Texas Instruments TPS92682EVM, User Manual, Page: 12 / 49

VLED1
VLED2+
I
LED
(A)
Efficie
ncy (%)
CC Boost Efficiency
0.1 0.2 0.3 0.4 0.5 0.6
86
87
88
89
90
91
92
93
94
95
CCBS
#LED = 8
#LED = 10
#LED = 12
I
LED
(A)
Efficie
ncy (%)
CC Boost-to-Battery Efficiency
0.1 0.2 0.3 0.4 0.5 0.6
55
60
65
70
75
80
85
90
95
CCBC
#LED = 1
#LED = 4
#LED = 7
Performance Data and Typical Characteristic Curves
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12 SLUUC13A – May 2019 – Revised August 2019
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TPS92682EVM Constant Current Two-channel Boost and Boost-to-Battery
Figure 2. CC Boost Efficiency for V
IN
= 12 V Figure 3. CC Buck-Boost Efficiency for V
IN
= 12 V
5.1 Startup Waveforms
Figure 4 and Figure 5 show the startup waveforms, I
LED
and Compensator voltage of the boost and boost-
to-battery channels. In this setup, a string of 12×LEDs are connected to the output of the boost and
6×LEDs to the output of the boost-to-battery channel.
Figure 4. Softstart waveforms for CHxSS3:0 = 7 Figure 5. Softstart waveforms for CHxSS3:0 = 31