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TL1451A

ACTIVE

3.6V to 50V dual channel controller with Wide input voltage range

Product details

Topology Boost, Buck, Flyback, Forward, SEPIC Vin (min) (V) 3.6 Vin (max) (V) 50 Vout (min) (V) 1 Vout (max) (V) 50 Regulated outputs (#) 2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Iq (typ) (mA) 1.7 Features Nonsynchronous rectification Duty cycle (max) (%) 100 Rating Automotive, Catalog Operating temperature range (°C) -40 to 125 Type Controller
Topology Boost, Buck, Flyback, Forward, SEPIC Vin (min) (V) 3.6 Vin (max) (V) 50 Vout (min) (V) 1 Vout (max) (V) 50 Regulated outputs (#) 2 Switching frequency (min) (kHz) 50 Switching frequency (max) (kHz) 500 Iq (typ) (mA) 1.7 Features Nonsynchronous rectification Duty cycle (max) (%) 100 Rating Automotive, Catalog Operating temperature range (°C) -40 to 125 Type Controller
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (D) 16 59.4 mm² 9.9 x 6 SOP (NS) 16 79.56 mm² 10.2 x 7.8 SSOP (DB) 16 48.36 mm² 6.2 x 7.8 TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet Dual Pulse-Width-Modulation Control Circuits datasheet (Rev. E) 13 Mar 2002
Application note 스트컨버터의 전력계 기본 계산 (Rev. D) PDF | HTML 21 Nov 2022
Application note Basic Calculation of a Boost Converter's Power Stage (Rev. D) PDF | HTML 28 Oct 2022
Application note Understanding Inverting Buck-Boost Power Stages in Switch Mode Power Supplies (Rev. B) 12 Mar 2019
Application note Understanding Boost Power Stages In Switchmode Power Supplies 04 Mar 1999
Application note Understanding Buck Power Stages In Switchmode Power Supplies 04 Mar 1999

Design & development

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Supported products & hardware

Supported products & hardware

Products
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Buck converters (integrated switch)
LM5015 4.25-75V, Monolithic Two-Switch Forward DC-DC Regulator
Isolated DC/DC converters & modules
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Boost controllers (external switch)
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PDIP (N) 16 View options
SOIC (D) 16 View options
SOP (NS) 16 View options
SSOP (DB) 16 View options
TSSOP (PW) 16 View options

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