Texas Instruments TPS60230EVM-047 manual Setup, LED Current

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Input/Output Connector Descriptions

2.2Setup

Connect an input supply or battery between J1 and J2. The voltage range on this supply should stay between 2.7V and 6.0V. Set the appropriate brightness by configuring JP1 and JP2.

2.3Operation

The EVM has been optimized to operate from a single-cell Li-Ion battery with an input voltage range of 2.7V to 6.0V. The value for R1 programs the maxi- mum LED current. For this EVM, the maximum current is set to 20mA. Howev- er, by changing the value of R1, LED currents up to 25mA can be achieved. Currents less than 20mA can be achieved by appropriately configuring JP1 and JP2, as shown in Table 1.

Table 1. Relative LED Current Levels

JP1 (EN2)

JP2 (EN1)

LED CURRENT

 

 

 

0

0

0

 

 

 

0

1

1/3 full

 

 

 

1

0

2/3 full

 

 

 

1

1

Full (20mA for R1 = 7.87kΩ)

 

 

 

EN1 and EN2 can also be used for pulse width modulator (PWM) dimming. The PWM signal can be applied to EN1, EN2, or both. In this case, the LED current is proportional to duty factor and can have a maximum current dictated by how EN1 and EN2 are configured. The maximum recommended PWM fre- quency is 50kHz, and the minimum recommended ON time is 2.5us. Refer to the datasheet (SLVS516) for more information in regards to PWM dimming.

2.4Test Results

The efficiency curve in Figure 1 reflects the power delivered to the LED. The output power used for the efficiency calculation is the sum of all the LED cur- rents multiplied by the LED forward voltage.

Figure 1. Efficiency vs VIN

Efficiency (%)

90

80

70

60

50

40

30

20

10

0

EN2 and EN1 = On

ILED = 20mA

2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 5.9 6.3 6.5

Input Voltage (V)

TPS60230EVM-0473

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Contents User’s Guide Products Applications Important NoticeEVM Important Notice EVM Warnings and Restrictions Read This First Trademarks TPS60230EVM047 Introduction Initial ConfigurationLED Current SetupPrinted Circuit Board PCB Layout Assembly LayerBill of Materials Schematic

TPS60230EVM-047 specifications

The Texas Instruments TPS60230EVM-047 Evaluation Module is a versatile platform designed to facilitate the evaluation and application of the TPS60230 high-efficiency boost converter. Targeted for applications demanding reliable power solutions, the TPS60230EVM-047 is ideal for LED drivers, portable devices, and battery-operated systems where efficiency is paramount.

One of the standout features of the TPS60230 is its ability to deliver a maximum output current of 1A while operating from a wide input voltage range of 1.8V to 5.5V. This flexibility allows the device to be powered by various types of battery sources, making it suitable for a wide range of applications. Its ability to provide a regulated and stable output voltage makes it an excellent choice for situations where consistent performance is crucial.

The module utilizes an innovative control scheme, which contributes to its high efficiency, often exceeding 90%. This makes the TPS60230 particularly advantageous in applications where battery life is critical. The device employs a boost topology, enabling it to step up lower voltages to higher output levels, thereby maximizing the usability of available power sources.

In terms of design, the TPS60230EVM-047 features a compact layout that allows for easy integration into existing systems. The evaluation module includes all necessary components for testing and evaluation, including the TPS60230 IC, inductor, capacitors, and feedback resistors. This comprehensive design aids engineers in quickly prototyping and validating their power solutions.

Another notable characteristic of the TPS60230 is its built-in thermal protection and over-current protection features, which enhance reliability and safeguard against overheating and excessive current conditions. Additionally, the device supports adjustable output voltage settings via external resistors, allowing users to customize their output per specific application requirements.

Furthermore, the device operates at a frequency of up to 1.2MHz, which not only supports smaller passive components but also minimizes PCB space requirements. This compact footprint is essential for modern electronic designs where space conservation is a priority.

To sum up, the Texas Instruments TPS60230EVM-047 Evaluation Module provides a comprehensive solution for evaluating a high-performance boost converter. Its blend of efficiency, versatility, and user-friendly design makes it an excellent choice for engineers aiming to develop efficient power solutions. With its robust feature set and advanced characteristics, the TPS60230EVM-047 stands out as a key component in the realm of power management.