65-V, 4-A buck LED driver with inductive fast dimming

The TPS92205x family is a

2A / 4A non-synchronous Buck LED driver with 4.5V to 65V wide input range. By integrating the

low-side NMOS switch, the device is capable of driving LEDs as well as charging

batteries with high power density and high efficiency. The family also supports

common anode connection and single layer PCB design. The switching frequency is

configurable from 100kHz to 2.2MHz with optional spread spectrum feature for better

EMI performance.

The TPS92205x family supports four

dimming options, including analog, PWM, hybrid and flexible dimming. Each dimming

method can be configured through the PWM and ADIM input pins by means of simple high

and low signals. The family adopts an adaptive off-time current mode control along

with smart and accurate sampling to enable inductive fast dimming (IFD) and achieve

high dimming accuracy.

The TPS92205x family also provides

multiple systematic protections, including LED open and short, sense resistor open

and short, configurable thermal foldback and thermal shutdown. A Fault

output sends out acknowledge signals as soon as any fault condition is

detected.