TPS922050中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? 4.5V to 65V wide input range

? LED common anode connection

? Integrated 300mΩ MOSFET:

– Typical current limit (1.6A / 3.2A)

– Switching frequency (400kHz / 1MHz)

? Advanced dimming options:

– Analog dimming (200:1)

– Fast PWM dimming (50ns pulse width)

? Full protection features:

– LED open and short protection

– Switching FET open and short protection

– External component failure protection

– Cycle-by-cycle current limit

– Thermal shutdown

? Package: WSON-8, HVSSOP-8, SOT583

2 Applications

? Constant illumination:

– Indoor and outdoor lighting

– Appliance lighting

– Cold/warm WLED lighting

– Emergency and signage lighting

– Security floodlight

– LED bulb and lamp

– LCD backlight

? Instant illumination:

– Machine vision and camera flash

– Fire alarm and strobe

3 Description

The TPS92205x family is a 1A / 2A non-synchronous

Boost / Buck-Boost LED driver with 4.5V to 65V wide

input range. By integrating the low-side NMOS, the

device is capable of driving LEDs with high power

density and high efficiency. The device also supports

common anode anodeconnection and single layer

PCB. The switching frequency is set at 400kHz or

1MHz.

The TPS92205x family support PWM dimming by

configuring through the DIM input pins by means of

simple high and low signals. The TPS92205x family

support analog dimming by configuring through the

DIM input pins by means of analog voltage signals.

The device adopts an adaptive off-time current mode

control along with smart and accurate sampling to

enable fast PWM dimming and achieve high dimming

ratio.

The TPS92205x family also provides multiple

systematic protections, including LED open and short,

switching FET open and short, sense resistor open

and short, and thermal shutdown.