ZHCSBB4B July 2013 – June 2017 TPS61197
PRODUCTION DATA.
The TPS61197 also supports the PWM dimming by turning on and off the boost converter to save cost of the dimming MOSFET. Figure 21 is the application circuit. This application requires small output capacitance so as to discharge the output voltage fast during dimming off period. The minimum dimming on time must be longer than 200 µs to ramp up the output voltage to achieve the setting LED current during dimming on period.