PRM48BH480T250A00 Datasheet, PDF (13/44 Pages) Vicor Corporation – PRM™ Regulator

PRM48BH480 X 250A00
SHARE / CONTROL NODE
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
Analog Output
Analog Input
State
Standalone /
Master
Operation
Slave
Operation
Attribute
SHARE Voltage Active
Range
SHARE Available
Current
SHARE Resistance to
SGND
SHARE Sink Current
Symbol
V_SHARE
I_SHARE
R_SHARE
I_{SHARE_SINK}
Conditions / Notes
V_SHARE > 0.79V
V_SHARE > 0.79V
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 0.79V when pulled below active range
Signal Type
Analog Input
State
Regular
Operation
Attribute
CONTROL NODE
Voltage Active Range
CONTROL NODE
Source Current
CONTROL NODE Sink
Current
CONTROL NODE
Resistance to SGND
Symbol
V_CN
I_{CN_LOW}
I_{CN_SINK}
R_CN
Conditions / Notes
V_CN < 0.79V
V_CN > 0.79V
Min
Typ
0.79
2.5
93.3
0.25
0.50
Max
Unit
7.40
V
mA
kΩ
0.75
mA
Min
Typ
0.79
0.25
0.50
93.3
Max
Unit
7.40
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 shutdown, detected after t_BLNK
•Not used for Adaptive Loop operation
Signal Type
State
Attribute
Current Limit (clamp)
Threshold
Symbol
V_{IFB_IL}
Conditions / Notes
V_IN = 48V V; V_OUT = 48V T_INT = 25 °C
Over Line, Trim, and Temperature
Min
Typ
1.90
2.00
1.85
Max
Unit
2.10
V
2.15
V
Analog Input
Regular
Operation
Overcurrent Protection
Threshold
V_{IFB_OC}
Not Production Tested; Guaranteed by Design; T_INT = 25 °C
2.58
2.69
2.80
V
Not Production Tested; Guaranteed by Design; Over Line,
Trim, and Temperature
2.09
2.17
V
IFB Input Impedance
Current Limit Bandwidth
R_IFB
BW_IL
2.09
2.13
2.0
2.17
kΩ
kHz
• Reserved for factory use only
• No connections should be made to these pins
NC: NO CONNECT
- 13 -
Rev. 1.0
11/2012