Datasheet > QME48T40012-NGBL

QME48T40012-NGBL

更新时间： 2023-02-26 14:58:20

品牌	Logo	应用领域
BEL		/
页数	文件大小	规格书
35页	571K
描述
DC-DC Regulated Power Supply Module, 1 Output, Hybrid

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QME48T40012-NGBL 数据手册

QME48T40 DC-DC Series Data Sheet

36-75 VDC Input; 1.0-3.3 VDC @ 40A Output

actual output power remains at or below the

maximum allowable output power.

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:

Output Voltage Adjust /TRIM (Pin 6)

511

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.

TDECR



10.22

15

[kꢀ]

(3.3 – 1.5 V)

(1.2 V)

| Δ |

700

[kꢀ]

The TRIM pin should be left open if trimming is not

being used. To minimize noise pickup, a 0.1 µF

capacitor is connected internally between the TRIM

and SENSE(-) pins.

| Δ |

700

17

[kꢀ]

(1.0 V)

| Δ |

To increase the output voltage, refer to Fig. C. A trim

resistor, 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 [kꢀ]

and Δ is defined above.

5.11(100  Δ)V^ONOM 626

RTINCR



10.22

[kꢀ],

1.225Δ

Note:

The above equations for calculation of trim resistor values match

those typically used in conventional industry-standard quarter-bricks

(except for 1.2 V and 1.0 V outputs).

for 3.3 – 1.5 V.

84.6

TINCR



 7.2

[kꢀ]

(1.2 V)

QME Series

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

Converter

120

TINCR

 9

(1.0 V)

(Top View)

Rload

Vin

R_T-DECR

SENSE (-)

Vout (-)

where,

RTINCR  Required value of trim-up resistor kꢀ]

VONOM  Nominal value of output voltage [V]

Fig. D: Configuration for decreasing output voltage.

(V^O-REQ V^O-NOM)

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 overvoltage protection (OVP) circuit. The

designer should ensure that the difference between

the voltages across the converter’s output pins and its

sense pins does not exceed 10% of V_OUT(NOM), or:

Δ 

X 100

[%]

V^O-NOM

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 the previous section for a complete discussion

of this requirement.

[V]

[VOUT() VOUT()][VSENSE() VSENSE()]  VO - NOMX10%

This equation is applicable for any condition of output

sensing and/or output trim.

QME Series

Vin (+)

ON/OFF

Vin (-)

Vout (+)

SENSE (+)

TRIM

Converter

(Top View)

R_T-INCR

Rload

Vin

SENSE (-)

Vout (-)

Fig. C: Configuration for increasing output voltage.

ZD-02057 Rev. 4.2.1, 23-Feb-10

www.power-one.com

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