TL1454A Series

Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit

Catalog

Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit

Part	Output Type	Output Phases	Operating Temperature [Min]	Operating Temperature [Max]	Number of Outputs	Function	Output Configuration	Topology	Package / Case	Package / Case [x]	Package / Case [y]	Duty Cycle (Max) [Max]	Frequency - Switching [Max]	Frequency - Switching [Min]	Supplier Device Package	Control Features	Mounting Type	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Package / Case [custom]	Package / Case [custom]	Package / Case	Package / Case
Texas Instruments TL1454ACDR	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-SOIC	0.154 in	3.9 mm	100 %	2 MHz	50 kHz	16-SOIC	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V
Texas Instruments TL1454ACDG4	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-SOIC	0.154 in	3.9 mm	100 %	2 MHz	50 kHz	16-SOIC	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V
Texas Instruments TL1454ACPWR	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-TSSOP	0.173 in	4.4 mm	100 %	2 MHz	50 kHz	16-TSSOP	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V
Texas Instruments TL1454ACD	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-SOIC	0.154 in	3.9 mm	100 %	2 MHz	50 kHz	16-SOIC	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V
Texas Instruments TL1454ACDB	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-SSOP			100 %	2 MHz	50 kHz	16-SSOP	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V	0.209 in	5.3 mm
Texas Instruments TL1454ACDBR	Transistor Driver	1	-20 °C	85 C	2	Step-Down Step-Up Step-Up/Step-Down	Isolation Capable Positive	Boost Buck Flyback	16-SSOP			100 %	2 MHz	50 kHz	16-SSOP	Dead Time Control Frequency Control	Surface Mount	20 V	3.6 V	0.209 in	5.3 mm
Texas Instruments TL1454CD									16-SOIC	0.154 in	3.9 mm				16-SOIC		Surface Mount
Texas Instruments TL1454CN									16-DIP						16-PDIP		Through Hole					0.3 in	7.62 mm

Catalog

Dual-Channel Pulse-Width-Modulation (PWM) Control Circuit

Key Features

• Two Complete PWM Control CircuitsOutputs Drive MOSFETs DirectlyOscillator Frequency . . . 50 kHz to 2 MHz3.6-V to 20-V Supply-Voltage RangeLow Supply Current . . . 3.5 mA TypAdjustable Dead-Time Control, 0% to 100%1.26-V ReferenceTwo Complete PWM Control CircuitsOutputs Drive MOSFETs DirectlyOscillator Frequency . . . 50 kHz to 2 MHz3.6-V to 20-V Supply-Voltage RangeLow Supply Current . . . 3.5 mA TypAdjustable Dead-Time Control, 0% to 100%1.26-V Reference

Description

The TL1454A is a dual-channel pulse-width-modulation (PWM) control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters. Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference, oscillator, undervoltage lockout, and short-circuit protection are common to both channels. Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100% duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the TL1454A to be used in ground-sensing battery chargers as well as voltage converters. The TL1454A is a dual-channel pulse-width-modulation (PWM) control circuit, primarily intended for low-power, dc/dc converters. Applications include LCD displays, backlight inverters, notebook computers, and other products requiring small, high-frequency, dc/dc converters. Each PWM channel has its own error amplifier, PWM comparator, dead-time control comparator, and MOSFET driver. The voltage reference, oscillator, undervoltage lockout, and short-circuit protection are common to both channels. Channel 1 is configured to drive n-channel MOSFETs in step-up or flyback converters, and channel 2 is configured to drive p-channel MOSFETs in step-down or inverting converters. The operating frequency is set with an external resistor and an external capacitor, and dead time is continuously adjustable from 0 to 100% duty cycle with a resistive divider network. Soft start can be implemented by adding a capacitor to the dead-time control (DTC) network. The error-amplifier common-mode input range includes ground, which allows the TL1454A to be used in ground-sensing battery chargers as well as voltage converters.