TL1454A

更新时间： 2024-09-14 03:59:35

品牌	Logo	应用领域
德州仪器 - TI		脉冲
页数	文件大小	规格书
27页	410K
描述
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

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TL1454A 数据手册

TL1454A, TL1454AY

DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)

CONTROL CIRCUIT

SLVS423 A– MAY 2002 – REVISED SEPTEMBER 2002

D, N OR PW PACKAGE

(TOP VIEW)

Two Complete PWM Control Circuits

Outputs Drive MOSFETs Directly

Oscillator Frequency . . . 50 kHz to 2 MHz

3.6-V to 20-V Supply-Voltage Range

Low Supply Current . . . 3.5 mA Typ

Adjustable Dead-Time Control, 0% to 100%

1.26-V Reference

REF

SCP

DTC2

DTC1

IN1+

13 IN2+

IN2–

IN1–

COMP2

COMP1

GND

description

OUT2

OUT1

The TL1454A is a dual-channel pulse-width-mod-

ulation (PWM) control circuit, primarily intended

for low-power, dc/dc converters. Applications

include LCD displays, backlight inverters, note-

book 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.

AVAILABLE OPTIONS

†

PACKAGED DEVICES

CHIP FORM

(Y)

SMALL OUTLINE

(D)

PLASTIC DIP

(N)

TSSOP

(PW)

SSOP

(DB)

SOP-EIAJ

(NS)

–20°C to 85°C

TL1454ACD

TL1454ACN

TL1454ACPWR

TL1454ACDB

TL1454ACNS

TL1454AY

†

The D, DB and NS packages are available taped and reeled. Add the suffix R to the device name (e.g., TL1454ACDR). The PW package is

available only left-end taped and reeled (indicated by the R suffix on the device type; e.g., TL1454ACPWR).

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

POST OFFICE BOX 655303 • DALLAS, TEXAS 75265

12 3 4 5 6 7...27

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与TL1454A相关器件

型号	品牌	获取价格	描述	数据表
TL1454ACD	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACDB	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACDBG4	TI	获取价格	1A DUAL SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SSOP-16
TL1454ACDBR	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACDBRG4	TI	获取价格	1A DUAL SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDSO16, GREEN, SSOP-16
TL1454ACDR	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACN	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACNE4	TI	获取价格	1A DUAL SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDIP16, ROHS COMPLIANT, PLASTIC,
TL1454ACNS	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT
TL1454ACNSR	TI	获取价格	DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT

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