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LM51551DSST Datasheet(PDF) 8 Page - Texas Instruments

Part # LM51551DSST
Description  LM5155x 2.2-MHz Wide Input Nonsynchronous Boost, SEPIC, Flyback Controller
PDF  48 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LM51551DSST Datasheet(HTML) 8 Page - Texas Instruments

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8.6 Typical Characteristics
RT Resistor (k:)
910
20
30
40 50 60 70
100
200 250
0
200
400
600
800
1000
1200
1400
1600
1800
2000
2200
2400
D001
D001
Figure 8-1. Frequency vs RT Resistance
Temperature (qC)
-40
-20
0
20
40
60
80
100
120
140
160
90
2000
92
2040
94
2080
96
2120
98
2160
100
2200
102
2240
104
2280
106
2320
108
2360
110
2400
RT=9.09kOhm
RT=220kOhm
D002
RT=220k:
RT=9.09k:
Figure 8-2. Frequency vs Temperature
IVCC (mA)
0
20
40
60
80
100
120
0
1
2
3
4
5
6
7
D003
Figure 8-3. VVCC vs IVCC
VBIAS (V)
0
2
4
6
8
10
12
0
2
4
6
8
10
12
D004
BIAS
VCC
Figure 8-4. VVCC vs VBIAS (No Load)
Duty Cycle (%)
0
10
20
30
40
50
60
70
80
90
100
10
11
12
13
14
15
16
17
18
19
20
FSW=440kHz, RS=6m:, LM=1.2PH, VLOAD=10V
D005
RSL=0:
RSL=1k:
Figure 8-5. Peak Current Limit vs Duty Cycle
Temperature (qC)
-40
-20
0
20
40
60
80
100
120
140
160
95
96
97
98
99
100
101
102
103
104
105
D006
Figure 8-6. Current Limit Threshold vs
Temperature
LM5155, LM51551
SNVSB75E – DECEMBER 2018 – REVISED AUGUST 2023
www.ti.com
8
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Copyright © 2023 Texas Instruments Incorporated
Product Folder Links: LM5155 LM51551



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