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參數(shù)資料
| 型號： | TPS40056PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 9/32頁 |
| 文件大?。?/td> | 747K |
| 代理商： | TPS40056PWPRG4 |
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TPS40056
SLVS612 APRIL 2006
17
www.ti.com
APPLICATION INFORMATION
UDG02139
I
ANTICROSS
CONDUCTION
SYNCHRONOUS
RECTIFIER ON
BODY DIODE
CONDUCTION
BODY DIODE
CONDUCTION
HIGH SIDE ON
ID1
ID2
IO
SW
0
}
d
1d
Figure 9. Inductor Current and SW Node Waveforms
The maximum allowable power dissipation in the MOSFET is determined by equation (29).
P
T +
T
J * TA
q
JA
(Watts)
where:
P
T + PCOND ) PSW(fsw)
(Watts)
and
θJA is the package thermal impedance.
Synchronous Rectifier MOSFET Power Dissipation
The power dissipated in the synchronous rectifier MOSFET is comprised of three components: RDS(on)
conduction losses, body diode conduction losses, and reverse recovery losses. RDS(on) conduction losses can
be found using equation (32) and the RMS current through the synchronous rectifier MOSFET is described in
equation (31).
I
RMS + IO
1
* d
Amperes
RMS
The body-diode conduction losses are due to forward conduction of the body diode during the anticross
conduction delay time. The body diode conduction losses are described by equation (32).
P
DC + 2
I
O
V
F
t
DELAY
f
SW
(Watts)
where:
D VF is the body diode forward voltage
D tDELAY is the total delay time just before the SW node rises.
(29)
(30)
(31)
(32)
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相關代理商/技術參數(shù) |
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| TPS40057 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE INPUT SYNCHRONOUS BUCK CONTROLLER |
| TPS40057PWP | 功能描述:DC/DC 開關控制器 Wide Input Sync Buck src/sink w/prebias RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| TPS40057PWP | 制造商:Texas Instruments 功能描述:CONTROLLER IC |
| TPS40057PWPG4 | 功能描述:DC/DC 開關控制器 Wide Input Sync Buck src/sink w/prebias RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
| TPS40057PWPR | 功能描述:DC/DC 開關控制器 Wide Input Sync Buck src/sink w/prebias RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 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 安裝風格: 封裝 / 箱體:CPAK |
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