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Part: PCA9532BS
Category:
Interface and Interconnect
-> I2C
Description: PCA9532; 16-bit I2C Led Dimmer;; Package: SOT616-1 (HVQFN24)
Company: Philips Semiconductors
Datasheet: Download PCA9532BS datasheet File size : 110 kB
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Datasheet text preview:
INTEGRATED CIRCUITS
PCA9532 16-bit I2C LED dimmer
Product data Supersedes data of 2003 Feb 26 2003 May 02
Philips Semiconductors
Philips Semiconductors
Product data
16-bit I2C LED dimmer
PCA9532
DESCRIPTION
The PCA9532 is a 16-bit I2C-bus and SMBus I/O expander optimized for dimming LEDs in 256 discrete steps for Red/Green/Blue (RGB) color mixing and back light applications. The PCA9532 contains an internal oscillator with two user programmable blink rates and duty cycles coupled to the output PWM. The LED brightness is controlled by setting the blink rate high enough (> 100 Hz) that the blinking cannot be seen and then using the duty cycle to vary the amount of time the LED is on and thus the average current through the LED. The initial set-up sequence programs the two blink rates/duty cycles for each individual PWM. From then on, only one command from the bus master is required to turn individual LEDs ON, OFF, BLINK RATE 1 or BLINK RATE 2. Based on the programmed frequency and duty cycle, BLINK RATE 1 and BLINK RATE 2 will cause the LEDs to appear at a different brightness or blink at periods up to 1.6 seconds. The open drain outputs directly drive the LEDs with maximum output sink current of 25 mA per bit and 200 mA per package (100 mA per octal). To blink LEDs at periods greater than 1.6 seconds the bus master (MCU, MPU, DSP, chipset, etc.) must send repeated commands to turn the LED on and off as is currently done when using normal I/O Expanders like the Philips PCF8575 or PCA9555. Any bits not used for controlling the LEDs can be used for General Purpose Parallel Input/Output (GPIO) expansion which provides a simple solution when additional I/O is needed for ACPI power switches, sensors, pushbuttons, alarm monitoring, fans, etc. The active-LOW hardware reset pin (RESET) and Power-On Reset (POR) initializes the registers to their default state, all zeroes, causing the bits to be set HIGH (LED off). Three hardware address pins on the PCA9532 allow eight devices to operate on the same bus.
FEATURES
· 16 LED drivers (on, off, flashing at a programmable rate) · 2 selectable, fully programmable blink rates (frequency and duty
cycle) between 0.625 and 160 Hz (6.4 seconds and 6.25 milliseconds)
· 256 brightness steps · Input/outputs not used as LED drivers can be used as regular
GPIOs
· Internal oscillator requires no external components · I2C-bus interface logic compatible with SMBus · Internal power-on reset · Noise filter on SCL/SDA inputs · Active-LOW reset input · 16 open drain outputs directly drive LEDs to 25 mA · Controlled edge rates to minimize ground bounce · No glitch on power-up · Supports hot insertion · Low stand-by current · Operating power supply voltage range of 2.3 V to 5.5 V · 0 to 400 kHz clock frequency · ESD protection exceeds 2000 V HBM per JESD22-A114,
150 V MM per JESD22-A115 and 1000 V CDM per JESD22-C101
· Latch-up testing is done to JEDEC Standard JESD78 which
exceeds 100 mA
· Packages offered: SO24, TSSOP24, HVQFN24
ORDERING INFORMATION
PACKAGES 24-pin plastic SO 24-pin plastic TSSOP TEMPERATURE RANGE -40 to +85 °C -40 to +85 °C ORDER CODE PCA9532D PCA9532PW TOPSIDE MARK PCA9532D PCA9532 DRAWING NUMBER SOT137-1 SOT355-1 SOT616-1
24-pin plastic HVQFN -40 to +85 °C PCA9532BS 9532 Standard packing quantities and other packaging data is available at www.philipslogic.com/packaging. I2C is a trademark of Philips Semiconductors Corporation.
2003 May 02
2
Philips Semiconductors
Product data
16-bit I2C LED dimmer
PCA9532
PIN CONFIGURATION -- SO, TSSOP
A0 1 A1 A2 LED0 LED1 LED2 LED3 LED4 LED5 2 3 4 5 6 7 8 9 24 VDD 23 SDA 22 SCL 21 RESET 20 LED15 19 LED14 18 LED13 17 LED12 16 LED11 15 LED10 14 LED9 13 LED8 SW00931
PIN CONFIGURATION -- HVQFN
21 VDD 20 SDA 19 SCL 18 RESET 17 LED15 16 LED14 15 LED13 14 LED12 13 LED11 LED10 12 LED8 10 LED9 11 7 8 LED7 9 VSS 24 A2 23 A1 22 A0
LED0 1 LED1 2 LED2 3 LED3 4 LED4 5 LED5 6
LED7 11 VSS 12
LED6
LED6 10
TOP VIEW
su01668
Figure 1. Pin configuration -- SO, TSSOP
Figure 2. Pin configuration -- HVQFN
PIN DESCRIPTION
SO, TSSOP PIN NUMBER 1 2 3 4, 5, 6, 7, 8, 9, 10, 11 12 13, 14, 15, 16, 17, 18, 19, 20 21 22 23 24 HVQFN PIN NUMBER 22 23 24 1, 2, 3, 4, 5, 6, 7, 8 9 10, 11, 12, 13, 14, 15, 16, 17 18 19 20 21 SYMBOL A0 A1 A2 LED0-7 VSS LED8-15 RESET SCL SDA VDD FUNCTION Address input 0 Address input 1 Address input 2 LED driver 0-7 Supply ground LED driver 8-15 Active-LOW reset input Serial clock line Serial data line Supply voltage
2003 May 02
3
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