PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
U1
5
Track
PTB48560A
www.ti.com
V O BUS (5 V)
+Sense
9
U2
2
+V I
1
+V I
V O Bus
10
3
V I
Track
PTH05050W
V O
6
V (POL) 1 (3.3 V)
698 W
-V I
2
3
4
PEN
NEN
-V I
V O Adjust
V OCOM
-Sense
8
6
7
C1
47 m F
R1
14.3 k W
Inhibit GND Adjust
4 1 5
R2
C2
100 m F
C3
100 m F
U3
2
Track
3
V I
PTH05050W
V O
6
V (POL) 2 (1.5 V)
Inhibit GND Adjust
4
1 5
C4
100 m F
R3
8.87 k W
C5
100 m F
Figure 21. Power-Up Sequencing With Nonisolated POL Modules
The output voltage of the PTB48560 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 PTB48560A is selected and
adjusted for an output of 5 V. For 12-V input modules, the PTB48560C 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 set
to 3.3 V (R2 = 698 ? ) and 1.5 V (R3 = 8.87 k ? ), respectively. Figure 22 shows the power-up waveforms from
Figure 21 when the Track control of all three modules are simply connected together.
The PTB48560 converter (U1) provides the required intermediate voltage from the V O Bus 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
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相关代理商/技术参数
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:
PTB48560BAZ 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:
PTB48560C 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
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:
PTB48560CAS 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:
PTB48560CAZ 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:
PTB48580A 制造商:TI 制造商全称:Texas Instruments 功能描述:Dual Complementary-Output DC/DC Converter for DSL
PTB48580AAH 功能描述:DC/DC转换器 .+/-5V 30W Comp Out put 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: