Datasheet > QM48T45012-NBCTG

QM48T45012-NBCTG

更新时间： 2023-08-15 00:00:00

品牌	Logo	应用领域
BEL		/
页数	文件大小	规格书
37页	644K
描述
DC-DC Regulated Power Supply Module, 1 Output, Hybrid

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QM48T45012-NBCTG 数据手册

QM48 Series - 45A

Data Sheet

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.

QmaX^TMSeries

Converter

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

(Top View)

R _T-INCR

Rload

Vin

SENSE (-)

Vout (-)

Fig. C: Configuration for increasing output voltage.

Output Voltage Adjust /TRIM (Pin 6)

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:

The output voltage can be adjusted up 10% or down 20% for

Vout ≥ 1.5 V, and ±10% for Vout = 1.2 V and 1.0 V relative

to the rated output voltage by the addition of an externally

connected resistor. For 3.3 V output voltage, trim up to 10%

is guaranteed only at Vin ≥ 40 V, and it is marginal (8% to

10%) at Vin = 36 V.

511

RT−DECR

−10.22 [kΩ] (3.3 - 1.5 V)

− 15 [kΩ] (1.2 V)

| ∆ |

700

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.

| ∆ |

700

− 17 [kΩ] (1.0 V)

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,

RT−DECR = Required value of trim-down resistor [kΩ]

and ∆ is as defined above.

5.11(100 + ∆)V^O^−NOM− 626

T−INCR

− 10.22 [kΩ] (3.3 -1.5V)

1.225∆

Note: The above equations for calculation of trim resistor

values match those typically used in conventional industry-

standard quarter bricks (except for 1.2V and 1.0 V outputs).

84.6

T−INCR

− 7.2 [kΩ] (1.2 V)

∆

Converters with output voltages 1.2 V and 1.0 V are avail-

able with alternative trim feature to provide the customers

with the flexibility of second sourcing. For these converters,

the last character in the part number is “T”. The trim equa-

tions of “T” version of converters and more information can

be found in Application Note 103.

120

− 9 [kΩ] (1.0 V)

∆

where,

RT−INCR = Required value of trim-up resistor kΩ]

VO−NOM = Nominal value of output voltage [V]

^TMSeries

Converter

QmaX

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

(V^O-REQ− V^O-NOM)

∆ =

X 100 [%]

(Top View)

V^{O -NOM}

Rload

Vin

R_T-DECR

SENSE (-)

Vout (-)

VO−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.

QM48T45 Family DS Ver 3 03-27-03

USA Toll Free 866 WOW-didt

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