TL1451A (ACTIVE)

Dual Channel Controller with Wide Input Voltage Range

Dual Channel  Controller with Wide Input Voltage Range - TL1451A
Datasheet
 

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Description

The TL1451A incorporates on a single monolithic chip all the functions required in the construction of two pulse-width-modulation (PWM) control circuits. Designed primarily for power-supply control, the TL1451A contains an on-chip 2.5-V regulator, two error amplifiers, an adjustable oscillator, two dead-time comparators, undervoltage lockout circuitry, and dual common-emitter output transistor circuits.

The uncommitted output transistors provide common-emitter output capability for each controller. The internal amplifiers exhibit a common-mode voltage range from 1.04 V to 1.45 V. The dead-time control (DTC) comparator has no offset unless externally altered and can provide 0% to 100% dead time. The on-chip oscillator can be operated by terminating RT and CT. During low VCC conditions, the undervoltage lockout control circuit feature locks the outputs off until the internal circuitry is operational.

The TL1451AC is characterized for operation from -20°C to 85°C. The TL1451AQ is characterized for operation from -40°C to 125°C. The TL1451AM is characterized for operation from -55°C to 125°C.

Features

  • Complete PWM Power Control Circuitry
  • Completely Synchronized Operation
  • Internal Undervoltage Lockout Protection
  • Wide Supply Voltage Range
  • Internal Short-Circuit Protection
  • Oscillator Frequency...500 kHz Max
  • Variable Dead Time Provides Control Over Total Range
  • Internal Regulator Provides a Stable 2.5-V Reference Supply
  • Available in Q-Temp Automotive
    HighRel Automotive Applications
    Configuration Control / Print Support
    Qualification to Automotive Standards

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Parametrics Compare all products in Buck/Boost or Inverting Controller (External Switch)

 
Topology
Vin (Min) (V)
Vin (Max) (V)
Vout (Min) (V)
Vout (Max) (V)
Switch Current Limit (Min) (A)
Duty Cycle (Max) (%)
Switching Frequency (Min) (kHz)
Switching Frequency (Max) (kHz)
Iq (Typ) (mA)
Features
Iout (Max) (A)
Operating Temperature Range (C)
Rating
Package Group
TL1451A TL1451A-EP
Boost
Buck
Flyback
Forward
Inverting
SEPIC   
Buck/Boost   
3.6    3.6   
50    50   
1    1   
50    50   
3    3   
100    100   
50    50   
500    500   
1.7    1.7   
N/A     
3    3   
-20 to 85
-40 to 125   
-55 to 125   
  HiRel Enhanced Product   
PDIP
SO
SOIC
SSOP
TSSOP   
SOIC   

Other qualified versions of TL1451A

Version Part Number Definition
Automotive TL1451A-Q1 Q100 devices qualified for high-reliability automotive applications targeting zero defects
Enhanced Product TL1451A-EP Supports Defense, Aerospace and Medical Applications

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