参数资料
型号: PTB48560BAH
厂商: Texas Instruments
文件页数: 18/29页
文件大小: 0K
描述: CONV DC/DC 3.3V 8A HZ T/H 11DIP
标准包装: 12
系列: PTB48560
类型: 隔离
输出数: 1
电压 - 输入(最小): 36V
电压 - 输入(最大): 75V
Voltage - Output 1: 1.8 ~ 3.6 V
电流 - 输出(最大): 8A
电源(瓦) - 制造商系列: 30W
电压 - 隔离: 1.5kV(1500V)
安装类型: 通孔
封装/外壳: 11-DIP 模块
尺寸/尺寸: 2.05" L x 1.05" W x 0.39" H(51.9mm x 26.5mm x 10.0mm)
包装: 托盘
工作温度: -40°C ~ 85°C
效率: 82%
电源(瓦特)- 最大: 30W
产品目录页面: 2703 (CN2011-ZH PDF)
其它名称: 296-20341
PTB48560BAH-ND
PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
www.ti.com
Power-Up Sequencing With A V O SEQ Output (PTB48560B)
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 V O Seq output. The total
must be supplied by the PTB48560B, and cannot exceed that available at the V O Bus output.
U1
5
Track
PTB48560B
V O SEQ (3.3 V)
+Sense
9
U2
2
+V I
1
+V I
V O Seq
V O Bus
11
10
3
V I
Track
PTH03050W
V O
6
V (POL) 1 (2.5 V)
2.21 k W
-V I
2
3
4
PEN
NEN
-V I
V O Adjust
V O COM
-Sense
8
6
7
C1
47 m F
R1
5.36 k W
Inhibit GND Adjust
4 1 5
R2
C2
100 m F
C3
100 m F
U3
2
Track
3
V I
PTH03050W
V O
6
V (POL) 2 (1.8 V)
Inhibit GND Adjust
4
1 5
C4
100 m F
R3
5.49 k W
C5
100 m F
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 V O Bus and V O Seq 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 V O Bus output. This output
rises first to allow the nonisolated modules to complete their power-up initialization. The V O Seq (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 V O Seq output rises with the outputs from the nonisolated
modules, until it reaches its set-point voltage.
18
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PTB48560CAH 功能描述:DC/DC转换器 30-W 9V to 13.2V 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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