STP16CPS05TTR

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The STP16CPS05TTR is a power management integrated circuit (PMIC) specifically designed for LED drivers. It is a high-performance, wide-input voltage range, high-current step-down switching regulator commonly used for driving high current LEDs. This device integrates a total of 16 channels in one package and provides a typical output current of 100mA per channel. The STP16CPS05TTR is designed for driving high current LEDs in an automobile, aircraft and general industrial applications.

The device operates with a wide input voltage range of 4.7V to 75V and requires only a minimum of external components. For each channel, the LED driver can deliver up to 100mA continuously, and up to 200mA peak current. The STP16CPS05TTR offers current regulation and thermal protection features to protect the LED in case of an over-current or over-temperature situation. The device supports a wide range of PWM dimming frequencies.

The STP16CPS05TTR employs a fixed-frequency step-down converter topology to regulate the LED current. It includes an internal oscillator and five external components (two resistors, one diode, one capacitor, a single NPN transistor) to create a stable LED current control loop. This circuit converts a high input voltage to a low output voltage in the presence of an external load. The device operates in a voltage mode control with a cycle-by-cycle current sense that provides excellent line and load regulation.

The general operating principle of the STP16CPS05TTR is relatively simple. When the output voltage drops below the reference voltage, the internal voltage amplifier turns ON the output switch and the transistor. This causes the current to increase, and in turn the voltage rises. The reference voltage is set using the two external resistors.

The voltage amplifier will continue to turn ON and OFF the output switch depending on the load current. Adjustments to the time the output switch is ON or OFF will affect the output current. The current sensing loop senses the output current of the STP16CPS05TTR and adjusts the ON time to maintain a steady current. The operating frequency of the device can be selected through external components.

In order to protect the STP16CPS05TTR device and the LED, the device features a host of safety mechanisms: under-voltage lockout, over-voltage protection, over-temperature protection and an over-current protection limit that limits the current that flows through the LED. All of these features can be disabled if desired.

Overall, the STP16CPS05TTR is an ideal device for driving high current LEDs in a wide range of applications. The device’s wide input voltage range, low standby current, fast transient response and easy-to-implement external components make it a convenient and cost-effective solution for LED lighting applications.

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