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参数资料
| 型号： | QL48T30012-NBA0 |
| 厂商： | Power-One |
| 文件页数： | 6/14页 |
| 文件大小： | 0K |
| 描述： | DC/DC QTR BRICK 36W 1.2V OUT T/H |
| 标准包装： | 100 |
| 系列： | * |
QL48T30012 DC-DC Converter Data Sheet
36-75 VDC Input; 1.2 VDC @ 30A Output
R T ? INCR =
When using remote sense, the output voltage at the con-
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-
verter’s actual output power remains at or below the maxi-
mum allowable output power.
R T ? DECR = Required value of trim-down resistor [k Ω ]
and Δ is as defined above.
Converters are also available with alternative trim equations,
to provide the customers with the flexibility of second sourc-
ing:
485
Δ
Output Voltage Adjust /TRIM (Pin 6)
The converter’s output voltage can be adjusted up 10% or
R T ? DECR =
511
| Δ |
? 10.22
down 10% relative to the rated output voltage by the addition
of an externally connected resistor. For detailed description
of the trim feature and pre-calculated trimming resistor val-
ues, see Application Note 103.
For these converters, the last character in the part number is
“T”.
Q Family
The TRIM pin should be left open if trimming is not being
used. To minimize noise pickup, a 0.1 μF capacitor is con-
nected internally between the TRIM and SENSE(-) pins.
To increase the output voltage, refer to Fig. 4. A trim resistor,
Vin
Vin (+)
ON/OFF
TM
Converter
(Top View)
Vout (+)
SENSE (+)
TRIM
SENSE (-)
R T-INCR
Rload
R T-INCR , should be connected between the TRIM (Pin 6) and
SENSE(+) (Pin 7), with a value of:
Vin (-)
Vout (-)
R T ? INCR =
84.6
Δ
? 7.2 [k Ω ]
Fig. 4: Configuration for increasing output voltage .
where,
Q Family
R T ? INCR = Required value of trim-up resistor k Ω ]
V O ? NOM = Nominal value of output voltage [V]
Vin (+)
TM
Converter
(Top View)
Vout (+)
SENSE (+)
Δ =
(V O -REQ ? V O -NOM )
V O - NOM
X 100 [%]
Vin
ON/OFF
Vin (-)
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.
To decrease the output voltage (Fig. 5), a trim resistor,
R T-DECR , should be connected between the TRIM (Pin 6) and
SENSE(-) (Pin 5), with a value of:
Fig. 5: 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 0.12 V, or:
R T ? DECR =
where,
700
| Δ |
? 15 [k Ω ]
[V OUT ( + ) ? V OUT ( ? )] ? [V SENSE ( + ) ? V SENSE ( ? )] ≤ 0.12 [V]
This equation is applicable for any condition of output sens-
ing and/or output trim.
MAR 26, 2003 revised to NOV 13, 2006
Page 6 of 14
www.power-one.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QL48T30012-NBA0G | 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 1.2V 30A - Bulk |
| QL48T30012-NBAP | 制造商:Power-One 功能描述:DCDC - Bulk |
| QL48T30012-NBAPG | 制造商:Power-One 功能描述:DCDC,HAZMAT - Bulk |
| QL48T30012-NBB0 | 功能描述:CONV DC-DC 48V IN 1.2V OUT 36W RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:QL48 标准包装:5 系列:* |
| QL48T30012-NBBP | 制造商:Power-One 功能描述:DCDC - Bulk |
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