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参数资料
| 型号： | LSN-0.8/15-D12J |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | SIP-10 |
| 文件页数： | 6/10页 |
| 文件大小： | 489K |
| 代理商： | LSN-0.8/15-D12J |
LSN-15A D12 Models
NON-ISOLA TED , 12-75W SIP DC/DC CONVER TERS
Output Voltage Trimming
Allowable trim ranges for each model in the LSN D12 SIP Series are ±10%.
Trimming is accomplished with either a trimpot or a single xed resistor. The
trimpot should be connected between +Output and Common with its wiper
connected to the Trim pin as shown in Figure 3 below.
A trimpot can be used to determine the value of a single xed resistor
which can then be connected, as shown in Figure 4, between the Trim pin
and +Output to trim down the output voltage, or between the Trim pin and
Common to trim up the output voltage. Fixed resistors should have absolute
TCR’s less than 100ppm/
°C to ensure stability.
The equations below can be used as starting points for selecting specic trim-
resistor values. Recall, untrimmed devices are guaranteed to be
±1% accurate.
Adjustment beyond the specied ±10% adjustment range is not recommended.
Figure 4. Trim Connections Using Fixed Resistors
Note:
Install either a xed
trim-up resistor
or a xed trim-down
resistor depending upon
desired output voltage.
Output Overvoltage Protection
LSN D12 SIP Series DC/DC converters do not incorporate output overvolt-
age protection. In the extremely rare situation in which the device’s feedback
loop is broken, the output voltage may run to excessively high levels (VOUT =
VIN). If it is absolutely imperative that you protect your load against any and
all possible overvoltage situations, voltage limiting circuitry must be provided
external to the power converter.
On/Off Control and Power-up Sequencing
The On/Off Control pin may be used for remote on/off operation. LSN D12 SIP
Series DC/DC's are designed so they are enabled when the control pin is
left open (internal pull-down to Common) and disabled when the control pin is
pulled high (+2.8V to +VIN), as shown in Figure 2 and 2a.
Dynamic control of the on/off function is best accomplished with a mechanical
relay or open-collector/open-drain drive circuit. The drive circuit should be
able to sink appropriate current when activated and withstand appropriate
voltage when deactivated.
Figure 3. Trim Connections Using a Trimpot
Figure 2. Driving the On/Off Control Pin with an External
Open-Collector Drive Circuit
LOAD
20k
5-10
Turns
+INPUT
COMMON
+OUTPUT
TRIM
Trim
Down
Trim
Up
LOAD
+INPUT
COMMON
+OUTPUT
TRIM
COMMON
5
The on/off control function, however, can be externally inverted so that the
converter will be disabled while the input voltage is ramping up and then
"released" once the input has stabilized.
For a controlled start-up of one or more LSN-D12's, or if several output
voltages need to be powered-up in a given sequence, the On/Off Control pin
can be pulled high (external pull-up resistor, converter disabled) and then
driven low with an external open collector device to enable the converter.
Figure 2a. Inverting On/Off Control Pin with an External CMOS Gate
Output Overcurrent Detection
Overloading the output of a power converter for an extended period of
time will invariably cause internal component temperatures to exceed their
maximum ratings and eventually lead to component failure. High-current-
carrying components such as inductors, FET's and diodes are at the highest
risk. LSN D12 SIP Series DC/DC converters incorporate an output overcur-
rent detection and shutdown function that serves to protect both the power
converter and its load.
If the output current exceeds it maximum rating by typically 60% (24 Amps) or
if the output voltage drops to less than 98% of it original value, the LSN D12's
internal overcurrent-detection circuitry immediately turns off the converter,
which then goes into a "hiccup" mode. While hiccupping, the converter will
continuously attempt to restart itself, go into overcurrent, and then shut down.
Under these conditions, the average output current will be approximately
400mA, and the average input current will be approximately 40mA. Once the
output short is removed, the converter will automatically restart itself.
+INPUT
POWER
COMMON
CONTROLLER
SHUTDOWN
SIGNAL
GROUND
4.12k
15.4k
ON/OFF
CONTROL
+INPUT
POWER
COMMON
CONTROLLER
SHUTDOWN
SIGNAL
GROUND
4.12k
15.4k
ON/OFF
CONTROL
CMOS
LOGIC
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相关代理商/技术参数 |
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| LSN-1.1/10-D12 | 功能描述:DC/DC转换器 11W 12V to 1.1V 10A 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: |
| LSN-1.1/10-D12B | 功能描述:DC/DC转换器 11W 12V to 1.1V 10A 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: |
| LSN-1.1/10-D12B-C | 功能描述:DC/DC转换器 11W 12V to 1.1V 10A 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: |
| LSN-1.1/10-D12BH | 功能描述:DC/DC转换器 11W 12V to 1.1V 10A 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: |
| LSN-1.1/10-D12BH-C | 功能描述:DC/DC转换器 11W 12V to 1.1V 10A 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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