Datasheet > QM48T45010-PAB0G

QM48T45010-PAB0G

更新时间： 2023-07-15 00:00:00

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BEL		/
页数	文件大小	规格书
36页	584K
描述
DC-DC Regulated Power Supply Module, 1 Output, 150W, Hybrid, ROHS COMPLIANT, QUARTER BRICK PACKAGE-8

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QM48T45010-PAB0G 数据手册

QM48T45 Family DC-DC Converter Data Sheet

36-75 VDC Input; 1.0-3.3 VDC @ 45 A Output

current (originally obtained from the derating curves)

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:

by the same percentage to ensure the converter’s

actual output power remains at or below the

maximum allowable output power.

511

RT−DECR

−10.22

− 15

[kꢀ] (3.3-1.5 V)

[kꢀ] (1.2 V)

| Δ |

Output Voltage Adjust /TRIM (Pin 6)

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.

700

| Δ |

700

− 17

[kꢀ] (1.0 V)

| Δ |

where,

The TRIM pin should be left open if trimming is not

being used. To minimize noise pickup, a 0.1µF

capacitor is connected internally between the TRIM

and SENSE(-) pins.

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

and Δ is defined above.

Note:

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:

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).

5.11(100 + Δ)V^O^−NOM− 626

RT−INCR

− 10.22

[kꢀ]

1.225Δ

QmaX^TM^Series

Vin(+)

ON/OFF

Vin(-)

Vout(+)

SENSE(+)

TRIM

(For 3.3-1.5 V)

Converter

(Top View)

84.6

Rload

T−INCR

− 7.2

− 9

[kꢀ] (1.2 V)

[kꢀ] (1.0 V)

Vin

R_{T- DECR}

SENSE(-)

Vout (-)

120

T−INCR

where,

Fig. D: Configuration for decreasing output voltage.

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

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

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:

(V^O-REQ− V^O-NOM)

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.

QmaX^TM^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.

MCD10073 Rev. 1.0

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