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參數資料
| 型號： | TL1454AY |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT |
| 中文描述： | 雙通道脈寬調制（PWM）控制電路 |
| 文件頁數： | 1/27頁 |
| 文件大小： | 409K |
| 代理商： | TL1454AY |
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TL1454A, TL1454AY
DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A– MAY 2002 – REVISED SEPTEMBER 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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
description
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)
TA
SMALL OUTLINE
(D)
PLASTIC DIP
(N)
TSSOP
(PW)
SSOP
(DB)
SOP-EIAJ
(NS)
–20
°
C to 85
°
C
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).
TL1454ACD
TL1454ACN
TL1454ACPWR
TL1454ACDB
TL1454ACNS
TL1454AY
Copyright
2002, Texas Instruments Incorporated
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.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
CT
RT
DTC1
IN1+
IN1–
COMP1
GND
OUT1
D, N OR PW PACKAGE
(TOP VIEW)
REF
SCP
DTC2
IN2+
IN2–
COMP2
V
CC
OUT2
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| TL1454CD | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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| TL1454CPW | 制造商:TI 制造商全稱:Texas Instruments 功能描述:DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT |
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