Low Power, Dual Output, Current Mode PWM Controller - UCC3806

UCC3806 (ACTIVE)

Low Power, Dual Output, Current Mode PWM Controller

Description

The UCC3806 family of BiCMOS PWM controllers offers exceptionally improved performance with a familiar architecture. With the same block diagram and pinout of the popular UC3846 series, the UCC3806 line features increased switching frequency capability while greatly reducing the bias current used within the device. With a typical startup current of 50µA and a well defined voltage threshold for turn-on, these devices are favored for applications ranging from off-line power supplies to battery operated portable equipment. Dual high current, MOSFET driving outputs and a fast current sense loop further enhance device versatility.

All the benefits of current mode control including simpler loop closing, voltage feed-forward, parallelability with current sharing, pulse-by-pulse current limiting, and push-pull symmetry correction are readily achievable with the UCC3806 series.

These devices are available with multiple package options for both through-hole and surface mount applications; and in commercial, industrial, and military temperature ranges.

The UCC3806 is specified for operation from –55°C to +125°C, the UCC2806 is specified for operation from –40°C to +85°C, and the UCC3806 is specified for operation from 0°C to +70°C.

Features

  • BiCMOS Version of UC3846 Families
  • 1.4-mA Maximum Operating Current
  • 100-µA Maximum Startup Current
  • ±0.5-A Peak Output Current
  • 125-ns Circuit Delay
  • Easier Parallelability
  • Improved Benefits of Current Mode Control

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Parametrics Compare all products in PWM and Resonant Controller

 
Topology
Control Method
Duty Cycle (Max) (%)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Regulated Outputs (#)
Special Features
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
UCC3806 UCC1806 UCC2806
Boost
Buck
Flyback
Forward    
Boost
Flyback
Forward    
Boost
Flyback
Forward    
Current     Current     Current    
50     50     50    
1000     1000     1000    
7.5/6.75     7.5/6.75     7.5/6.75    
2     2     2    
Error Amplifier
Soft Start
Synchronization Pin    
Error Amplifier
Soft Start
Synchronization Pin    
Error Amplifier
Soft Start
Synchronization Pin    
Catalog     Military     Military    
0 to 70     -55 to 125     -40 to 85    
16PDIP
16SOIC
16TSSOP
20PLCC    
16CDIP
20LCCC    
16PDIP
16SOIC
16SSOP
16TSSOP
20PLCC    
4.10 | 1ku        

Other qualified versions of UCC3806

Version Part Number Definition
Military UCC1806 QML certified for Military and Defense Applications
Catalog UCC3806M TI's standard catalog product
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