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参数资料
| 型号： | ULT-12/2.5-D48NM-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 25/26页 |
| 文件大小： | 0K |
| 描述： | DC/DC CONVERTER 12V 2.5A 30W |
| 标准包装： | 200 |
| 系列： | ULT |
| 类型： | 隔离 |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 36V |
| 电压 - 输入（最大）： | 75V |
| Voltage - Output 1： | 12V |
| 电流 - 输出（最大）： | 2.5A |
| 电源（瓦） - 制造商系列： | 30W |
| 电压 - 隔离： | 1.5kV（1500V） |
| 特点： | 具有远程开/关功能和 UVLO |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SMD 模块，1/32 砖 |
| 尺寸/尺寸： | 0.92" L x 0.75" W x 0.35" H（23.4mm x 19.1mm x 8.9mm） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 91% |
| 电源（瓦特）- 最大： | 30W |
| 其它名称： | 811-2324-6 |
ULT Series
Thirty-Second-Brick Isolated DC/DC Converters
with 2:1 Wide Input Range
On/Off Control
The input-side, remote On/Off Control function can be ordered to operate with
either logic type.
Positive ("P" suf?x) logic models are enabled when the on/off pin is left
open (or is pulled high, applying +2.4V to +5V with respect to –Input). Positive-
logic devices are disabled when the on/off pin is pulled low (-0.7 to 0.8V with
respect to –Input).
Negative (“N” suf?x) logic devices are off when pin is left open (or pulled
+VIN
ON/OFF
CONTROL
+Vcc
13V CIRCUIT
5V CIRCUIT
high, applying +2.4V to +5V), and on when pin is pulled low (–0.7 to +0.8V)
with respect to –Input.
Dynamic control of the remote on/off function is best accomplished with a
mechanical relay or an open-collector/open-drain drive circuit (optically isolated
if appropriate). The drive circuit should be able to sink appropriate current (see
Performance Speci?cations) when activated and withstand appropriate voltage
when deactivated. Applying an external voltage to pin 2 when no input power is
applied to the converter can cause permanent damage to the converter.
OUTPUT VOLTAGE ADJUSTMENT
–VIN
Figure 6. Driving the Negative Logic On/Off Control Pin
(simpli?ed circuit)
Trim Equations
Adjustable output voltage pin. If the Trim pin is left open circuit the output
voltage is set to Vo nom. Adjustment by means of the external resistor must be
+VIN
+VOUT
+SENSE
possible to achieve an output voltage of Vo nom. +10% or –20%.
Connecting an external resistor between the TRIM pin and the –Sense pin
ON/OFF
CONTROL
TRIM
R TRIM UP
LOAD
decreases the output voltage set point. The following equation determines the
required external resistor value to obtain a percentage output voltage change
of Δ%:
–SENSE
Rtrim-down = [(511/Δ%) – 10.22] KΩ
–VIN
–VOUT
Where:
Δ% = [(Vo set – Vdesired) / Vo set] x 100
Connecting an external resistor between the TRIM pin and the +Sense pin
increases the output voltage set point. The following equation determines the
required external resistor value to obtain a percentage output voltage change
Figure 7. Trim Connections To Increase Output Voltages
Connect sense to its respective V OUT pin if sense is not used with a remote load.
of Δ%:
Rtrim-up = [5.11 x Vo set x (100 +Δ%) / (1.225 x Δ%) – (511 / Δ%) – 10.22] KΩ
Where:
+VIN
+VOUT
+SENSE
Δ% = [(Vdesired – Vo set) / Vo set] x 100
ON/OFF
CONTROL
TRIM
R TRIM DOWN
LOAD
To maintain set point accuracy, the trim resistor tolerance should be at least
± 1.0%
–VIN
–SENSE
–VOUT
Figure 8. Trim Connections To Decrease Output Voltages
www.murata-ps.com/support
MDC_ULT Series.F01 Page 25 of 26
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