PCA9635PW: 16-bit Fm+ I2C-bus LED driver
The PCA9635 is an I²C-bus controlled 16-bit LED driver optimized for Red/Green/Blue/Amber (RGBA) color mixing applications. 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 pct to 99.6 pct 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 pct to 99.6 pct 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 LED output driver is programmed to be either open-drain with a 25 mA current sink capability at 5 V or totem-pole with a 25 mA sink, 10 mA source capability at 5 V. The PCA9635 operates with a supply voltage range of 2.3 V to 5.5 V and the outputs are 5.5 V tolerant. LEDs can be directly connected to the LED output (up to 25 mA, 5.5 V) or controlled with external drivers and a minimum amount of discrete components for larger current or higher voltage LEDs.
The PCA9635 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) allows asynchronous control of the LED outputs and can be used to set all the outputs to a defined I²C-bus programmable logic state. The OE can also be used to externally PWM the outputs, which is useful when multiple devices need to be dimmed or blinked together using software control.
Software programmable LED Group and three Sub Call I²C-bus addresses allow all or defined groups of PCA9635 devices to respond to a common I²C-bus address, allowing for example, all red LEDs to be turned on or off at the same time or marquee chasing effect, thus minimizing I²C-bus commands. Seven hardware address pins allow up to 126 devices on the same bus.
The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9635 through the I²C-bus, identical to the Power-On Reset (POR) that initializes the registers to 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.
PCA9635PW: Product Block Diagram
Outline 3d SOT361-1
Data Sheets (1)
Application Notes (1)
Users Guides (4)
Brochures (3)
Selector Guides (1)
Package Information (1)
Packing (1)
Supporting Information (1)
IBIS Model
Ordering Information
| Product | Status | Package version | Enable | Application | Operating Temperature (Cel) | PWMs | I2C-bus interface | Max Sink Current, per package (mA) | Reset input pin | I2C-bus (kHz) | Operating voltage (VDC) | Max Sink Current per bit (mA) | No of Addresses | Number of bits |
|---|
| PCA9635PW/Q900 | Active | SOT361-1 | TSSOP28 | | -40~85 | 17 (16 x 97 kHz dim and 1 x 97 kHz dim or 24 Hz to 10.73 sec blink) | Fast Mode Plus 30 mA SDA outputs for 4000 pF bus | 400 | | 1000 | 2.3~5.5 | 25 | 126 | 16 |
| PCA9635PW | Active | SOT361-1 | TSSOP28 | | -40~85 | 17 (16 x 97 kHz dim and 1 x 97 kHz dim or 24 Hz to 10.73 sec blink) | Fast Mode Plus 30 mA SDA outputs for 4000 pF bus | 400 | | 1000 | 2.3~5.5 | 25 | 126 | 16 |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | EFR | IFR(FIT) | MTBF(hour) | MSL | MSL LF |
|---|
| PCA9635PW | | SOT361-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9635PW,118
(9352 822 25118) | PCA9635PW | PCA9635PW |    | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| Bulk Pack | Active | PCA9635PW,112
(9352 822 25112) | PCA9635PW | PCA9635PW | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
| PCA9635PW/Q900 | | SOT361-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | PCA9635PW/Q900,118
(9352 898 01118) | PCA9635PW | PCA9635PW/Q900 | | Always Pb-free | 0.0 | 2.0 | 5E8 | 1 | 1 |
