VTM48ET120M025A00【PDF 2/18 页】VTM CURRENT MULTIPLIER 12V 25A

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VTM 48 E x 120 y 025A00

1.0 ABSOLUTE MAXIMUM VOLTAGE RATINGS

The absolute maximum ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent

damage to the device.

+ IN to - IN . . . . . . . . . . . . . . . . . . . . . . .

PC to - IN . . . . . . . . . . . . . . . . . . . . . . . .

TM to -IN . . . . . . . . . . . . . . . . . . . . . . . .

MIN

-1.0

-0.3

-0.3

MAX

60

20

7

UNIT

V DC

V DC

V DC

+ IN / - IN to + OUT / - OUT (hipot) ........

+ IN / - IN to + OUT / - OUT (working) ...

MIN

MAX

2250

60

UNIT

V DC

V DC

VC to - IN . . . . . . . . . . . . . . . . . . . . . . . .

-0.3

20

V DC

+ OUT to - OUT .......................................

-1.0

16

V DC

2.0 ELECTRICAL CHARACTERISTICS

Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature

range of -40°C < T J < 125°C (T-Grade) ; All other specifications are at T J = 25oC unless otherwise noted.

ATTRIBUTE

Input voltage range

SYMBOL

V IN

CONDITIONS / NOTES

No external VC applied

VC applied

MIN

26

0

TYP

MAX

55

55

UNIT

V DC

V IN slew rate

dV IN /dt

1

V/μs

V IN UV turn off

V IN _ UV

Module latched shutdown,

No external VC applied, I OUT = 25A

24

26

V

V IN = 48 V

3

15

No Load power dissipation

P NL

V IN = 26 V to 55 V

V IN = 48 V, T C = 25oC

5.3

17

6.5

W

V IN = 26 V to 55 V, T C = 25oC

9

Inrush current peak

DC input current

Transfer ratio

Output voltage

Output current (average)

Output current (peak)

Output power (average)

I INRP

I IN _ DC

K

V OUT

I OUT _ AVG

I OUT _ PK

P OUT _ AVG

VC enable, V IN = 48 V, C OUT = 1000 μF,

R LOAD = 471 m Ω

K = V OUT / V IN , I OUT = 0 A

V OUT = V IN ? K - I OUT ? R OUT , Section 11

T PEAK < 10 ms, I OUT _ AVG ≤ 25 A

I OUT _ AVG ≤ 25 A

10

1/4

20

7

25

37.5

300

A

A

V/V

V

A

A

W

Efficiency (ambient)

η AMB

V IN = 48 V, I OUT = 25 A

V IN = 26 V to 55 V, I OUT = 25 A

95.0

93.5

96.0

%

Efficiency (hot)

Efficiency (over load range)

Output resistance (cold)

Output resistance (ambient)

Output resistance (hot)

η HOT

η 20%

R OUT _ COLD

R OUT _ AMB

R OUT _ HOT

V IN = 48 V, I OUT = 12.5 A

V IN = 48 V, T C = 100°C, I OUT = 25 A

5 A < I OUT < 25 A

T C = -40°C, I OUT = 25 A

T C = 25°C, I OUT = 25 A

T C = 100°C, I OUT = 25 A

94.5

94.5

80

4.9

6.3

8.8

95.5

95.6

6.7

9.0

11.5

9.0

13.4

14.0

%

%

m Ω

m Ω

m Ω

Switching frequency

Output ripple frequency

Output voltage ripple

F SW

F SW _ RP

V OUT _ PP

C OUT = 0 F, I OUT = 25 A, V IN = 48 V,

20 MHz BW, Section 12

1.85

3.70

1.95

3.90

150

2.05

4.10

285

MHz

MHz

mV

Output inductance (parasitic)

Output capacitance (internal)

Output capacitance (external)

L OUT _ PAR

C OUT _ INT

C OUT _ EXT

Frequency up to 30 MHz,

Simulated J-lead model

Effective Value at 12 V OUT

VTM Standalone Operation.

V IN pre-applied, VC enable

600

47

1000

pH

μF

μF

PROTECTION

Overvoltage lockout

Overvoltage lockout

response time constant

Output overcurrent trip

V IN _ OVLO +

T OVLO

I OCP

Module latched shutdown

Effective internal RC filter

55.1

26

58.5

8

39

60

55

V

μs

A

Short circuit protection trip current

I SCP

26

A

Output overcurrent

response time constant

Short circuit protection response time

T OCP

T SCP

Effective internal RC filter (Integrative).

From detection to cessation

of switching (Instantaneous)

5.3

1

ms

μs

Thermal shutdown setpoint

T J _ OTP

125

130

135

oC

Reverse inrush current protection

Reverse Inrush protection disabled for this product

Rev. 3.1

V?I CHIP CORP. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200

2/2011

Page 2 of 18

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