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参数资料
| 型号： | PTB48560AAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 30 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-11 |
| 文件页数： | 10/29页 |
| 文件大小： | 800K |
| 代理商： | PTB48560AAH |
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www.ti.com
Power-Up Sequencing With A VO SEQ Output (PTB48560B)
15
6
4
2
15
6
4
2
1
2
4
5
9
11
10
8
7
6
VOAdjust
VOBus
VOSeq
Track
+Sense
V COM
O
-Sense
+VI
-V I
PEN
PTB48560B
+VI
-V I
R1
5.36 k
W
U1
U2
3
C2
100 F
m
R2
2.21 k
W
C3
100 F
m
C5
100 F
m
C4
100 F
m
3
U3
VI
PTH03050W
VO
Track
Inhibit GND Adjust
VI
PTH03050W
VO
Track
Inhibit GND Adjust
R3
5.49 k
W
VOSEQ (3.3 V)
V(POL)1 (2.5 V)
V
2 (1.8 V)
(POL)
3
NEN
C1
47 F
m
PTB48560A, PTB48560B
PTB48560C
SLTS236A–MARCH 2005–REVISED OCTOBER 2005
Figure 19 shows the PTB48560B converter (U1) providing two 3.3-V sources. This allows it to both power and
sequence with one or more downstream nonisolated modules. The example shows two 3.3-V input PTH03050W
modules (U2 and U3), each rated for up to 6 A of output current. The selection and current rating of the
nonisolated modules depends on the requirements of a specific application. The number of modules, their
respective output voltage, and load current rating combine with the load required at the VOSeq output. The total
must be supplied by the PTB48560B, and cannot exceed that available at the VOBus output.
Figure 19. Power-Up Sequencing With Nonisolated POL Modules
The output voltage adjust range of the PTB48560B is 1.8 V to 3.6 V. In these applications, the output voltage
must always be set to 3.3 V (R1 = 5.36 k). This sets the output voltage of both the VOBus and VOSeq outputs.
The output voltage of the 3.3-V input (nonisolated) modules, U2 and U3, can be set to any voltage over the
range, 0.8 V to 2.5 V. In this example, they are set to 2.5 V (R2 = 2.21 k) and 1.8 V (R3 = 5.49 k),
respectively. Figure 20 shows the power-up waveforms from Figure 19 when the Track input to all three modules
are simply connected together.
The converter provides input power to the downstream nonisolated modules via the VOBus output. This output
rises first to allow the nonisolated modules to complete their power-up initialization. The VOSeq (3.3 V), V(POL)1
(2.5 V) and V(POL)2 (1.8 V), outputs supply the load circuit, and rise simultaneously when the converter removes
the internal ground signal to its own Track input. The VOSeq output rises with the outputs from the nonisolated
modules, until it reaches its set-point voltage.
18
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PDF描述 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTB48560AAS | 功能描述:DC/DC转换器 30-W 3.6V to 5.5V Adj DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTB48560AAZ | 功能描述:DC/DC转换器 30-W 3.6V to 5.5V Adj DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTB48560B | 制造商:TI 制造商全称:Texas Instruments 功能描述:30-W, 48-V INPUT DC/DC CONVERTERS WITH AUTO-TRACK TM SEQUENCING |
| PTB48560BAH | 功能描述:DC/DC转换器 30-W 1.8V to 3.6V Adj DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTB48560BAS | 功能描述:DC/DC转换器 30-W 1.8V to 3.6V Adj DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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