TPS61199PWPR

TPS61199PWPR

Part Number: TPS61199PWPR

Manufacturer: Texas Instruments

Description: LED Lighting Drivers White LED Driver

Shipped from: Shenzhen/HK Warehouse

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TPS61199PWPR Description

The TPS61199 offers highly integrated solutions for the illumination of large-size LCDs. This piece of hardware incorporates a current-mode boost controller and eight current sinks, allowing it to power up to eight LED strings simultaneously. Each string contains numerous LEDs connected in series. Each string is equipped with its current regulator, and the current matching between the strings achieves an accuracy of 3% in regulation. The device will automatically adjust the output voltage of the boost converter to provide only the voltage required by the LED string with the largest forward voltage drop in addition to the minimum voltage required at the IFBx pin of that string. This will result in the driver’s efficiency being maximized.

The TPS61199 allows for external PWM signals to be used to lower the PWM brightness. The signal of the PWM can have a maximum frequency of up to 22 kilohertz at its highest possible setting. Using a PWM signal with a frequency of 200 hertz, it is possible to obtain dimming ratios of up to 5000:1. The TPS61199 incorporates overcurrent protection for the switch FET, as well as soft start-up, protection against LED shorts and open circuits, protection against overtemperature shutdown, and protection against LED open circuits. Both SO and HTSSOP packages with 20 pins are available for the TPS61199 device.

Features for the TPS61199

  • Integrated High-Power Boost Controller with an Input Voltage Range of 8 to 30 V
  • LED Voltages with Adaptive Boost Output
  • Drive as many as eight LED strings concurrently.
  • A maximum of 70 mA per LED string
  • 200 Hz PWM Dimming Ratio @ 5000:1 with 3% Current Matching Between Strings
  • MOSFET Overcurrent Defense
  • Protective LEDs that can be programmed
  • LED Open Protection that Can Be Adjusted
  • Protection Against Thermal Shutdown
  • PowerPADTM Compatible 20-Pin SO Package with TSSOP Package

Connector and Test Point Descriptions

● Input/Output Connections

In the following paragraphs, we’ll go over the many linkage points.

● J1 – VIN

The input power is connected to the positive terminal of this header. Shortening and twisting the input supply and GND leads to optimal efficiency.

● J2 – VIN/GND

This header is for connecting to the input power supply with a high current positive and return connector. Shorten and twist the power supply input cables.

● J3 – GND

Returning to the input power source, this header serves as the connector.

● J4 – 14-Pin Connector T

The TPS61199EVM-598 can be connected to the load through a 14-pin ribbon cable, which is made easier by this header. Users are responsible for generating the load with WLEDs or appropriately sized resistors.

● J5 – VOUT

The VOUT plane on the board is connected to this header.

● J8 and J9

These headers allow the user to monitor the voltage across each resistor and, as a result, the current flowing into each IFBx pin independently by replacing R13-R20 with a tiny resistor after changing it from 0 ohms to a resistor of a lower value. In addition, they make it simple for the user to connect to the IFBx pins even if a ribbon cable is not inserted into the J4 port.

● JP1 – LED ON

The user can remove the shunt on this jumper, and then J5 can be connected to the high side of the load. Through the installation of the shunt on this jumper, the output of the boost converter can be connected to J4. By removing the jumper, the load connected to J4 will be removed from the feedback path of the boost converter, which will trigger the overvoltage protection circuitry of the integrated circuit (IC). The user can measure the total output current (i.e., 8 times IFBx) by placing an ammeter across the jumper in place of the shunt.

● JP2 – EN

When the shunt on this jumper is installed to the ON position, the voltage at the ENABLE pin is set to VIN, and then it is scaled down using a resistor divider. This enables the boost converter on the integrated circuit. When you connect it to OFF, it pulls EN down to the ground, turning off the IC’s boost converter.

● JP3 – PWM

When the shunt for this jumper is connected to VDD, the current sinks receive 100% of the available current, which causes any associated LEDs to shine at their maximum capacity. To activate the contemporary sinks, the user must connect an external PWM signal or utilize JP3 to take PWM to a high logic (above 2 V but not higher than 20 V).

● JP4 – JP11

The user may use the shunt to link the IFBx pin to the JPx pin, and after that, they may connect either J8 or J9 to the low side of the external resistors or WLEDs. An additional option available to the user is to link J4 to the load. The user should use these jumpers to connect the relevant IFBx pin to GND for any strings that are not being used.

What is an LED driver?

LED drivers are electronic components that regulate and supply the electricity required to ‘drive’ individual runs of LED strip lights. They function analogous to conventional transformers in that they reduce the mains voltage value, which is 240 volts alternating current (usually 12 or 24v). However, LED drivers also convert the current supplied by the mains voltage, an alternating current, into the constant direct current (DC) that LEDs require to function correctly. LED drivers keep the voltage of the electricity provided to the lights continuously. They do this by altering their output in accordance with the electrical properties of the LED tape, which change as the tape warms up.

Conclusion

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