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LTC6992-3 Datasheet(PDF) 18 Page - Analog Devices

Part # LTC6992-3
Description  Voltage-Controlled Pulse Width Modulator (PWM)
PDF  34 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC6992-3 Datasheet(HTML) 18 Page - Analog Devices

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LTC6992-1/LTC6992-2/
LTC6992-3/LTC6992-4
18
Rev. D
For more information www.analog.com
POL = 1 forces a simple logic inversion, so it changes
the duty cycle range of the LTC6992-3 (making it 100%
to 5%) and LTC6992-4 (making it 95% to 0%). These
transfer functions are detailed in Figure 4.
Table 2. Duty Cycle Ranges
PART NUMBER
DUTY CYCLE RANGE vs VMOD = 0V → 1V
POL = 0
POL = 1
LTC6992-1
0% to 100%
100% to 0%
LTC6992-2
5% to 95%
95% to 5%
LTC6992-3
0% to 95%
100% to 5%
LTC6992-4
5% to 100%
95% to 0%
OPERATION
Figure 4. PWM Transfer Functions for All LTC6992 Family Parts
VMOD/VSET (V/V)
0
100
90
60
40
20
70
80
50
30
10
0
0.4
0.8 0.9
0.2
0.6
6992 F04a
VMOD/VSET = 0.9
VMOD/VSET = 0.1
1
0.3
0.7
0.1
0.5
POL = 1
POL = 0
VMOD/VSET (V/V)
0
100
90
60
40
20
70
80
50
30
10
0
0.4
0.8 0.9
0.2
0.6
6992 F04b
1
0.3
0.7
0.1
0.5
POL = 1
POL = 0
VMOD/VSET = 0.86
VMOD/VSET = 0.14
VMOD/VSET (V/V)
0
100
90
60
40
20
70
80
50
30
10
0
0.4
0.8 0.9
0.2
0.6
6992 F02c
1
0.3
0.7
0.1
0.5
POL = 1
POL = 0
VMOD/VSET = 0.1
VMOD/VSET = 0.86
VMOD/VSET (V/V)
0
100
90
60
40
20
70
80
50
30
10
0
0.4
0.8 0.9
0.2
0.6
6992 F02d
1
0.3
0.7
0.1
0.5
POL = 1
POL = 0
VMOD/VSET = 0.9
VMOD/VSET = 0.14
LTC6992-1
LTC6992-2
LTC6992-3
LTC6992-4



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