LX1665 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX1665 Datasheet PDF : 17 Pages
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PRODUCT DATABOOK 1996/1997
LX1664/1664A, LX1665/65A
DUAL OUTPUT PWM CONTROLLERS WITH 5-BIT DAC
PRODUCTION DATA SHEET
CHARACTERISTICS CURVES
95
90
85
80
Output Set Point
EFFICIENCY AT 3.1V
75
EFFICIENCY AT 2.8V
EFFICIENCY AT 1.8V
70
1 2 3 4 5 6 7 8 9 10 11 12 13 14
IOUT (A)
FIGURE 2 — Efficiency Test Results:
Non-Synchronous Operation, V = 5V
IN
100
95
90
85
80
Output Set Point
EFFICIENCY AT 3.1V
75
EFFICIENCY AT 2.8V
EFFICIENCY AT 1.8V
70
1 2 3 4 5 6 7 8 9 10 11 12 13 14
IOUT (A)
FIGURE 3 — Efficiency Test Results:
Synchronous Operation, V = 5V
IN
90
85
80
75
70
Output Set Point
1.8V EFFICIENCY
65
2.8V EFFICIENCY
3.3V EFFICIENCY
60
1
2
3
4
5
6
7
8
9 10 11 12 13 14
IOUT (A)
FIGURE 4 — Efficiency Test Results: Synchronous Operation, V = 12V.
IN
Note: Non-synchronous operation not recommended for 12V operation, due to power loss in Schottky diode.
Copyright © 1999
Rev. 1.2 11/99
5
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