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PCA9530
Datasheet
General description
The PCA9530 is a 2-bit I2C 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 PCA9530 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 can not 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 setup 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 1.69 second. The open drain outputs directly drive the LEDs with maximum output sink current of 25 mA per bit and 50 mA per package.
To blink LEDs at periods greater than 1.69 second 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 PCF8574 or PCA9554. 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) initialize the registers to their default state causing the bits to be set HIGH (LED off).
One hardware address pin on the PCA9530 allows two devices to operate on the same bus.
Features
- 2 LED drivers (on, off, flashing at a programmable rate)
- 2 selectable, fully programmable blink rates (frequency and duty cycle) between 0.591 Hz and 152 Hz (1.69 seconds and 6.58 milliseconds)
- 256 brightness steps
- Input/output not used as LED drivers can be used as regular GPIOs
- Internal oscillator requires no external components
- I2C interface logic compatible with SMBus
- Internal power-on reset
- Noise filter on SCL/SDA inputs
- Active LOW reset input
- 2 open drain outputs directly drive LEDs to 25 mA
- Edge rate control on outputs
- 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 JESDEC Standard JESD78 which exceeds 100 mA
- Packages offered: SO8, TSSOP8 (MSOP8)
Products/packages
| Type number | North American Type number | Ordering code (12NC) | Product status | Package | Packing | Marking | Chemical content | Leadfree conversion date |
|---|---|---|---|---|---|---|---|---|
| PCA9530D | PCA9530D | 9352 762 96112 | Volume production | SOT96-1
(SO8) | Tube | Standard Marking | PCA9530D
| week 5, 2005 |
| PCA9530D | PCA9530D-T | 9352 762 96118 | Volume production | SOT96-1
(SO8) | Tape reel smd | Standard Marking | PCA9530D
| week 5, 2005 |
| PCA9530DP | PCA9530DP-T | 9352 762 97118 | Volume production | SOT505-1
(TSSOP8) | Reel Pack, SMD, 13" | Standard Marking | PCA9530DP
| week 12, 2005 |
Pricing/ordering/availability
| Type number | Ordering code(12NC) | Indicative price/unit($) | Region | Distributor | In stock | Order quantity | Inventory date | Buy online | Samples |
|---|---|---|---|---|---|---|---|---|---|
| PCA9530D | 9352 762 96112 | 0.8700 | NA | AVNET ELECTRONICS MARKETING | 390 | 1/7/2009 | Buy online | not available | |
| PCA9530D | 9352 762 96118 | 0.8700 | NA | DIGI-KEY CORPORATION | 2,500 | 1/6/2009 | Buy online | Order samples | |
| NA | DIGI-KEY CORPORATION | 4,974 | 1/6/2009 | Buy online | |||||
| PCA9530DP | 9352 762 97118 | 0.8700 | ASIA | SAC - Taiwan | yes | 2500 | 01/08/2009 | Buy online | Order samples |
| NA | DIGI-KEY CORPORATION | 5,000 | 1/6/2009 | Buy online | |||||
| NA | DIGI-KEY CORPORATION | 6,007 | 1/6/2009 | Buy online | |||||
| NA | FUTURE ELECTRONICS | 1,500 | 1/7/2009 | Buy online | |||||
| NA | MOUSER ELECTRONICS | 1,358 | 1/7/2009 | Buy online |
Applications
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Color mixing for RGBA LEDs
Design support
Application Notes
Support Documents
75016543;
An industry-leading portfolio of cost-effective, power-saving solutions for major home appliances (2008-06-01)75014636;
Getting more from distribution (2005-02-01)75013239;
I 2 C Logic Selection Guide (2005-01-12)75011212;
I2C 2002-1A Evaluation Board Kit (01-Mar-03)UM10204_3;
I2C-bus specification and user manual (26-Jun-07)75016189;
NXP I (2008-06-01)75016194;
NXP PCA9698 daughter card OM6281 (2008-05-01)75010198;
PCA9530/9533/9531/9532 LED Dimmers (25-Sep-02)75010654;
PCA9550/9551/9552 (01-Dec-01)75015353;
PCA9633 - Better control of RGBA LEDs (01-Feb-06)UM10317_1;
PCA9633 demonstration board OM6282 (15-Dec-08)UM10267_1;
PCA9698 demonstration board OM6281 (2008-09-26)Parametrics/similar products
| Type number | Package | Operating temp.(Cel) | PWMs | # of Bits | I²C-bus(kHz) | Operating voltage(VDC) | Max Sink Current per bit(mA) | # of Addresses | Max Sink Current per package(mA) | Reset input pin |
|---|---|---|---|---|---|---|---|---|---|---|
| PCA9530D | SOT96-1
(SO8) | -40~85 | 2 (160 Hz to 1.6 sec) | 2 | 400 | 2.3~5.5 | 25 | 2 | 50 | yes |
| PCA9530DP | SOT505-1
(TSSOP8) | -40~85 | 2 (160 Hz to 1.6 sec) | 2 | 400 | 2.3~5.5 | 25 | 2 | 50 | yes |
Similar products
PCA9530
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