PCA9634D,118【PDF 2/38 页】IC LED DRIVER RGBA 20-SOIC

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NXP Semiconductors

PCA9634

8-bit Fm+ I 2 C-bus LED driver

2. Features

I 8 LED drivers. Each output programmable at:

N Off

N On

N Programmable LED brightness

N Programmable group dimming/blinking mixed with individual LED brightness

I 1 MHz Fast-mode Plus compatible I 2 C-bus interface with 30 mA high drive capability

on SDA output for driving high capacitive buses

I 256-step (8-bit) linear programmable brightness per LED output varying from fully off

(default) to maximum brightness using a 97 kHz PWM signal

I 256-step group brightness control allows general dimming (using a 190 Hz PWM

signal) from fully off to maximum brightness (default)

I 256-step group blinking with frequency programmable from 24 Hz to 10.73 s and duty

cycle from 0 % to 99.6 %

I Eight totem-pole outputs (sink 25 mA and source 10 mA at 5 V) with software

programmable open-drain LED outputs selection (default at totem-pole). No input

function.

I Output state change programmable on the Acknowledge or the STOP Command to

update outputs byte-by-byte or all at the same time (default to ‘Change on STOP’).

I Active LOW Output Enable (OE) input pin. LED outputs programmable to 1, 0 or

‘high-impedance’ (default at power-up) when OE is HIGH, thus allowing hardware

blinking and dimming of the LEDs.

I 7 hardware address pins allow 126 devices to be connected to the same I 2 C-bus

I 4 software programmable I 2 C-bus addresses (one LED Group Call address and three

LED Sub Call addresses) allow groups of devices to be addressed at the same time in

any combination (for example, one register used for ‘All Call’ so that all the PCA9634s

on the I 2 C-bus can be addressed at the same time and the second register used for

three different addresses so that 1 ? 3 of all devices on the bus can be addressed at the

same time in a group). Software enable and disable for I 2 C-bus address.

I Software Reset feature (SWRST Call) allows the device to be reset through the

I 2 C-bus

I 25 MHz internal oscillator requires no external components

I Internal power-on reset

I Noise ?lter on SDA/SCL inputs

I Edge rate control on outputs

I No glitch on power-up

I Supports hot insertion

I Low standby current

I Operating power supply voltage range of 2.3 V to 5.5 V

I 5.5 V tolerant inputs

I ? 40 ° C to +85 ° C operation

I ESD protection exceeds 2000 V HBM per JESD22-A114, 200 V MM per

JESD22-A115, and 1000 V CDM per JESD22-C101

I Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA

I Packages offered: SO20, TSSOP20, HVQFN20

PCA9634_6

Product data sheet

Rev. 06 — 12 September 2008

2 of 38

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