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参数资料
| 型号： | QM48S40033-NS00 |
| 厂商： | Power-One |
| 文件页数： | 5/13页 |
| 文件大小： | 0K |
| 描述： | DC/DC QTR BRICK 132W 3.3V SMD |
| 标准包装： | 125 |
| 系列： | * |
QM48S40033 DC-DC Converter Data Sheet
36-75 VDC Input; 3.3 VDC @ 40A Output
When using remote sense, the output voltage at the con-
QmaX
Series
verter can be increased by as much as 10% above the
nominal rating in order to maintain the required voltage
across the load. Therefore, the designer must, if necessary,
decrease the maximum current (originally obtained from the
derating curves) by the same percentage to ensure the con-
Vin
Vin (+)
ON/OFF
TM
Converter
(Top View)
Vout (+)
SENSE (+)
TRIM
SENSE (-)
R T-INCR
Rload
verter’s actual output power remains at or below the maxi-
mum allowable output power.
Vin (-)
Vout (-)
Output Voltage Adjust /TRIM (Pin 6)
The output voltage can be adjusted up 10% or down 20%
relative to the rated output voltage by the addition of an ex-
ternally connected resistor. Trim up to 10% is guaranteed
Fig. C: Configuration for increasing output voltage .
To decrease the output voltage (Fig. D), a trim resistor,
R T-DECR , should be connected between the TRIM (Pin 6) and
SENSE(-) (Pin 5), with a value of:
only at Vin ≥ 40 V, and it is marginal (8% to 10%) at Vin =
36 V.
R T ? DECR =
511
| ? |
? 10.22 [k ? ]
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 SENSE(-) pins.
To increase the output voltage, refer to Fig. C. A trim resis-
tor, R T-INCR , should be connected between the TRIM (Pin 6)
and SENSE(+) (Pin 7), with a value of:
where,
R T ? DECR = Required value of trim-down resistor [k ? ]
and ? is as defined above.
Note: The above equations for calculation of trim resistor
values match those typically used in conventional industry-
R T ? INCR =
5.11(100 + ? )V O ? NOM ? 626
1.225 ?
? 10.22 [k ? ]
standard quarter bricks. For more information see Applica-
tion Note 103.
where,
? =
(V O - REQ ? V O - NOM )
QmaX
Series
R T ? INCR = Required value of trim-up resistor k ? ]
V O ? NOM = Nominal value of output voltage [V]
X 100 [%]
V O - NOM
Vin
Vin (+)
ON/OFF
Vin (-)
TM
Converter
(Top View)
Vout (+)
SENSE (+)
TRIM
SENSE (-)
Vout (-)
R T-DECR
Rload
V O ? REQ = Desired (trimmed) output voltage [V].
When trimming up, care must be taken not to exceed the
converter‘s maximum allowable output power. See previous
section for a complete discussion of this requirement.
Fig. D: Configuration for decreasing output voltage.
Trimming/sensing beyond 110% of the rated output voltage
is not an acceptable design practice, as this condition could
cause unwanted triggering of the output over-voltage protec-
tion (OVP) circuit. The designer should ensure that the dif-
ference between the voltages across the converter’s output
pins and its sense pins does not exceed 0.33 V, or:
[V OUT ( + ) ? V OUT ( ? )] ? [V SENSE ( + ) ? V SENSE ( ? )] ≤ 0.33 [V]
This equation is applicable for any condition of output sens-
ing and/or output trim.
FEB 10, 2004 revised to NOV 13, 2006
Page 5 of 13
www.power-one.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QM48S40033-NS00A | 制造商:Power-One 功能描述: |
| QM48S40033-NS00G | 功能描述:DC/DC转换器 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: |
| QM48S40033-NS0P | 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 3.3V 40A 132W 8PIN QUARTER-BRICK - Bulk |
| QM48S40033-NS0PG | 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 3.3V 40A 132W 8PIN QUARTER-BRICK - Bulk |
| QM48S40033-PS00 | 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 3.3V 40A 132W - Bulk |
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