PC8655 synchronous four-switch single inductor buck-boost LED dedicated controller, automatic frequency expansion, constant current and constant voltage output, supports PWM dimming

PC1621

PC8655 synchronous four-switch single inductor buck-boost LED dedicated controller, automatic frequency expansion, constant current and constant voltage output, supports PWM dimming [Copy link]

Features: PC8655 replaces TLD5190

AEC-Q100 qualified

Equipment ambient temperature:

-40°C≤TA≤125°C

Device junction temperature:

-40°C≤TJ≤150°C

Operating input voltage 4.5V to 55V, startup voltage down to 4.5V

High efficiency under various conditions, up to 96%

±3% LED current accuracy

High-side PMOS dimming FET gate driver

Switching frequency range is 200 kHz to 700 kHz with automatic spread spectrum function

Analog and PWM dimming (embedded or external)

LED and input current sensing with dedicated monitor output diagnostics and protection

Overload protection of external MOSFET

Output overvoltage, open load, short circuit GND protection

Input overvoltage and undervoltage protection

Overheat shutdown protection

Constant current and constant voltage regulation

Overview:

The switching frequency is adjustable or synchronizable from 200kHz to 700kHz. The device improves EMC performance through built-in functions

Spread spectrum switching frequency modulation forces continuous current regulation mode.

QFN7*7-48 7.00mm×7.00mm

The PC8655 is a synchronous four-switch single-inductor buck-boost constant current and constant voltage regulator controller capable of regulating the output voltage equal to, above, or below the input voltage. This architecture is ideal for driving applications that require high power efficiency and a minimum number of external components.

PC8655 supports analog and PWM dimming, with built-in PWM dimming. This adjustable soft-start function limits the current peak

and voltage overshoot at startup. The PC8655 integrates a high-side PMOS dimming MOSFET driver, ideal for applications requiring fast rising and falling edges for high contrast LED currents. It also provides a robust open load,

Short LED detection, OV/UV protection and thermal protection protection. It is suitable for automotive applications.

application

High-power LED lighting

Car headlights

Universal current/voltage regulator controller