pca9624 NXP Semiconductors, pca9624 Datasheet

pca9624

Manufacturer Part Number

pca9624

Description

8-bit Fm+ I2c-bus 100 Ma 40 V Led Driver

Manufacturer

NXP Semiconductors

Datasheet

1.PCA9624.pdf (34 pages)

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Download datasheet (187Kb)

1. General description

The PCA9624 is an I

dimming and blinking 100 mA Red/Green/Blue/Amber (RGBA) LEDs. Each LED output

has its own 8-bit resolution (256 steps) ﬁxed frequency individual PWM controller that

operates at 97 kHz with a duty cycle that is adjustable from 0 % to 99.6 % to allow the

LED to be set to a speciﬁc brightness value. An additional 8-bit resolution (256 steps)

group PWM controller has both a ﬁxed frequency of 190 Hz and an adjustable frequency

between 24 Hz to once every 10.73 seconds with a duty cycle that is adjustable from 0 %

to 99.6 % that is used to either dim or blink all LEDs with the same value.

Each LED output can be off, on (no PWM control), set at its individual PWM controller

value or at both individual and group PWM controller values. The PCA9624 operates with

a supply voltage range of 2.3 V to 5.5 V and the 100 mA open-drain outputs allow

voltages up to 40 V.

The PCA9624 is one of the ﬁrst LED controller devices in a new Fast-mode Plus (Fm+)

family. Fm+ devices offer higher frequency (up to 1 MHz) and more densely populated bus

operation (up to 4000 pF).

The active LOW Output Enable input pin (OE) blinks all the LED outputs and can be used

to externally PWM the outputs, which is useful when multiple devices need to be dimmed

or blinked together without using software control.

Software programmable LED Group and three Sub Call I

deﬁned groups of PCA9624 devices to respond to a common I

for example, all red LEDs to be turned on or off at the same time or marquee chasing

effect, thus minimizing I

126 devices on the same bus.

The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9624

through the I

their default state causing the outputs to be set HIGH (LED off). This allows an easy and

quick way to reconﬁgure all device registers to the same condition.

The PCA9624 and PCA9634 software is identical and if the PCA9624 on-chip 100 mA

NAND FETs do not provide enough current or voltage to drive the LEDs, then the

PCA9634 with larger current or higher voltage external drivers can be used.

PCA9624

8-bit Fm+ I

Rev. 01 — 3 June 2009

C-bus, identical to the Power-On Reset (POR) that initializes the registers to

C-bus 100 mA 40 V LED driver

C-bus controlled 8-bit LED driver optimized for voltage switch

C-bus commands. Seven hardware address pins allow up to

C-bus addresses allow all or

C-bus address, allowing

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