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TL1451ACNS 参数 Datasheet PDF下载

TL1451ACNS图片预览
型号: TL1451ACNS
PDF下载: 下载PDF文件 查看货源
内容描述: SUAL脉宽调制控制电路 [SUAL PULSE-WIDTH-MODULATION CONTROL CIRCUITS]
分类和应用: 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
文件页数/大小: 37 页 / 1287 K
品牌: TI [ TEXAS INSTRUMENTS ]
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TL1451A
DUAL PULSE WIDTH MODULATION CONTROL CIRCUITS
SLVS024E – FEBRUARY 1983 – REVISED NOVEMBER 1999
D
D
D
D
D
D
D
D
D
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, undervol-
tage lockout circuitry, and dual common-emitter
output transistor circuits.
The uncommitted output transistors provide
common-emitter output capability for each
1IN+
1IN–
NC
1FEEDBACK
IDTC
4
5
6
7
8
3
2
1
20 19
18
2IN+
17
2IN–
16
NC
15
2FEEDBACK
14
2DTC
9
10 11 12 13
1OUT
GND
V CC
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 V
CC
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.
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
SMALL
OUTLINE
(D)
TL1451ACD
TL1451AQD
SMALL
OUTLINE
(DB)†
TL1451ACDB
PLASTIC DIP
(N)
TL1451ACN
SMALL
OUTLINE
(NS)
TL1451ACNS
TSSOP
(PW)†
TL1451ACPW
CHIP
CARRIER
(FK)
TL1451AMFK
CERAMIC
DIP
(J)
TL1451AMJ
–20°C to 85°C
–40°C to 125°C
–55°C to 125°C
† The DB and PW packages are only available left-end taped and reeled (add LE suffix, i.e., TL1451ACPWLE).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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.
Copyright
1999, Texas Instruments Incorporated
On products compliant to MIL PRF 38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
2OUT
NC
SCP
REF
NC
CT
RT
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
D, DB, N, NS, PW, OR J PACKAGE
(TOP VIEW)
CT
RT
ERROR
1IN+
AMPLIFIER 1 1IN–
1FEEDBACK
1DTC
1OUT
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
REF
SCP
2IN+
ERROR
2IN–
AMPLIFIER 2
2FEEDBACK
2DTC
2OUT
V
CC
FK PACKAGE
(TOP VIEW)
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