PRM48BY480X500A00 Datasheet, PDF (15/44 Pages) Vicor Corporation – High Efficiency Converter

PRM48By480x500A00
Signal Specifications (cont.)
Specifications apply over all line and load conditions, T_INT = 25ºC and output voltage from 20.0 V to 55.0 V, unless otherwise noted.
Boldface specifications apply over the temperature range of -40ºC < T_INT < 125ºC (T-grade).
REF_EN: Reference Enable (Remote Sense and Slave Operation Only)
• Functions as REF_EN pin in Remote Sense and Slave Operation
• REF_EN signals successful start up and powertrain ready to operate
• Intended to power and enable the external feedback circuit reference in Remote Sense Operation
• 3.25 V, 4 mA regulated voltage source
Signal Type
State
Attribute
Symbol
Conditions / Notes
Min
Analog Output
REF_EN Voltage
REF_EN Source
Normal
Operation
Impedance
REF_EN Current
REF_EN Capacitance
(External)
V_{REF_EN} REF_EN unloaded
R_{OUT_REF_EN}
I_{REF_EN}
C_{REF_EN_EXT}
2.72
REF_EN Voltage Ripple V_{REF_EN_PP} Includes burst mode, 20 MHz BW
Transition
ENABLE to REF_EN
Delay
VAUX to REF_EN
Delay
t_{ENABLE_REF_EN} ENABLE low to REF_EN low
t_{VAUX_REF_EN} VAUX = 8.1 V to REF_EN high
Typ
3.25
50
25
120
1
Max
3.37
100
4
0.1
Unit
V
Ω
mA
µF
mV
µs
ms
Share (Adaptive Loop and Slave Operation Only)
• Functions as SHARE pin in master slave array configuration
• Current share bus for array operation (master/slave scheme)
• Sources current and provides SHARE signal in master operation
• Sinks constant current when externally driven in active range (Slave Operation)
Signal Type
State
Attribute
Symbol
Conditions / Notes
Analog Output
SHARE Voltage
Active Range
Standalone/
SHARE Available
Master
Current
Operation
SHARE Resistance
to SGND
V_SHARE
I_SHARE
V_SHARE > 0.79 V
R_SHARE
Analog Input
Slave
Operation ^{SHARE Sink Current}
I_{SHARE_SINK} V_SHARE > 0.79 V
Min
Typ
Max Unit
0.79
7.40
V
2.5
mA
93.3
kΩ
0.25
0.50
0.75
mA
PRM^TM Regulator
Page 15 of 44
Rev 1.4
11/2015
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