Rev. 1.7
1/2011
Page 3 of 17
V•I CHIP CORP. (A VICOR COMPANY) 25 FRONTAGE RD. ANDOVER, MA 01810 800-735-6200
vicorpower.com
VTM48EF012T130A00
SIGNAL TYPE STATE ATTRIBUTE SYMBOL CONDITIONS / NOTES MIN TYP MAX UNIT
External VC voltage V
VC_EXT
Required for start up, and operation
11.5 16.5 V
below 26 V. See Section 7.
VC = 11.5 V, V
IN
= 0 V 115 150
VC current draw I
VC
VC = 11.5 V, V
IN
> 26 V 0
mA
VC = 16.5 V, V
IN
> 26 V 0
Steady
Fault mode. VC > 11.5 V 60
ANALOG
VC internal diode rating D
VC_INT
100 V
INPUT
VC internal resistor R
VC-INT
N/A kΩ
VC internal resistor
T
VC_COEFF
N/A ppm/°C
temperature coefficient
Start Up
VC start up pulse V
VC_SP
Tpeak <18 ms 20 V
VC slew rate dVC/dt Required for proper start up; 0.02 0.25 V/µs
VC inrush current I
INR_VC
VC = 16.5 V, dVC/dt = 0.25 V/µs 1 A
VC to V
OUT
turn-on delay T
ON
V
IN
pre-applied, PC floating,
500 µs
VC enable, C
PC
= 0 µF
Transitional
VC to PC delay T
vc_pc
VC = 11.5 V to PC high, V
IN
= 0 V,
75 125 µs
dVC/dt = 0.25 V/µs
Internal VC capacitance C
VC_INT
VC = 0 V 3.2 µF
• Used to wake up powertrain circuit.
• A minimum of 11.5 V must be applied indefinitely for V
IN
< 26 V
to ensure normal operation.
• VC slew rate must be within range for a succesful start.
• PRM VC can be used as valid wake-up signal source.
• Internal Resistance used in “Adaptive Loop” compensation
• VC voltage may be continuously applied
VTM CONTROL : VC
3.0 SIGNAL 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
= 25°C unless otherwise noted.
SIGNAL TYPE STATE ATTRIBUTE SYMBOL CONDITIONS / NOTES MIN TYP MAX UNIT
PC voltage V
PC
4.7 5 5.3 V
ANALOG
Steady
PC source current I
PC_OP
2mA
OUTPUT
PC resistance (internal) R
PC_INT
Internal pull down resistor 50 150 400 kΩ
Start Up
PC source current I
PC_EN
50 100 300 µA
PC capacitance (internal) C
PC_INT
Section 7 1000 pF
PC resistance (external) R
PC_S
60 kΩ
Enable
PC voltage V
PC_EN
2 2.5 3 V
DIGITAL
Disable
PC voltage (disable) V
PC_DIS
2 V
INPUT / OUPUT
PC pull down current I
PC_PD
5.1 mA
Transitional
PC disable time T
PC_DIS_T
5µs
PC fault response time T
FR_PC
From fault to PC = 2 V 100 µs
• The PC pin enables and disables the VTM.
When held below 2 V, the VTM will be disabled.
• PC pin outputs 5 V during normal operation. PC pin is equal to 2.5 V
during fault mode given V
IN
> 26 V or VC > 11.5 V.
• After successful start up and under no fault condition, PC can be used as
a 5 V regulated voltage source with a 2 mA maximum current.
• Module will shutdown when pulled low with an impedance
less than 400 Ω.
• In an array of VTMs, connect PC pin to synchronize start up.
• PC pin cannot sink current and will not disable other modules
during fault mode.
PRIMARY CONTROL : PC
SIGNAL TYPE STATE ATTRIBUTE SYMBOL CONDITIONS / NOTES MIN TYP MAX UNIT
IM Voltage (No Load) V
IM_NL
T
J
= 25ºC, V
IN
= 40 V, I
OUT
= 0 A 0.1 0.15 0.3 V
IM Voltage (50%) V
IM_
50%
T
J
= 25ºC, V
IN
= 40 V, I
OUT
= 65 A 0.75 V
ANALOG
Steady
IM Voltage (Full Load) V
IM_FL
T
J
= 25ºC, V
IN
= 40 V, I
OUT
= 130 A 1.53 V
OUTPUT
IM Gain A
IM
T
J
= 25ºC, V
IN
= 40 V, I
OUT
> 65 A 12 mV/A
IM Resistance (External) R
IM_EXT
2.5 MΩ
• The IM pin voltage varies between 0.1 V and 1.53 V representing the
output current within ±25% under all operating line temperature
conditions between 50% and 100%.
• The IM pin provides a DC analog voltage proportional to
the output current of the VTM.
CURRENT MONITOR : IM
