參數(shù)資料
型號(hào)： TL1454ACDBR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1 A DUAL SWITCHING CONTROLLER, 2000 kHz SWITCHING FREQ-MAX, PDSO16
封裝： GREEN, SSOP-16
文件頁(yè)數(shù)： 23/25頁(yè)
文件大?。?/td> 503K
代理商： TL1454ACDBR
TL1454A, TL1454AY
DUALCHANNEL PULSEWIDTHMODULATION (PWM)
CONTROL CIRCUIT
SLVS423 A MAY 2002 REVISED SEPTEMBER 2002
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
short-circuit protection (SCP) (continued)
The SCP time-out period must be greater than the converter start-up time or the converter will not start. Because
high-value capacitor tolerances tend to be
±20% or more and IC resistor tolerances are loose as well, it is best
to choose an SCP time-out period 10-to-15 times greater than the converter startup time. The value of CSCP
may be determined using Figure 6, or it can be calculated using:
C
SCP +
T
SCP
80.3
where CSCP is in F and TSCP is the time-out period in ms.
output stage
The output stage of the TL1454A is a totem-pole output with a maximum source/sink current rating of 40 mA
and a voltage rating of 20 V. The output is controlled by a complementary output AND gate and is turned on
(sourcing current for OUT1, sinking current for OUT2) when all the following conditions are met: 1) the oscillator
triangle wave voltage is higher than both the DTC voltage and the error-amplifier output voltage, 2) the
undervoltage-lockout circuit is inactive, and 3) the short-circuit protection circuit is inactive.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC (see Note 1)
23 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error amplifier input voltage: IN1+, IN1 , IN2 +, IN2
23 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage: OUT1, OUT2
20 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current: OUT1, OUT2
±200 mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak output current: OUT1, OUT2
1 A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous total dissipation
See Dissipation Rating Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA: C suffix
20
°C to 85°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg
65
°C to 150°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
°C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network GND.
DISSIPATION RATING TABLE
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE TA = 25°C
TA = 70°C
POWER RATING
TA = 85°C
POWER RATING
D
950 mW
7.6 mW/
°C
608 mW
494 mW
DB
1000 mW
8.0 mW/
°C
640 mW
520 mW
N
1250 mW
10.0 mW/
°C
800 mW
650 mW
NS
1953 mW
15.6 mW/
°C
1250 mW
1015 mW
PW
500 mW
4.0 mW/
°C
320 mW
260 mW
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TL1454ACDBRG4 功能描述:DC/DC 開關(guān)控制器 Dual ch PWM Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TL1454ACDG4 功能描述:DC/DC 開關(guān)控制器 Dual ch PWM Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TL1454ACDR 功能描述:DC/DC 開關(guān)控制器 Dual-Ch PWM Control Circuit RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TL1454ACDRG4 功能描述:DC/DC 開關(guān)控制器 Dual-Ch PWM Control Circuit RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
TL1454ACN 功能描述:DC/DC 開關(guān)控制器 Dual ch PWM Ctlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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