PRM48AY480X400A00 Datasheet, PDF (16/44 Pages) Vicor Corporation – High Efficiency Converter

PRM48Ay480x400A00
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).
Control Node (Remote Sense Operation Only)
• Functions as CONTROL NODE pin in Remote Sense Operation
• Modulator control node voltage sets power train timing
• Driven by external error amplifier in Remote Sense Operation
• Sinks constant current when externally driven in active range
• Sources current, and clamps voltage to 0.79 V when pulled below active range
Signal Type
State Attribute
Symbol
Conditions / Notes
CONTROL NODE
V_CN
Voltage Active Range
Analog Input
CONTROL NODE
Normal Source Current
Operation CONTROL NODE
Sink Current
I_{CN_LOW}
I_{CN_SINK}
V_CN < 0.79 V
V_CN > 0.79 V
CONTROL NODE
Resistance to SGND
R_CN
Min
Typ
0.79
0.25
0.50
93.3
Max
7.40
Unit
V
2.5
mA
0.75
mA
kΩ
IFB: Current Feedback (Remote Sense Operation Only)
• Functions as IFB pin in Remote Sense Operation
• A voltage proportional to the PRM output current must be supplied externally to the IFB pin in order for the device to properly protect overcurrent events
and to enable output current limit (clamp)
• Overcurrent protection trip will cause instantaneous powertrain disable, detected after t_BLANK
• Not used for Adaptive Loop Operation
Signal Type
State
Attribute
Symbol
Conditions / Notes
Min
Typ
Max Unit
Current Limit (Clamp)
V_IN = 48.0 V; V_OUT = 48.0 V
1.90
2.00
2.10
V
Threshold
V_{IFB_IL}
T_INT = 25°C
Over line, trim, and temperature
1.85
2.15
V
Analog Input
Normal
Operation
Overcurrent
Protection
Threshold
Not production tested; guaranteed
2.58
2.69
2.80
V
by design; T_INT = 25°C
V_{IFB_OC}
Not production tested; guaranteed
by design; over line, trim,
2.56
2.82
V
and temperature
IFB Input Impedance
R_IFB
2.09
2.13
2.17
kΩ
Current Limit
Bandwidth
BW_IL
2.0
kHz
• Reserved for factory use only
• No connections should be made to these pins
NC: No Connect
PRM^TM Regulator
Page 16 of 44
Rev 1.4
11/2015
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