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NXP Semiconductors
PCA9626
24-bit Fm+ I 2 C-bus 100 mA 40 V LED driver
2. Features and benefits
? 24 LED drivers. Each output programmable at:
? Off
? On
? Programmable LED brightness
? Programmable group dimming/blinking mixed with individual LED brightness
? 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
? 256-step (8-bit) linear programmable brightness per LED output varying from fully off
(default) to maximum brightness using a 97 kHz PWM signal
? 256-step group brightness control allows general dimming (using a 190 Hz PWM
signal) from fully off to maximum brightness (default)
? 256-step group blinking with frequency programmable from 24 Hz to 10.73 s and
duty cycle from 0 % to 99.6 %
? 24 open-drain outputs can sink between 0 mA to 100 mA and are tolerant to a
maximum off state voltage of 40 V. No input function.
? 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’).
? Active LOW Output Enable (OE) input pin allows for hardware blinking and dimming of
the LEDs
? 7 hardware address pins allow 126 PCA9626 devices to be connected to the same
I 2 C-bus and to be individually programmed
? 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 PCA9626s
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.
? A Chase Byte allows execution of predefined ON/OFF pattern for the 24 LED outputs
? Software Reset feature (SWRST Call) allows the device to be reset through the
I 2 C-bus
? 25 MHz internal oscillator requires no external components
? Internal power-on reset
? Noise filter on SDA/SCL inputs
? No glitch on power-up
? Supports hot insertion
? Low standby current
? Operating power supply voltage (V DD ) range of 2.3 V to 5.5 V
? 5.5 V tolerant inputs on non-LED pins
? ? 40 ? C to +85 ? C operation
? ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per
JESD22-C101
? Latch-up testing is done to JEDEC Standard JESD78 which exceeds 100 mA
? Packages offered: LQFP48, HVQFN48
PCA9626
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 6 September 2012
? NXP B.V. 2012. All rights reserved.
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