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| 型号： | QD48T018025-NBB0 |
| 厂商： | Power-One |
| 文件页数： | 5/15页 |
| 文件大小： | 0K |
| 描述： | CONV DC-DC 37.5W 2.5/1.8V DUAL |
| 标准包装： | 25 |
| 系列： | QD48 |
| 类型： | 隔离 |
| 输出数： | 2 |
| 电压 - 输入（最小）： | 36V |
| 电压 - 输入（最大）： | 75V |
| Voltage - Output 1： | 1.8V |
| Voltage - Output 2： | 2.5V |
| 电流 - 输出（最大）： | 15A，15A |
| 电源（瓦） - 制造商系列： | 37W |
| 电压 - 隔离： | 2kV（2000V） |
| 安装类型： | 通孔 |
| 封装/外壳： | 7-DIP 模块，1/4 砖 |
| 尺寸/尺寸： | 2.30" L x 1.45" W x 0.34" H（58.4mm x 36.8mm x 8.6mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 87% |
| 电源（瓦特）- 最大： | 37.5W |
| 产品目录页面： | 2739 (CN2011-ZH PDF) |
| 其它名称： | 179-2237 QD48T018025-NAA0 QD48T018025-NBBO |
QD48T0180205 DC-DC Converter Data Sheet
36-75 VDC Input; 1.8 and 2.5 VDC @ 15A Output
Operation
Input and Output Impedance
These power converters have been designed to be stable
with no external capacitors when used in low inductance in-
put and output circuits.
However, in many applications, the inductance associated
with the distribution from the power source to the input of the
converter can affect the stability of the converter. The addi-
tion of a 33 μ F electrolytic capacitor with an ESR < 1 ?
across the input helps ensure stability of the converter. In
many applications, the user has to use decoupling capaci-
tance at the load. The converter will exhibit stable operation
with external load capacitance up to 10,000 μ F on both out-
case it should be capable of sourcing or sinking up to 1 mA
depending on the signal polarity. See the Start-up Informa-
tion section for system timing waveforms associated with
use of the ON/OFF pin.
Output Voltage Adjust /TRIM (Pin 6)
The converter’s output voltages can be adjusted simultane-
ously up 10% or down 10% relative to the rated output volt-
ages by the addition of an externally connected resistor.
The TRIM pin should be left open if trimming is not being
used. To minimize noise pickup, a 0.1 μ F capacitor is con-
nected internally between the TRIM and RETURN pins.
Q Family
puts.
Vin (+)
TM
Converter
Vout2 (+)
ON/OFF (Pin 2)
The ON/OFF pin is used to turn the power converter on or
off remotely via a system signal. There are two remote con-
trol options available, positive logic and negative logic and
Vin
ON/OFF
Vin (-)
(Top View)
TRIM
RTN
Vout1 (+)
R T-INCR
Rload2
Rload1
both are referenced to Vin(-). Typical connections are shown
in Fig. 2.
Fig. 3: Configuration for increasing output voltage .
Q Family
Vin
Vin (+)
ON/OFF
TM
Converter
(Top View)
Vout2 (+)
TRIM
RTN
Rload2
To increase the output voltage (refer to Fig. 3), a trim resis-
tor, R T-INCR , should be connected between the TRIM (Pin 6)
and RETURN (Pin 5), with a value from the table below.
Q Family
Vin (-)
Vout1 (+)
Rload1
Vin (+)
TM
Converter
Vout2 (+)
CONTROL
INPUT
Fig. 2: Circuit configuration for ON/OFF function.
Vin
ON/OFF
(Top View)
TRIM
RTN
R T-DECR
Rload2
Rload1
The positive logic version turns on when the ON/OFF pin is
at logic high and turns off when at logic low. The converter is
Vin (-)
Vout1 (+)
on when the ON/OFF pin is left open .
The negative logic version turns on when the pin is at logic
low and turns off when the pin is at logic high. The ON/OFF
pin can be hard wired directly to Vin(-) to enable automatic
power up of the converter without the need of an external
control signal.
ON/OFF pin is internally pulled-up to 5 V through a resistor.
A mechanical switch, open collector transistor, or FET can
be used to drive the input of the ON/OFF pin. The device
must be capable of sinking up to 0.2 mA at a low level volt-
age of ≤ 0.8 V. An external voltage source of ± 20 V max.
may be connected directly to the ON/OFF input, in which
Fig. 4: Configuration for decreasing output voltage .
To decrease the output voltage, a trim resistor R T-DECR , (Fig.
4) should be connected between the TRIM (Pin 6) and
Vout2(+) pin (Pin 7), with a value from the table below,
where:
? = percentage of increase or decrease Vout(NOM).
Note 1: Both outputs are trimmed up or down simultane-
ously.
MAY 08, 2003 revised to NOV 13, 2006
Page 5 of 15
www.power-one.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QD48T018025-NBB0G | 制造商:Power-One 功能描述: |
| QD48T018025-NBC0 | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 1.8V/2.5V 15A - Bulk |
| QD48T018025-NBC0G | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 1.8V/2.5V 15A - Bulk |
| QD48T018025-NCB0 | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 1.8V/2.5V 15A - Bulk |
| QD48T018025-NCB0G | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 1.8V/2.5V 15A - Bulk |
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