With a 40-V rated integrated switch FET, the TPS61161-Q1 is a boost converter that drives
up to 10 LEDs in series. The boost converter runs at 600-kHz fixed switching frequency to reduce
output ripple, improve conversion efficiency, and allow for the use of small external
components.
The default white LED current is set with the external sensor
resistor Rset, and the
feedback voltage is regulated to 200 mV, as shown in the typical
application. During the operation,
the LED current can be controlled using the 1-wire digital interface
(EasyScale protocol) through the CTRL pin. Alternatively, a pulse width
modulation (PWM) signal can be applied to the CTRL pin through which
the duty cycle determines the
feedback reference voltage. In either digital or PWM mode, the
TPS61161-Q1 does not burst the LED
current; therefore, it does not generate audible noises on the output
capacitor. For maximum
protection, the device features integrated open LED protection that
disables the TPS61161-Q1 to
prevent the output from exceeding the absolute maximum ratings during
open LED conditions.
The TPS61161 is available in a space-saving, 2-mm × 2-mm QFN (DRV) package with thermal
pad.
With a 40-V rated integrated switch FET, the TPS61161-Q1 is a boost converter that drives
up to 10 LEDs in series. The boost converter runs at 600-kHz fixed switching frequency to reduce
output ripple, improve conversion efficiency, and allow for the use of small external
components.
The default white LED current is set with the external sensor
resistor Rset, and the
feedback voltage is regulated to 200 mV, as shown in the typical
application. During the operation,
the LED current can be controlled using the 1-wire digital interface
(EasyScale protocol) through the CTRL pin. Alternatively, a pulse width
modulation (PWM) signal can be applied to the CTRL pin through which
the duty cycle determines the
feedback reference voltage. In either digital or PWM mode, the
TPS61161-Q1 does not burst the LED
current; therefore, it does not generate audible noises on the output
capacitor. For maximum
protection, the device features integrated open LED protection that
disables the TPS61161-Q1 to
prevent the output from exceeding the absolute maximum ratings during
open LED conditions.
The TPS61161 is available in a space-saving, 2-mm × 2-mm QFN (DRV) package with thermal
pad.