LX1665A Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1665A Datasheet PDF : 17 Pages
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PRODUCT DATABOOK 1996/1997
LX1664/64A, LX1665/65A
DUAL OUTPUT PWM CONTROLLERS WITH 5-BIT DAC
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Table 1 - Adaptive Transient Voltage Output (Output Voltage Setpoint Typical)
Processor Pins
0 = Ground, 1 = Open (Floating)
Output Voltage (VCC_CORE)
VID4 VID3 VID2 VID1 VID0
0.0A
Nominal Output*
0
1
1
1
1
1.34V
1.30V
0
1
1
1
0
1.39V
1.35V
0
1
1
0
1
1.44V
1.40V
0
1
1
0
0
1.49V
1.45V
0
1
0
1
1
1.54V
1.50V
0
1
0
1
0
1.59V
1.55V
0
1
0
0
1
1.64V
1.60V
0
1
0
0
0
1.69V
1.65V
0
0
1
1
1
1.74V
1.70V
0
0
1
1
0
1.79V
1.75V
0
0
1
0
1
1.84V
1.80V
0
0
1
0
0
1.89V
1.85V
0
0
0
1
1
1.94V
1.90V
0
0
0
1
0
1.99V
1.95V
0
0
0
0
1
2.04V
2.00V
0
0
0
0
0
2.09V
2.05V
1
1
1
1
1
2.04V
2.00V
1
1
1
1
0
2.14V
2.10V
1
1
1
0
1
2.24V
2.20V
1
1
1
0
0
2.34V
2.30V
1
1
0
1
1
2.44V
2.40V
1
1
0
1
0
2.54V
2.50V
1
1
0
0
1
2.64V
2.60V
1
1
0
0
0
2.74V
2.70V
1
0
1
1
1
2.84V
2.80V
1
0
1
1
0
2.94V
2.90V
1
0
1
0
1
3.04V
3.00V
1
0
1
0
0
3.14V
3.10V
1
0
0
1
1
3.24V
3.20V
1
0
0
1
0
3.34V
3.30V
1
0
0
0
1
3.44V
3.40V
1
0
0
0
0
3.54V
3.50V
* Nominal = DAC setpoint voltage with no adaptive output voltage positioning.
Note:
Adaptive Transient Voltage Output
In order to improve transient response a 40mV
offset is built into the Current Sense comparator.
At high currents, the peak output voltage will be
lower than the nominal set point, as shown in
Figure 1. The actual output voltage will be a
function of the sense resistor, the output current
and output ripple.
Time - 100µs/Div.
FIGURE 1 — Output Transient Response
(using 5mΩ sense resistor and 5µH output inductor)
4
Copyright © 1999
Rev. 1.2 11/99
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