LT8471 Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT8471 Datasheet PDF : 34 Pages
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LT8471
Typical Performance Characteristics TA = 25°C, unless otherwise specified.
Primary Switch Current Limit
at 500kHz
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
0
20
40
60
80 100
DUTY CYCLE (%)
8471 G01
CH1, CH2 Switch VCESAT
0.6
0.5
0.4
0.3
0.2
0.1
0
0
0.5
1
1.5
2
2.5
SWITCH CURRENT (A)
8471 G02
Skyhook Switch VCESAT
0.5
0.4
0.3
0.2
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6
SWITCH CURRENT (A)
8471 G03
Switch Current Limit
at Minimum Duty Cycle
3.0
2.5
2.0
1.5
1.0
0.5
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
8471 G04
Skyhook Current Limit
vs Temperature
1.0
Feedback Voltages
805
–805
795
–795
0.8
+ FB
785
– FB
–785
0.5
775
–775
0.3
765
–765
0
–50 –30 –10 10 30 50 70 90 110 130 150
TEMPERATURE (°C)
8471 G05
755
–50 –25
–755
0 25 50 75 100 125 150
TEMPERATURE (°C)
8471 G06
Oscillator Frequency
1.2
1.0
RT = 84.5k
0.8
0.6
0.4
0.2
RT = 732k
0
–55 –35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
8471 G07
Switching Frequency
During Soft-Start
1.00
Internal UVLO for VIN1 and VIN2
2.5
2.4
0.75
VIN1
2.3
0.50
VIN2
2.2
0.25
2.1
0
2.0
–0.8
–0.4
0
0.4
0.8
–50 –30 –10 10 30 50 70 90 110 130 150
FB VOLTAGE (V)
8471 G08
TEMPERATURE (°C)
8471 G09
For more information www.linear.com/8471
8471fc
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