supply voltage is removed.

特性

  • Single Oscillator Synchronizes Two PWMs
  • 150-µA Startup Supply Current
  • 2-mA Operating Supply Current
  • Operation to 1 MHz
  • Internal Soft-Start
  • Full-Cycle Fault Restart
  • Internal Leading-Edge Blanking of theCurrent Sense Signal
  • 1-A Totem Pole Outputs
  • 75-ns Typical Response from Current Sense to Output
  • 1.5% Tolerance Voltage Reference

参数

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Part number 立即下单 Topology Control method VCC (Min) (V) VCC (Max) (V) Frequency (Max) (kHz) UVLO thresholds on/off (V) Duty cycle (Max) (%) Gate drive (Typ) (A) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
UCC3810 立即下单 Boost
Buck
Flyback
Forward    
Current     11.3     11     1000     11.3/8.3     50     1     Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start
Synchronization Pin    
Catalog     0 to 70     PDIP | 16
SOIC | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)    
UCC2810 立即下单 Boost
Flyback
Forward    
Current     11.3     11     1000     11.3/8.3     50     1     Adjustable Switching Frequency
Error Amplifier
Leading Edge Blanking
Multi-topology
Programmable Max Duty Cycle
Soft Start
Synchronization Pin    
Catalog     -40 to 85     PDIP | 16
SOIC | 16    
16PDIP: 181 mm2: 9.4 x 19.3 (PDIP | 16)
16SOIC: 77 mm2: 7.5 x 10.3 (SOIC | 16)    
UCC28220 立即下单 Flyback
Forward    
Current     8.4     14.5     2000     10.0/8.0     90     0.01     Adjustable Switching Frequency
Current Limiting
Input Line Monitor
Multi-topology
Programmable Max Duty Cycle
Programmable Slope Compensation
Soft Start    
Catalog     -40 to 105     SOIC | 16
TSSOP | 16    
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
UCC28221 无样片 Flyback
Forward    
Current     8.4     14.5     2000     13.0/8.0     90     0.01     Adjustable Switching Frequency
Current Limiting
HV Start-up
Input Line Monitor
Multi-topology
Programmable Max Duty Cycle
Programmable Slope Compensation
Soft Start    
Catalog     -40 to 105     SOIC | 16
TSSOP | 20    
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)