Rev. 3.1

2/2011

Page 4 of 18

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

vicorpower.com

x 120

025A00

y

E

48

VTM

SIGNAL TYPE

STATE

ATTRIBUTE

SYMBOL

CONDITIONS / NOTES

MIN

TYP

MAX UNIT

TM voltage

2.95

3.00

3.05

V

ANALOG

TM source current

100

µA

OUTPUT

Steady

TM gain

10

mV/°C

TM voltage ripple

120

200

mV

Disable

TM voltage

0V

DIGITAL OUTPUT

TM resistance (internal)

Internal pull down resistor

25

40

50

k

Ω

Transitional

TM capacitance (external)

50

pF

(FAULT FLAG)

TM fault response time

From fault to TM = 1.5 V

10

µs

• The TM pin monitors the internal temperature of the VTM controller IC

within an accuracy of ±5°C.

• Can be used as a "Power Good" flag to verify that the VTM is operating.

• The TM pin has a room temperature setpoint of 3 V

and approximate gain of 10 mV/°C.

• Output drives Temperature Shutdown comparator

TEMPERATURE MONITOR : TM

4.0 TIMING DIAGRAM

12

7

2. Controller start

6. Overcurrent

7. Start up on short circuit

8. PC driven low

PC

3 V

VC

NL

5 V

TM

c

Notes:

– Timing and voltage is not to scale

– Error pulse width is load dependent

a: VC slew rate (dVC/dt)

b: Minimum VC pulse rate

d

3

45

6

a

b

8

g

e

f

≥ 26 V