LM3556_15 Datasheet, PDF (8/39 Pages) Texas Instruments – Synchronous Boost LED Flash Driver With High-Side Current Source

LM3556
SNVS796D – AUGUST 2011 – REVISED OCTOBER 2015
Typical Characteristics (continued)
1.000
85°C
0.1
0.01
25°C
-40°C
0.001
2.7 3.1 3.5 3.9 4.3 4.7 5.1
EN = 0 V
VIN (V)
Figure 8. I_Q Shutdown vs V_IN
4.150
4.133
4.116
4.099
4.082
4.066
4.048
4.031
4.015
3.997
25°C
85°C
- 40°C
3.980
2.7 3.0 3.3 3.6 3.9 4.2 4.5
VIN (V)
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5.24
5.22
5.20
5.18
5.16
5.14
5.12
25°C
85°C
- 40°C
5.10
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
VIN (V)
Figure 9. Variation of OVP With V_IN
1.92
1.88
25°C
- 40°C
85°C
1.84
1.80
1.76
1.72
1.68
1.64
2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
Current Limit = 1.7 A
Figure 10. Frequency With V_IN and Over Temperature
2.30
2.25
25°C
- 40°C
85°C
2.20
2.15
2.10
2.05
2.00
1.95
2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2
VIN (V)
Current Limit = 1.9 A
Figure 11. Input Current Limit Over Temperature and V_IN
3.1
3.0
2.9
25°C
2.8
- 40°C
85°C
2.7
2.6
2.5
2.4
2.6 2.8 3.0 3.2 3.4 3.6 3.8 4.0 4.2 4.4
VIN (V)
Current Limit = 2.5 A
Figure 12. Input Current Limit Over Temperature and V_IN
Figure 13. Input Current Limit Over Temperature and V_IN
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