TPS92402MRRVR中文资料德州仪器数据手册PDF规格书

1 Features

• 4.5V to 65V wide input range

• LED common anode or cathode connection

• 8 integrated PWM shunt FETs

– 2.5A FET max continuous current

– Internal 32MHz oscillator for PWM generator

– Programmable 16-bit, >20kHz PWM dimming

• SPI interface and adaptive configuration

– Up to 5MHz SPI clock for data transfer

– Star and daisy chain connection

– One device for 8-LED or 2x 4-LED strings

– Stacking up to 4 devices for 32-LED string

• Enhanced EMI performance

– Programmable PWM slew rate

– Programmable PWM edge shift

– Internal charge pump with spread spectrum

• Full protection features

– LED open detection and protection

– LED short detection

– Shunt FET open detection

– Programmable LED open voltage

– Thermal warning

• Optional power save mode

– PWM output to control LED drivers

– Low power standby mode

• Package: VQFN-36

2 Applications

• Stage and photography lighting

• Surgical lighting

• Machine vision and IP camera LED array

• Cold/warm WLED lighting

• 3D printing

• Industrial transportation

3 Description

The TPS92402 LED dot-controller device enables 8-

channel individual lighting solutions by providing up

to 2.5A pixel-level LED dimming control with 4.5V to

65V wide input range. The device includes a string

of 8 series-connected integrated shunt FETs, each of

which providing PWM dimming for an individual LED.

The shunt FET string allows the device to support

constant current regulators with either commmonanode

or common-cathode LEDs.

The TPS92402 has an internal oscillator for a system

clock to enable integrated PWM generator up to 16-bit

with programmable PWM frequency up to 60kHz. The

serial peripheral interface (SPI) enables high speed

data transmission and supports both daisy chain and

star connections. The SPI and optimized pinout allow

multiple devices connected in stacking configuration

for single-layer PCBs.

The TPS92402 incorporates registers for

programming PWM pulse width, slew rate, edge

shift and open voltage of each individual LED in

the string and for reporting LED open, LED short,

shunt FET open and thermal warning. The internal

charge pump incorporates spread spectrum feature

to enhance EMI performance. The TPS92402 also

provides PWM dimming control of constant current

regulators and enables multi-channel power save to

significantly increase dimming efficiency especially in

low brightness condition.