STP16CP596MTR

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The STP16CP596MTR is an LED driver that belongs to the Power Management, Integrated Circuits (PMIC), LED Drivers product family manufactured by STMicroelectronics. This driver is an integrated 16-bit constant-current LED sink driver that can drive up to 8 LED strings located in a 7×7mm QFN package. It provides high accuracy LED current regulation, prescale control for analog dimming, switch control for USB digital dimming, and 8 PWM dimming levels.

The STP16CP596MTR is designed primarily for general lighting applications, such as LED TV backlight, monitor/notebook LCD, and industrial/architectural lighting. This device provides advanced features and functionalities such as diagnostic failure reporting, LED power-on and power-off current control, and LED open/short LED protection. With a wide operating voltage range of 6V to 24V, the STP16CP596MTR is ideal for a variety of different operating environments, such as automotive and industrial applications.

The control and power switching involved in the STP16CP596MTR’s operation relies on the device’s DC and gate drive structure. This structure enables the device to work both as a Buck or Buck-Boost converter, regulating the output current and monitoring the parameters of the LED circuits, while at the same time controlling the power switching of both the internal and external power supplies.

The device is composed of two separate power supplies, one setting the main supply voltage and the other supplying the gate drive. Both these supplies require a minimum voltage for operation. The main power supply is regulated by the built in digital control loop and the gate drive regulated with a high side switching MOSFET. The STP16CP596MTR contains all the necessary control logic and power input/output circuits to control the power switching and monitoring of the LEDs.

The STP16CP596MTR also integrates a charge-balance circuit. Essentially, this circuit uses a fraction of the output current to keep the internal MOSFET’s gate-source voltage at a low level. This helps protect the internal MOSFETs from overvoltage and also prevents it from entering a destructive shut-down state.

In order to control the LED strings, the STP16CP596MTR implements two dimming techniques. The analog dimming uses reverse currents applied through pins E1-E16. The current intensity is set with external resistors connected to an external voltage reference, and it is possible to program the current gain of each LED independently. The LED open/short LED protection limits the LED reverse current in the case of an open LED. Digital dimming is based on an I/o switch control from the micro-controller. The device can be operated as a Power-SAVE or power-ON switch, and the current intensity is programmable through the hardware interface.

The STP16CP596MTR is a very easy to use and reliable LED driver due to its wide range of features. It is ideal for a variety of applications, such as lighting, general lighting, automotive and industrial applications. With its wide voltage operating range, fast current programming and easy to use dimming techniques, the device offers unparalleled control and efficiency.

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