參數(shù)資料
型號(hào)： TPS51427ARHBRG4
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： DUAL SWITCHING CONTROLLER, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁(yè)數(shù)： 25/42頁(yè)
文件大?。?/td> 2131K
代理商： TPS51427ARHBRG4
Loop Compensation and External Part Selection
Switching
Logic
DRVH
TPS51427A
DRVL
One Shot
Blanking
Period
+
R
FB
Q1
Q2
I
L
ESR
C
OUT
L
O
A
D
I
LOAD
V
OUT
VFB
High-Speed Comparator
VREF
UDG-08056
V
IN
Lo
I
t
ON
t
ON triggered when VOUT declines to VREF level
V
RIPPLE = IRIPPLE x ESR
I
LOAD
V
REF
I
RIPPLE
V
RIPPLE
www.ti.com .................................................................................................................................................. SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008
A simplified buck converter system using D-CAP mode is shown below in Figure 44.
Figure 44. D-CAP Mode Operation Schematic
Figure 45. D-CAP Mode Operation Waveforms
The output voltage is compared with an internal reference voltage through scaling. The PWM comparator
determines the timing to turn on the high side MOSFET. The gain and speed of the comparator is high enough to
keep the voltage at the beginning of each on cycle (or the end of off cycle) substantially constant. The DC output
voltage changes when the input voltage changes due to the fact that voltage regulation is maintained at the
valley point. Therefore, as the output ripple amplitude increases when the input voltage increases, the DC output
voltage increases as well.
Copyright 2008, Texas Instruments Incorporated
31
Product Folder Link(s): TPS51427A
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS51427ARHBT 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Sync Step Down Cntrlr 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
TPS51427ARHBTG4 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Synch Step Down Cntrlr 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
TPS51427RHBR 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Synch Step Down Cntrlr 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
TPS51427RHBRG4 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Sync Step Down Cntrlr 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
TPS51427RHBT 功能描述:DC/DC 開關(guān)控制器 Dual D-Cap Synch Step Down Cntrlr 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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