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参数资料
| 型号： | HPQ-12/25-D48NBL1-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 14/16页 |
| 文件大小： | 0K |
| 描述： | CONV DC/DC 300W 12V 25A |
| 标准包装： | 60 |
| 系列： | * |
| 其它名称： | HPQ-12/25-D48NBL1C HPQ-12/25-D48NBL1C-ND Q7059696A |
HPQ-12/25-D48 Series
Isolated 300-Watt Quarter Brick DC-DC Converters
CAUTION : Be careful of external electrical noise. The Trim input is a senstive
input to the converter’s feedback control loop. Excessive electrical noise may
cause instability or oscillation. Keep external connections short to the Trim
input. Use shielding if needed.
Trim Equations
Remote On/Off Control
On the input side, a remote On/Off Control can be speci?ed with either positive
or negative logic as follows:
Positive : Models equipped with Positive Logic are enabled when the On/Off pin
is left open or is pulled high to +13.5V DC with respect to –V IN . An internal bias
[
R adj_up (in kΩ) = 5.11 x - - 2
12V x (1+Δ) 1
1.225 x Δ Δ
]
current causes the open pin to rise to +V IN . Positive-logic devices are disabled
when the On/Off is grounded or brought to within a low voltage (see Speci?ca-
where Δ =
V out - 12V
12V
tions) with respect to –V IN .
On positive-logic models, to reduce noise coupling on the external on/off
12V - V out
12V
R adj_down (in kΩ) = 5.11 x
where Δ =
[ Δ 1 - 2 ]
control, use the circuit shown in ?gure 6.
+INPUT
316 KΩ
Where Vout = Desired output voltage. Adjustment accuracy is subject to resis-
ON/OFF
2.5V CIRCUIT
tor tolerances and factory-adjusted output accuracy. Mount trim resistor close
to converter. Use short leads. Note that “Δ” is given as a small fraction, not a
percentage.
47 KΩ
0.1 μF
-INPUT
Figure 6. On/Off Control Filter
+VOUT
+VIN
+SENSE
Negative: Models with negative logic are on (enabled) when the On/Off is
grounded or brought to within a low voltage (see Speci?cations) with respect to
–V IN . The device is off (disabled) when the On/Off is left open or is pulled high
to +13.5V DC Max. with respect to –V IN .
ON/OFF
CONTROL
TRIM
R TRIM UP
LOAD
Dynamic control of the On/Off function should be able to sink the speci?ed
signal current when brought low and withstand speci?ed voltage when brought
-SENSE
high. Be aware too that there is a ?nite time in milliseconds (see Speci?cations)
between the time of On/Off Control activation and stable, regulated output. This
–VIN
–VOUT
time will vary slightly with output load type and current and input conditions.
There are two CAUTIONs for the On/Off Control:
Figure 4. Trim adjustments to Increase Output Voltage using a Fixed Resistor
CAUTION: While it is possible to control the On/Off with external logic if you
carefully observe the voltage levels, the preferred circuit is either an open
drain/open collector transistor or a relay (which can thereupon be controlled
+VIN
+VOUT
+SENSE
by logic). The On/Off prefers to be set at approx. +13.5V (open pin) for the ON
state, assuming positive logic.
CAUTION: Do not apply voltages to the On/Off pin when there is no input power
voltage. Otherwise the converter may be permanently damaged.
ON/OFF
CONTROL
TRIM
R TRIM DOWN
LOAD
+VCC
-SENSE
–VIN
–VOUT
ON/OFF
CONTROL
Figure 5. Trim adjustments to Decrease Output Voltage using a Fixed Resistor
-VIN
Figure 7. Driving the On/Off Control Pin (suggested circuit)
www.murata-ps.com/support
MDC_HPQ-12/25-D48 Series.B07 Page 14 of 16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| HPQ1225D48NL1C | 制造商:Murata Power Solutions 功能描述: |
| HPQ-12-D48_11 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Isolated 300-Watt Quarter Brick DC/DC Converters |
| HPQ-12W | 制造商:MINI 制造商全称:Mini-Circuits 功能描述:POWER SPLITTERS/COMBINERS |
| HPQ-15 | 制造商:MINI 制造商全称:Mini-Circuits 功能描述:POWER SPLITTERS/COMBINERS |
| HPQ-15W | 制造商:MINI 制造商全称:Mini-Circuits 功能描述:POWER SPLITTERS/COMBINERS |
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