TPS922055中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? 4.5-V to 65-V wide input range

? LED common anode connection

? Integrated 300-mΩ/150-mΩ MOSFET for 2-A/4-A

continuous output current

? Optional switching frequency: 100 kHz ~ 2.2 MHz

? Spread spectrum for TPS922053 and the

TPS922055

? Advanced dimming options:

– Analog dimming (256:1)

– Fast PWM dimming (200-ns pulse width)

– Hybrid and flexible dimming (2000:1 at 20-kHz

PWM, 10,000:1 at 4-kHz PWM, 1,000,000:1 at

120-Hz PWM)

? CV charging mode

? Full protection features:

– LED open and short protection

– Cycle-by-cycle current limit

– Thermal shutdown

– Switching FET failure protection

– External component failure protection

– Fault output (open drain)

? Configurable thermal foldback curve

? SON, SOT and SOP package options

2 Applications

? Constant illumination:

– Indoor, outdoor, stage lighting

– Surgical lighting

– Projector, laser TV, printer, IP camera

? Instant illumination:

– Machine vision

– Camera flash, fire alarm, strobe

– VR and AR wearable

? CV and CC source:

– Battery charger

– TEC controller

– LCD backlight

3 Description

The TPS92205x family is a 2-A/4-A non-synchronous

Buck LED driver with 4.5-V to 65-V 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 100 kHz to 2.2 MHz with optional

spread spectrum feature for better EMI performance.

The TPS92205x family supports four dimming

options, including analog dimming, PWM dimming,

hybrid dimming 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 ratio.

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.