LM36010 Datasheet, PDF (25/37 Pages) Texas Instruments – Synchronous-Boost, Single-LED Flash Driver With 1.5-A High-Side Current Source

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LM36010
SNVSAN4A – APRIL 2017 – REVISED JULY 2017
8.2.3 Application Curves
T_A = 25°C, V_IN = 3.6 V, C_IN = 10 µF, C_OUT = 10 µF, L = 1 µH, V_LED = 3.4 V, Flash Time-out = 320 ms and Thermal Scale-Back
(TSB) disabled, unless otherwise noted.
100
95
90
85
80
75
70
65
60
55
50
0x00 0x0F 0x1F 0x2F 0x3F 0x4F 0x5F
Brightness Code (hex)
ƒ_SW = 2 MHz
I_CL = 2.8 A
85qC
25qC
-40qC
0x6F 0x7F
D028
Figure 38. LED Flash Efficiency vs Brightness Code
100
95
90
85
80
75
70
65
60
55
50
45
2.5
3
ƒ_SW = 2 MHz
3.5
4
4.5
V_IN (V)
I_CL = 2.8 A
Code 0x07
Code 0x0F
Code 0x17
Code 0x1F
Code 0x27
Code 0x2F
Code 0x37
Code 0x3F
5
5.5
D030
Figure 40. LED Flash Efficiency vs Input Voltage
100
95
90
85
80
75
70
65
60
55
50
45
2.5
85qC
25qC
-40qC
3
ƒ_SW = 2 MHz
I_CL = 1.9 A
3.5
4
4.5
5
5.5
V_IN (V)
D032
I_FLASH = 1.5 A
Flash Time-out < 120 ms at 85°C
Figure 42. LED Flash Efficiency vs Input Voltage
100
95
90
85
80
75
70
65
60
55
50
0x00 0x0F 0x1F 0x2F 0x3F 0x4F 0x5F
Brightness Code (hex)
ƒ_SW = 4 MHz
I_CL = 2.8 A
85qC
25qC
-40qC
0x6F 0x7F
D029
Figure 39. LED Flash Efficiency vs Brightness Code
100
95
90
85
80
75
70
65
60
55
50
45
2.5
3
ƒ_SW = 2 MHz
3.5
4
4.5
V_IN (V)
I_CL = 2.8 A
Code 0x47
Code 0x4F
Code 0x57
Code 0x5F
Code 0x67
Code 0x6F
Code 0x77
Code 0x7F
5
5.5
D031
Figure 41. LED Flash Efficiency vs Input Voltage
100
95
90
85
80
75
70
65
60
55
85qC
50
25qC
-40qC
45
2.5
3
3.5
ƒ_SW = 4 MHz
I_CL = 1.9 A
4
4.5
5
5.5
V_IN (V)
D033
I_FLASH = 1.5 A
Flash Time-out < 120 ms at 85°C
Figure 43. LED Flash Efficiency vs Input Voltage
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