TL2844 Current-Mode PWM Controller | TI.com

TL2844
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
Current-Mode PWM Controller

Current-Mode PWM Controller - TL2844
Datasheet
 

Description

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.

Features

  • 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

WEBENCH® Designer TL2844

 AC  DC  
AC Frequency  60 Hz  50 Hz
Use Isolated Output?
  Min   Max Range
VinRMS  V 18.00 to 2000.00V
Vout  V 3.3 to 1000V
Iout  A ≤ 100A
Ambient Temp  °C -40 to 85°C

Parametrics

Compare all products in PWM controllers & resonant controllers Email Download to Excel
Part number Order 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)
TL2844 Order now Boost
Flyback
Forward    
Current     16     30     500     16/10     50     0.2     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology    
Catalog     -40 to 85     PDIP | 8
SOIC | 14
SOIC | 8    
8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)    
TL2842 Samples not available Boost
Flyback
Forward    
Current     16     30     500     16/10     100     0.2     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology    
Catalog     -40 to 85     PDIP | 8
SOIC | 14
SOIC | 8    
8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)    
TL2843 Samples not available Boost
Flyback
Forward    
Current     8.4     30     500     8.4/7.6     100     0.2     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology    
Catalog     -40 to 85     PDIP | 8
SOIC | 14
SOIC | 8    
8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)    
TL2845 Samples not available Boost
Flyback
Forward    
Current     8.4     30     500     8.4/7.6     50     0.2     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology    
Catalog     -40 to 85     PDIP | 8
SOIC | 14
SOIC | 8    
8PDIP: 93 mm2: 9.43 x 9.81 (PDIP | 8)
8SOIC: 19 mm2: 3.91 x 4.9 (SOIC | 8)
14SOIC: 52 mm2: 6 x 8.65 (SOIC | 14)