收藏本站
PTB48560A, PTB48560B
PTB48560C
SLTS236A – MARCH 2005 – REVISED OCTOBER 2005
www.ti.com
APPLICATION INFORMATION (continued)
output that exceeds the converter overcurrent threshold (see applicable specification) causes the output voltage
to momentarily fold back, and then shut down. Following shutdown, the module periodically attempts to
automatically recover by initiating a soft-start power up. This is often described as a hiccup mode of operation,
whereby the module continues in the cycle of successive shutdown and power up until the load fault is removed.
Once the fault is removed, the converter automatically recovers and returns to normal operation.
Input Overvoltage Protection
The converter protects itself against input voltage surges and transients of up to 100 V. This is above the
maximum continuous operating input voltage of 75 V. In order to protect itself, the converter output is disabled at
some voltage above 75 V. This is to ensure that the converter internal components are not exposed to voltages
above their stress ratings. The converter output remains off for some of the period that the input voltage is above
the maximum continuous rating. Once the overvoltage event has passed, the output from the converter
automatically restarts by executing a soft-start power up.
Differential Output Voltage Sense
A differential remote sense allows a converter regulation circuitry to compensate for limited amounts of IR drop,
that may be incurred between the converter and load, in either the positive or return PCB traces. Connecting the
+Sense and –Sense pins to the respective positive and ground reference of the load terminals improves the load
regulation of the converter output voltage at that connection point. The –Sense pin should always be connected
to the V O COM . The +Sense pin may be connected to either the +V O Bus or +V O Seq outputs.
When the +Sense pin is connected to the V O Seq output, the voltage at V O Bus voltage regulates slightly higher.
Depending on the load conditions on the V O Seq output, the voltage at V O Bus may be up to 100 mV higher than
the converter set-point voltage. In addition, the Smart-Sense feature (incorporated into the converter) only
engages sense compensation to the V O Seq output when that output voltage is close to the set-point. During a
power-up sequencing event, the sense circuit automatically defaults to sensing the V O Bus voltage, internal to
the converter.
Leaving the +Sense and –Sense pins open does not damage the converter or load circuit. The converter
includes default circuitry that keeps the output voltage in regulation. However, if the remote sense feature is not
used, the –Sense pin should still be connected to V O COM .
Note: The remote sense feature is not designed to compensate for the forward drop of nonlinear or
frequency-dependent components that may be placed in series with the converter output. Examples include
OR-ing diodes, filter inductors, ferrite beads, and fuses. When these components are enclosed by the sense pin
connections, they are effectively placed inside the regulation control loop, which can adversely affect the stability
of the converter.
Overtemperature Protection
Overtemperature protection is provided by an internal temperature sensor, which monitors the temperature of the
converter PCB (close to pin 1). If the PCB temperature exceeds a nominal 115°C, the converter shuts down. The
converter then automatically restarts when the sensed temperature falls to approximately 105°C. When operated
outside its recommended thermal derating envelope (see data sheet derating curves), the converter typcially
cycles on and off at intervals from a few seconds to one or two minutes. This is to ensure that the internal
components are not permanently damaged from excessive thermal stress.
Output Voltage Adjustment
An external resistor is required to set the nominal output voltage(s) of the converter to a voltage higher than its
minimum value. The resistor, R SET , must be connected directly between the V O Adjust (pin 8) and –Sense (pin 7)
terminals. A 0.05-W rated resistor can be used. The tolerance should be 1%, with a temperature stability of 100
ppm/°C (or better). Place the resistor close to the converter and connect it using dedicated PCB traces (see
Figure 14 ). Table 1 gives the nearest standard value of external resistor for the common voltages within each
model's adjust range. The actual output voltage that the resistor value provides is also provided.
12
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
PTH03000WAD MODULE PIP 3.3VIN 6A ADJ T/H
PTKM10-180SM TOROIDAL POWER CHOKE 10UH SMD
PV37W504C01B00 TRIMMER 500K OHM 0.25W TH
PVC6282 CAP FILM 8200PF 600VDC RADIAL
PVF2A504A11R00 TRIMMER 500K OHM 0.001W SMD
PVM-16V121MG70E-R2 CAP ALUM 120UF 16V 20% SMD
PWR1317AC CONV DC/DC +/-15V +/-50MA DIP
PWR1726AC CONV DC/DC 1.5W UNREG DIP
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: