參數(shù)資料
型號： PTB78560AAH
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT, DIP-11
文件頁數(shù)： 13/27頁
文件大小： 643K
代理商： PTB78560AAH
www.ti.com
1
5
6
3
4
2
Track
GND
Inhibit
Adjust
1
5
6
3
4
2
Track
GND
Inhibit
Adjust
5
1
3
4
5
9
11
10
8
7
6
2
Track
Sense
VI
NEN
PEN
VO Seq
+Sense
VO Bus
VO Adjust
VO COM
CI
100
F
VI
+VI
C2
220
F
R1
5.36 k
C3
47
F
U2
PTH04000W
VO Seq
(3.3 V)
VPOL1
(2.5 V)
VPOL2
(1.8 V)
C4
47
F
C6
47
F
R3
6.65 k
C5
47
F
R2
2.32 k
VO
VI
VO
U3
PTH04000W
U1
PTB78560B
VI
+VI
Power-Up Sequencing Without A VOSEQ Output (PTB78560A/C)
SLTS249 – JUNE 2005
Figure 28. Power-Up Sequencing With Nonisolated POL Modules
Although the PTB78560A or PTB78560C do not have a VOSeq output, they can provide the input power and
coordinate the power-up sequencing to two or more nonisolated, Auto-Track compliant power modules.
Figure 30 shows the PTB78560A (5 V) converter (U1) configured to provide both the input source and the
power-up sequence timing to two 5-V input nonisolated modules. The example shows two PTH04000W modules
(U2 and U3), each rated for up to 3 A of output current. In this case, the number of downstream modules, and
their respective output voltage and load current rating, is only limited by the amount of current available at the
VOBus output.
The output voltage of the PTB78560 must be set to a valid intermediate supply voltage. This depends on the
input voltage requirements of the downstream modules. For 5-V input modules, the PTB78560A is selected and
adjusted for an output of 5 V. For 12-V input modules, the PTB78560C is used and adjusted for an output of
12 V. U2 and U3, can be set to any voltage over their applicable adjustment range. In this example, they are
again set to 2.5 V (R2 = 2.32 k
) and 1.8 V (R3 = 6.65 k), respectively. Figure 29 shows the power-up
waveforms from Figure 30 when the Track control of all three modules are simply connected together.
The PTB78560 converter (U1) provides the required intermediate voltage from the VOBus output to power the
downstream modules, while holding the common Track control at ground potential. After allowing times for U2
and U3 to initialize, U1 removes the ground from the Track control, allowing this voltage to rise. The outputs
from the two nonisolated modules then rise simultaneously to their respective set-point voltages.
20
相關(guān)PDF資料
PDF描述
PTB78560CAS 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB78560BAZ 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB78560BAH 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB78560CAZ 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
PTB78560AAZ 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTB78560AAS 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTB78560AAZ 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTB78560BAH 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTB78560BAS 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTB78560BAZ 功能描述:DC/DC轉(zhuǎn)換器 30-W 24-V/48V Input DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
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