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PCA9633: 4-bit Fm+ I2C-bus LED driver

The PCA9633 is an I²C-bus controlled 4-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. A fifth 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 PCA9633 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 PCA9633 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. This feature is available for the 16-pin version only.

Software programmable LED Group and three Sub Call I²C addresses allow all or defined groups of PCA9633 devices to respond to a common I²C 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.

The PCA9633 is offered with 3 different I²C-bus address options: fixed I²C-bus address (8-pin version), 4 different I²C-bus addresses from 2 programmable address pins (10-pin version), and 126 different I²C-bus addresses from 7 programmable address pins (16-pin version). They are software identical except for the different number of address combinations.

The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9633 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.

PCA9633: Product Block Diagram

sot629-1_3d

Data Sheets (1)

Application Notes (3)

Users Guides (5)

Brochures (5)

Package Information (6)

Packing (6)

Supporting Information (5)

IBIS Model

• PCA9633 IBIS model (REV 1.1) ZIP PCA9633_1 9/2/2014

Ordering Information

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
PCA9633PW		SOT403-1	SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9633PW,118 (9352 814 16118)	9633	PCA9633PW		Always Pb-free	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9633PW,112 (9352 814 16112)	9633	PCA9633PW		Always Pb-free	0.0	2.0	5E8	1	1
PCA9633DP1		SOT505-1	Reflow_Soldering_Profile	Reel 13" Q1/T1	Active	PCA9633DP1,118 (9352 813 12118)	9633	PCA9633DP1		Always Pb-free	0.0	2.0	5E8	1	1
PCA9633D16		SOT109-1	SO-SOJ-REFLOW SO-SOJ-WAVE SO-SOJ-REFLOW SO-SOJ-WAVE	Reel 13" Q1/T1	Active	PCA9633D16,118 (9352 813 09118)	PCA9633	PCA9633D16		Always Pb-free	0.0	2.0	5E8	1	1
				Bulk Pack	Active	PCA9633D16,112 (9352 813 09112)	PCA9633	PCA9633D16		Always Pb-free	0.0	2.0	5E8	1	1
PCA9633DP2		SOT552-1	Reflow_Soldering_Profile SSOP-TSSOP-VSO-WAVE Reflow_Soldering_Profile SSOP-TSSOP-VSO-WAVE	Reel 13" Q1/T1	Active	PCA9633DP2,118 (9352 813 13118)	9633	PCA9633DP2		Always Pb-free	0.0	2.0	5E8	1	1
PCA9633TK		SOT908-1		Reel 13" Q1/T1	Active	PCA9633TK,118 (9352 816 18118)	9633	PCA9633TK		Always Pb-free	0.0	2.0	5E8	1	1
PCA9633BS		SOT629-1		Reel 13" Q1/T1	Active	PCA9633BS,118 (9352 813 08118)	9633	PCA9633BS		Always Pb-free	0.0	2.0	5E8	1	1