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OKL-T/3-W12 Series
Programmable Output 3-Amp i LGA SMT PoLs
External
+Logic Supply
(+5V max.)
+Vin
OKL -T
Power
Good
470K
Window
5mA max.
User’s External
+
Comparator
Logic
R1
OUT
Common
–Vin
Logic
Ground
SEQ
Control Voltage
SEQ
10K
–
Power
Output
HI impedance (Open Drain) = Power Ok
LO impedance (Saturation) = Power Not Ok
Figure 6. Power Good Circuit
Output Voltage Sequencing
The OKL modules include a sequencing feature that enables users to
implement various types of output voltage sequencing in their applications.
This is accomplished via an additional sequencing pin. When not using the
sequencing feature, either tie the sequence pin to Vin or leave it uncon-
nected.
When an analog voltage is applied to the sequence pin, the output
voltage tracks this voltage until the output reaches the set-point voltage.
The ?nal value of the sequence voltage must be set higher than the set-
GND
Figure 7. Sequencing Signal Interface of Module
Voltage Range Graph
Please observe the limits below for voltage input and output ranges. These
limits apply at all output currents.
16
14
12
10
point voltage of the module. The output voltage follows the voltage on the
sequence pin on a one-to-one volt basis. By connecting multiple modules
together, multiple modules can track their output voltages to the voltage
applied on the sequence pin.
8
6
4
Vin=4.5V / Vout=3.63V
Vin=14V / Vout=1V
For proper voltage sequencing, ?rst, input voltage is applied to the
module. The On/Off pin of the module is left unconnected (or tied to GND
for negative logic modules or tied to Vin for positive logic modules) so that
the module is ON by default. After applying input voltage to the module,
a minimum 10msec delay is required before applying voltage on the
2
0
0.5
1
1.5
2
2.5 3 3.5
Output Voltage (V)
4
Upper Limit
Lower Limit
4.5 5
5.5
sequence pin. During this time, a voltage of 50mV (± 20 mV) is maintained
Click here to view Application Note DCAN-61
on the sequence pin.This delay gives the module enough time to complete
its internal powerup soft-start cycle. During the delay time, the sequence
pin should be held close to ground (nominally 50mV ± 20 mV). This is re-
quired to keep the internal opamp out of saturation thus preventing output
overshoot during the start of the sequencing ramp. By selecting resistor R1
according to the following equation
23500
R1 = ———— ohms,
Vin – 0.05
the voltage at the sequencing pin will be 50mV when the sequencing
signal is at zero. See ?gure 7 for R1 connection for the sequencing signal to
the SEQ pin.
http://www.murata-ps.com/data/apnotes/dcan-61.pdf
Output Current Limiting
Current limiting inception is de?ned as the point at which full power falls
below the rated tolerance. See the Performance/Functional Speci?ca-
tions. Note particularly that the output current may brie?y rise above its
rated value in normal operation as long as the average output power is
not exceeded. This enhances reliability and continued operation of your
application. If the output current is too high, the converter will enter the
short circuit condition.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop
as the output current demand increases. If the output voltage drops too
low (approximately 98% of nominal output voltage for most models), the
magnetically coupled voltage used to develop PWM bias voltage will also
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MDC_OKL-T/3-W12 Series.B01 Page 15 of 17
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相关代理商/技术参数
OKL-T/3-W12P-C
制造商:Murata Power Solutions 功能描述:DC/DC Converter
OKL-T/3-W5
制造商:Murata Power Solutions 功能描述:- Rail/Tube
OKL-T/3-W5N-C
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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:
OKL-T/3-W5P-C
功能描述:DC/DC转换器 5Vin 0.6-3.63Vout 3A 9.9W Pos Polarity
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:
OKL-T/6-W12N-C
功能描述:DC/DC转换器 12Vin .59-5.5Vout 6A 30W Neg Polarity
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:
OKL-T/6-W12N-C
制造商:Murata Power Solutions 功能描述:DC/DC Converter
OKL-T/6-W12P-C
功能描述:DC/DC转换器 12Vin .59-5.5Vout 6A 30W Pos Polarity
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:
OKL-T/6-W5
制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Programmable Output 6-Amp iLGA SMT PoLs