描述 Description

Qorvo's ACT6358 is a step-up DC/DC converter that is used to drive white LEDs with an externally programmable constant current. The device features integrated 40 V power MOSFETs that are capable of driving up to ten white LEDs in series, providing inherent current matching for uniform brightness. WLED brightness adjustment is easily achieved via a dual-function pin, which accepts either a PWM or an analog dimming control signal.
The product features a variety of protection circuits, including integrated over-voltage protection (OVP), programmable soft-start, cycle-by-cycle current limiting and thermal shutdown protection circuitry. The product has a 1 A current limit.
ACT6358 is available in a small 3mm x 3mm 8-pin TDFN33-8 package.

特性 Features

? High-efficiency DC/DC WLED bias supply
? Internal 40 V, 0.55 Ohm power MOSFET
? Up to 10 WLEDs per string
? Two peak current ACT6358: 1A
? Supports analog and PWM LED dimming
? Integrated over-voltage protection (OVP)
? Programmable soft-start function
? Thermal shutdown
? Cycle-by-cycle over-current protection

應用 Application

? TFT LCD Displays
? Smartphones
? Portable Media Players
? GPS / Personal Navigation Devices