AP8802HSP-13

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.AP8802HSP-13 Application Field and Working PrincipleOverview

The AP8802HSP-13 is a high Side Switched (HSS) LED driver, designed to drive and control light emitting diodes (LEDs) in applications such as automotive display lighting,and light indicator appliances. This device is capable of driving up to four LEDs in series, with the current, voltage, and power ranges adjustable. The AP8802HSP-13 offersdynamic dimming capability via pulse-width modulation and digital adjusting.

Features:

• Available in space-saving SOP-8 and SO-14 packages.
• All parameters adjustable from ground CML pins.
• Load–current range from 0.5 A to 4.5 A.
• Load–voltage range from 11 V to 24 V.
• Load-power range from 2.3 W to 59.2 W
• Coil-current range from 0.5 A to 5.0 A
• Programmable switching frequency from 500 kHz to 2 MHz
• Programmable PWM dimming ratio from 0 to 100%
• Digital programming circuitry

Working Principle of AP8802HSP-13

The AP8802HSP-13 is a single-ended high side switched LED driver that is capable of driving up to four LED strings in series. The LED driverconverts a low voltage, low current input signal into a high voltage, high current output signal to drive the LED loads. The device consists of a PWM controller, a power switch, a current sense amplifier, a voltage regulator, and a discharge/drive circuit. These components work together to deliver a regulated output voltage and current to the LED strings.The device can also dynamically control the LED brightness using pulse width modulation (PWM). The PWM signal can be generated using a microcontroller or other control circuitry. The output voltage and current are then adjusted accordingly. The device also has built-in thermal protection which will turn off the current to the LEDs if the temperature of the chip rises above a certain threshold.The AP8802HSP-13 also features safeguards such as over-voltage, over-current, and short-circuit protection. The device can also operate in either a linear or pulse width modulation (PWM) mode. In linear mode, the output voltage and current is controlled by an on-board voltage reference and current sense amplifier, respectively. In PWM mode, the output voltage and current are controlled by an external control signal.Conclusion

The AP8802HSP-13 is an easy-to-use LED driver capable of driving up to 4 LED strings in series. The device offers dynamic dimming capability, over-voltage, over-current and short-circuit protection, and can operate in both linear and PWM modes. The device is available in space-saving SOP-8 and SO-14 packages, making it ideal for a variety of applications including automotive display lighting and indicator appliances.

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