UCC28C42 BiCMOS Low Current 8 Pin PWM Current Mode Controller | TI.com

UCC28C42 (ACTIVE)

BiCMOS Low Current 8 Pin PWM Current Mode Controller

 

Description

UCCx8C4x family are high-performance, current-mode PWM controllers. The UCCx8C4x is an enhanced BiCMOS version with pin-for-pin compatibility to the industry standard UCx84xA family and UCx84x family of PWM controllers. The BiCMOS technology offers lower power consumption to improve efficiency as well as faster current sense and oscillator frequency. In addition, lower startup voltage versions of 7 V are offered as UCCx8C40 and UCCx8C41 for use in battery systems. The UCC28C4x series is specified for operation from –40°C to 105°C, and the UCC38C4x series is specified for operation from 0°C to 70°C.

Providing necessary features to control fixed frequency, peak current-mode power supplies, this family offers the following performance advantages. The device offers high-frequency operation up to 1 MHz, suitable for high speed applications. The trimmed discharge current enables more precise programming of the maximum duty cycle and dead-time limit when compared to the UCx84x family. Reduced start-up and operating currents minimizes start-up loss and low operating power consumption for improved efficiency. The device also features a fast current-sense-to-output delay time of 35 ns for superior overload protection at the power switch, and a ±1-A peak output current capability with improved rise and fall times for driving large external MOSFETs directly.

The UCC38C4x family is offered in 8-pin VSSOP (DGK), 8-pin SOIC (D), and 8-pin PDIP (P) packages.

Features

  • Enhanced Replacement for UCx84x and UCx84xA Family With Pin-to-Pin Compatibility
  • 1-MHz Operation
  • 50-µA Standby Current, 100-µA Maximum
  • Low Operating Current of 2.3 mA at 52 kHz
  • Fast 35-ns Cycle-by-Cycle Over-Current Limiting
  • ±1-A Peak Output Current
  • Rail-to-Rail Output Swings with 25-ns Rise and 20-ns Fall Times
  • ±1% Initial Trimmed 2.5-V Error Amplifier Reference
  • Trimmed Oscillator Discharge Current
  • New Undervoltage Lockout Versions
  • VSSOP-8 Package Minimizes Board Space

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Parametrics Compare all products in PWM controllers & resonant controllers

 
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)
UCC28C42 UCC28C40 UCC28C41 UCC28C43 UCC28C44 UCC28C45
Boost
Buck
Buck-Boost
Flyback
Forward    
Boost
Buck
Buck-Boost
Flyback
Forward    
Boost
Buck
Buck-Boost
Flyback
Forward    
Boost
Buck
Buck-Boost
Flyback
Forward    
Boost
Buck
Buck-Boost
Flyback
Forward    
Boost
Buck
Buck-Boost
Flyback
Forward    
Peak Current Mode     Peak Current Mode     Peak Current Mode     Peak Current Mode     Peak Current Mode     Peak Current Mode    
14.5     7     7     8.4     14.5     8.4    
18     18     18     18     18     18    
1000     1000     1000     1000     1000     1000    
14.5/9     7/6.6     7/6.6     8.4/7.6     14.5/9     8.4/7.6    
100     100     50     100     50     50    
1     1     1     1     1     1    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Adjustable Switching Frequency
Current Limiting
Dead Time Control
Error Amplifier
Multi-topology
Programmable Max Duty Cycle    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
-40 to 105     -40 to 105
-40 to 85    
-40 to 105     -40 to 105     -40 to 105
-40 to 85    
-40 to 105    
PDIP | 8
SOIC | 8
VSSOP | 8    
PDIP | 8
SOIC | 8
VSSOP | 8    
SOIC | 8
VSSOP | 8    
PDIP | 8
SOIC | 8
VSSOP | 8    
PDIP | 8
SOIC | 8
VSSOP | 8    
PDIP | 8
SOIC | 8
VSSOP | 8    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    
See datasheet (PDIP)
8SOIC: 29 mm2: 6 x 4.9 (SOIC | 8)
8VSSOP: 15 mm2: 4.9 x 3 (VSSOP | 8)    

Design tool

WEBENCH® Designer UCC28C42

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 16.50 to 2000.00V
Vout  V 3.3 to 1000V
Iout  A ≤ 100A
Ambient Temp  °C -40 to 105°C