TPS92661QPHPRQ1

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The TPS92661QPHPRQ1 is a high-efficiency, high-efficiency constant current boost driver designed specifically as an LED luminance regulator. Its small size and flexible external interface make it ideal for cost-sensitive applications. It is classified as PMIC-LED Driver, because it can drive LEDs, typically with better performance than is possible with discrete components.

The TPS92661QPHPRQ1 is designed to meet the following specifications:

1. Input voltage range: 2.5V to 6.0V;
2. Output voltage range: 8V to 16V;
3. Output current: up to 20mA;
4. Operating temperature: -20°C to +70°C;
5. Operating frequency: 65kHz to 250kHz;
6. Dimming options: EXIT, 4B, 6B.

The TPS92661QPHPRQ1 has a wide range of application fields which includes automotive interior lighting, indicator lighting, displays and other light emitting devices.

The working principle of TPS92661QPHPRQ1 is as follows. First, the driver uses an external MOSFET to regulate the current, and the MOSFET operates in an active region. The input voltage is connected to the express switch and the current is adjusted by varying the voltage across this switch. This voltage is converted to a constant current and the current level is controlled by an external resistor connected to the sense node. The output current is adjusted in accordance with the input voltage and set by the external resistor at the sense node.

When the input voltage is increased, the output current is also increased. A reference voltage is used to maintain a stable output current when the input voltage decreases. The output current always remains constant, even as the input voltage varies from 6V to 2.5V. The output current ripple is also minimized due to the current feedback loop.

The TPS92661QPHPRQ1 LED driver also includes several features to control LED brightness, such as adjustable LED dimming, EXIT and 6B dimming. The EXIT dimming feature sets the operating frequency based on the voltage at the express switch, allowing the current to be adjusted at lower frequencies to improve dimming performance. The 6B dimming feature sets the operating frequency at a fixed frequency and the brightness is adjusted by varying the duty cycle, again improving dimming accuracy.

In conclusion, the TPS92661QPHPRQ1 is an efficient, cost effective PMIC-LED driver that is well-suited for use in a variety of automotive, indicator and display lighting applications. It offers a wide operating voltage range, adjustable current level, adjustable operating frequency and various dimming options, all in a very small package. As such, it is an ideal choice for cost-sensitive applications.

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