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参数资料
| 型号： | UVQ-18/5.6-D24NB-C |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-8 |
| 文件页数： | 4/25页 |
| 文件大小： | 3470K |
| 代理商： | UVQ-18/5.6-D24NB-C |
Figure 5.Trim Connections To Increase Output Voltages Using Fixed Resistors
LOAD
RTRIM DOWN
+OUTPUT
–INPUT
+INPUT
ON/OFF
CONTROL
TRIM
+SENSE
–OUTPUT
–SENSE
4
5
1
3
6
8
7
2
Figure 6.Trim Connections To Decrease Output Voltages Using Fixed Resistors
Thermal Shutdown
UVQ converters are equipped with thermal-shutdown circuitry. If the inter-
nal temperature of the DC/DC converter rises above the designed operating
temperature (See Performance Specifications), a precision temperature sensor
will power down the unit. When the internal temperature decreases below the
threshold of the temperature sensor, the unit will self start.
Output Overvoltage Protection
The output voltage is monitored for an overvoltage condition via magnetic cou-
pling to the primary side. If the output voltage rises to a fault condition, which
could be damaging to the load circuitry (see Performance Specifications), the
sensing circuitry will power down the PWM controller causing the output volt-
age to decrease. Following a time-out period the PWM will restart, causing the
output voltage to ramp to its appropriate value. If the fault condition persists,
and the output voltages again climb to excessive levels, the overvoltage
circuitry will initiate another shutdown cycle. This on/off cycling is referred to
as "hiccup" mode.
Input Reverse-Polarity Protection
If the input-voltage polarity is accidentally reversed, an internal diode will
become forward biased and likely draw excessive current from the power
source. If the source is not current limited or the circuit appropriately fused, it
could cause permanent damage to the converter.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of a sustained, non-current-limited, input-voltage polarity
reversal exists. For MPS UVQ Series DC/DC Converters, slow-blow fuses are
recommended with values no greater than twice the maximum input current.
Trimming Output Voltage
UVQ converters have a trim capability (pin 6) that enables users to adjust the
output voltage from +10% to –20% (refer to the trim equations). Adjustments
to the output voltage can be accomplished with a single fixed resistor as shown
in Figures 5 and 6. A single fixed resistor can increase or decrease the output
voltage depending on its connection. Resistors should be located close to
the converter and have TCR's less than 100ppm/°C to minimize sensitivity to
changes in temperature. If the trim function is not used, leave the trim pin open.
Standard UVQ's have a "positive trim" where a single resistor connected
from the Trim pin (pin 6) to the +Sense (pin 7) will increase the output voltage. A
resistor connected from the Trim Pin (pin 6) to the –Sense (pin 5) will decrease
the output voltage.
Trim adjustments greater than the specified +10%/–20% can have an
adverse affect on the converter’s performance and are not recommended.
Excessive voltage differences between VOUT and Sense, in conjunction with trim
adjustment of the output voltage, can cause the overvoltage protection circuitry
to activate (see Performance Specifications for overvoltage limits).
Temperature/power derating is based on maximum output current and
voltage at the converter's output pins. Use of the trim and sense functions can
cause output voltages to increase, thereby increasing output power beyond
the UVQ's specified rating, or cause output voltages to climb into the output
overvoltage region. Therefore:
(VOUT at pins) x (IOUT)
≤ rated output power
The Trim pin (pin 6) is a relatively high impedance node that can be sus-
ceptible to noise pickup when connected to long conductors in noisy environ-
ments. In such cases, a 0.22F capacitor to –Output can be added to reduce
this long lead effect.
UVQ Series Aluminum Heatsink
The UVQ series converter baseplate can be attached either to an enclosure wall
or a heatsink to remove heat from internal power dissipation. The discussion
below concerns only the heatsink alternative. The UVQ’s are available with a
low-profile extruded aluminum heatsink kit, models HS-QB25-UVQ, HS-QB50-
UVQ, and HS-QB100-UVQ. This kit includes the heatsink, thermal mounting
pad, screws and mounting hardware. See the assembly diagram below. Do not
overtighten the screws in the tapped holes in the converter. This kit adds excel-
lent thermal performance without sacrificing too much component height. See
the Mechanical Outline Drawings for assembled dimensions. If the thermal pad
is firmly attached, no thermal compound (“thermal grease”) is required.
MDC_UVQ Models.B04 Page 12 of 25
UVQ Series
Low Profile, Isolated Quarter Brick
2.5–40 Amp DC/DC Converters
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UVQ-2.5/35-D24N | 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 2.5V 35A 87.5W 8-Pin Quarter-Brick |
| UVQ-2.5/35-D24NB-C | 功能描述:DC/DC转换器 87.5W 24V - 2.5V 35A NEG POL BASEPLATE 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: |
| UVQ-2.5/35-D24N-C | 功能描述:DC/DC转换器 87.5W 24V - 2.5V 35A NEGATIVE 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: |
| UVQ-2.5/35-D24P | 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 2.5V 35A 87.5W 8-Pin Quarter-Brick |
| UVQ-2.5/35-D24PB-C | 功能描述:DC/DC转换器 87.5W 24V - 2.5V 35A POS POL BASEPLATE 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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