TPS61169 Datasheet, PDF (15/24 Pages) Texas Instruments – High Current-Boost WLED Driver

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TPS61169
SNVSA40A – OCTOBER 2014 – REVISED MARCH 2016
Application Curves (continued)
Typical application condition is as in Figure 4, V_IN = 3.6 V, R_SET = 10.2 Ω, L = 4.7 µH, C_OUT = 1 µF, 10 LEDs in series (unless
otherwise specified).
PWM (2 V/DIV)
PWM (2 V/DIV)
IInductor
(300 mA/DIV)
VOUT (20 V/DIV)
IInductor (300 mA/DIV)
VOUT (20 V/DIV)
ILED (9 mA/DIV)
ILED (9 mA/DIV)
Time = 2 ms/DIV
Time = 2 ms/DIV
Figure 13. Start-Up Dimming Duty = 50%
PWM (2 V/DIV)
Figure 14. Shutdown Dimming Duty = 100%
PWM (2 V/DIV)
IInductor (300 mA/DIV)
VOUT (20 V/DIV)
ILED (9 mA/DIV)
Time = 2 ms/DIV
Duty = 50%
Figure 15. Shutdown Dimming
VFB (200 mV/DIV)
VOUT (5 V/DIV, AC coupled)
IInductor (300 mA/DIV)
ILED (9 mA/DIV)
Time = 5 ms/DIV
Duty = 1%-100%-1%
Figure 16. Dimming Transient-Dimming
VOUT (20 V/DIV)
IInductor (600 mA/DIV)
ILED (9 mA/DIV)
Time = 50 µs/DIV
Figure 17. Open LED Protection
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