[Product] TPS92402MRRVR has SPI interface and adaptively configured 8-channel 2.5A LED driver

 The TPS92402MRRVR is an ‌ 8-channel 2.5A LED point controller ‌ launched by TI. It is packaged in VQFN and supports a wide input voltage range (4.5V to 65V), suitable for LED arrays with common anode or common cathode connections. The following are its core parameters:

Type: Linear

Topology: Constant current

Internal switch: None

Output number: 1

Voltage - Power supply (minimum) : 4.5V

Voltage - Power supply (maximum) : 65V

Voltage - Output: -

Current - Output/Channel: 2.5A

Frequency: 32MHz

Dimming: PWM

Application: General

Operating temperature: -55°C to 125°C

Installation type: Surface mount type

Package/Housing: 36-VQFN (5x6)

Overview of the Chip

The TPS92402MRRVR LED point controller device can provide pixel-level LED dimming control up to 2.5A within a wide input range of 4.5V to 65V, thus enabling an 8-channel independent lighting solution. The TPS92402MRRVR includes a series (8 in series) of integrated shunt FETs, each of which can provide PWM dimming for a single LED. With the help of a shunt FET string, this device can support a constant current regulator and is suitable for leds connected through a common anode or common cathode.

The TPS92402MRRVR features an internal oscillator capable of generating system clock signals, thereby supporting integrated PWM generators up to 16 bits and programmable PWM frequencies up to 60kHz. The Serial Peripheral Interface (SPI) enables high-speed data transmission and supports daisy-chain and star connections. SPI and the optimized pin arrangement support multiple devices to be connected together in a stacked configuration, thereby achieving a single-layer PCB.

The TPS92402MRRVR contains registers that can be used to program the PWM pulse width, slew rate, edge offset and open-circuit voltage of individual leds in a string of lights. It can also be used to report LED open circuits, LED short circuits, split FET open circuits and thermal warnings. The internal charge pump integrates spread spectrum function, which can enhance EMI performance. The TPS92402MRRVR also offers PWM dimming control for constant current regulators and can achieve multi-channel power-saving functions, thereby significantly enhancing dimming efficiency, especially under low-brightness conditions.

Main features

Wide input range: 4.5V to 65V

LED common anode or common cathode connection

Eight integrated PWM split FETs

Maximum continuous current of FET: 2.5A

An internal 32MHz oscillator for the PWM generator

Programmable 16-bit >20kHz PWM dimming

SPI interface and adaptive configuration

SPI clock up to 5MHz for data transmission

Star-shaped and Daisy chain connections

One device is used for 8 LED light strings or 2 4-LED light strings

Up to four devices can be stacked for 32 LED light strings

Enhanced EMI performance

Programmable PWM slew rate

Programmable PWM edge movement

Internal charge pump with spread spectrum

Comprehensive protection features

LED open-circuit detection and protection

LED short circuit detection

Open circuit detection of shunt FET

Programmable LED open-circuit voltage

Heat warning

Optional power-saving mode

Used to control the PWM output of the LED driver

Low-power standby mode

VQFN-36 package

Typical applications

The TPS92402MRRVR LED driver is widely used in the following fields:

• Stage and photography lighting

Surgical lighting

Machine vision and IP camera LED arrays

• Cold/warm WLED lighting

"3D printing"

Industrial transportation

Application diagram of TPS92402MRRVR

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