PRM48AY480X400A00 Datasheet, PDF (12/44 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).
TRIM (Adaptive Loop Operation Only)
• Provides dynamic trim control over the PRM output voltage in Adaptive Loop Operation
• Sampled prior to every start up to detect if trim is active or inactive
• Output voltage is equal to 20 times the voltage at the TRIM pin when applied TRIM voltage is within the active range
• Trim state is detected during normal operation and cannot be changed until start up is initiated
Signal Type
State
Attribute
Symbol
Conditions / Notes
Min
Typ
Trim Enable Threshold
V_{TRIM_EN}
Pull below this value during
start up to enable trim control
3.10
Trim Disable Threshold
V_{TRIM_DIS}
Pull above this value during
start up to disable trim control
Start up Minimum Trim Disable
Minimum TRIM resistance required
R_{TRIM_DIS_MIN}
10
Resistance
to disable trim
Trim Capacitance
(External)
C_{TRIM_EXT}
Analog Input
Trim Sample Delay
t_{ENABLE_TRIM} From ENABLE high to TRIM sampled 100
140
TRIM Pin
Analog Range
V_{TRIM_RANGE} See Figure 26
1.00
TRIM Gain
G_TRIM
V_OUT / V_TRIM,
20
V_TRIM applied within active range
Normal
Vout accuracy, exclusive of
Operation Trim Accuracy
%_{ACC_TRIM}
0.5
external resistor tolerance
V_OUT Referred
Trim Resolution
V_{OUT_RES}
200
Trim Latency
t_{TRIM_LAT}
60
120
Trim Bandwidth
BW_TRIM -3dB point
1.2
Max
Unit
V
3.20
V
MΩ
100
pF
200
µs
2.75
V
V/V
2.0
%
mV
240
µs
kHz
PRM^TM Regulator
Page 12 of 44
Rev 1.4
11/2015
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