LM36010 Datasheet, PDF (27/37 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
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
100
95
85qC
25qC
95
85qC
25qC
90
-40qC
90
-40qC
85
85
80
80
75
75
70
70
65
65
60
60
55
55
50
50
45
2.5
3
3.5
ƒ_SW = 2 MHz
4
4.5
V_IN (V)
I_FLASH = 0.75 A
5
5.5
D040
I_CL = 1.9 A
45
2.5
3
3.5
ƒ_SW = 4 MHz
4
4.5
V_IN (V)
I_FLASH = 0.75 A
5
5.5
D041
I_CL = 1.9 A
Figure 50. LED Flash Efficiency vs Input Voltage
Figure 51. LED Flash Efficiency vs Input Voltage
100
95
90
85
80
75
70
65
60
55
50
45
2.5
3
3.5
ƒ_SW = 2 MHz
85qC
25qC
-40qC
4
4.5
V_IN (V)
I_FLASH = 0.75 A
5
5.5
D042
I_CL = 2.8 A
100
95
90
85
80
75
70
65
60
55
50
45
2.5
3
3.5
ƒ_SW = 4 MHz
85qC
25qC
-40qC
4
4.5
5
5.5
V_IN (V)
D043
I_FLASH = 0.75 A I_CL = 2.8 A
Figure 52. LED Flash Efficiency vs Input Voltage
Figure 53. 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 = 2 MHz
85qC
25qC
-40qC
0x6F 0x7F
D044
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
85qC
25qC
-40qC
0x6F 0x7F
D045
Figure 54. LED Torch Efficiency vs Brightness Code
Figure 55. LED Torch Efficiency vs Brightness Code
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