pca9635 NXP Semiconductors, pca9635 Datasheet

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pca9635

Manufacturer Part Number
pca9635
Description
Pca9635 16-bit Fm I2c-bus Led Driver
Manufacturer
NXP Semiconductors
Datasheet

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1. General description
The PCA9635 is an I
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 % to 99.6 % 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 % to 99.6 %
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 I
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 I
defined groups of PCA9635 devices to respond to a common I
for example, all red LEDs to be turned on or off at the same time or marquee chasing
effect, thus minimizing I
devices on the same bus.
The Software Reset (SWRST) Call allows the master to perform a reset of the PCA9635
through the I
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.
PCA9635
16-bit Fm+ I
Rev. 05 — 22 March 2007
2
C-bus, identical to the Power-On Reset (POR) that initializes the registers to
2
C-bus LED driver
2
C-bus controlled 16-bit LED driver optimized for
2
C-bus commands. Seven hardware address pins allow up to 126
2
C-bus addresses allow all or
2
C-bus programmable logic
2
C-bus address, allowing
Product data sheet

Related parts for pca9635

pca9635 Summary of contents

Page 1

... PWM controller values. The LED output driver is programmed to be either open-drain with current sink capability totem-pole with sink source capability The PCA9635 operates with a supply voltage range of 2 5.5 V and the outputs are 5.5 V tolerant. LEDs can be directly connected to the LED output ( mA, 5 ...

Page 2

... I 4 software programmable I 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 PCA9635s on the I three different addresses so that same time in a group). Software enable and disable for I ...

Page 3

... Type number Topside mark PCA9635PW PCA9635PW PCA9635_5 Product data sheet Package Name Description TSSOP28 plastic thin shrink small outline package; 28 leads; body width 4.4 mm Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Version SOT361-1 © NXP B.V. 2007. All rights reserved ...

Page 4

... INPUT FILTER SDA POWER- RESET V SS REGISTER X BRIGHTNESS CONTROL 24.3 kHz 97 kHz 25 MHz OSCILLATOR OE Remark: Only one LED output shown for clarity. Fig 1. Block diagram of PCA9635 PCA9635_5 Product data sheet C-BUS CONTROL PWM GRPFREQ REGISTER 190 Hz Rev. 05 — 22 March 2007 ...

Page 5

... LED driver 7 14 power supply supply ground 15 O LED driver LED driver LED driver LED driver LED driver 12 Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver SDA 26 SCL LED15 21 LED14 ...

Page 6

... Sub Call address, will reduce the total number of possible addresses even further. 7.1.1 Regular I 2 The I C-bus slave address of the PCA9635 is shown in internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW. Remark: Reserved I with: • ...

Page 7

... Software Reset I The address shown in performed by the master. The Software Reset address (SWRST Call) must be used with R/W = logic 0. If R/W = logic 1, the PCA9635 does not acknowledge the SWRST. See Section 7.6 “Software Reset” Fig 4. Software Reset address Remark: The Software Reset I ...

Page 8

... Control register Following the successful acknowledgement of the slave address, LED All Call address or LED Sub Call address, the bus master will send a byte to the PCA9635, which will be stored in the Control register. The lowest 5 bits are used as a pointer to determine which register will be accessed (D[4:0]). The highest 3 bits are used as Auto-Increment fl ...

Page 9

... LEDOUT0 LEDOUT1 LEDOUT2 LEDOUT3 Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Table 4). When AI[ the Auto-Increment for rollover values. For example, if the Control … … Type Function read/write Mode register 1 read/write ...

Page 10

... PCA9635 does not respond PCA9635 responds PCA9635 does not respond PCA9635 responds PCA9635 does not respond PCA9635 responds PCA9635 does not respond to LED All Call I 1* PCA9635 responds to LED All Call I Value Description 0* reserved 0* reserved 0* group control = dimming. 1 group control = blinking. Rev. 05 — ...

Page 11

... R/W [1] See Section 7.7 “Using the PCA9635 with and without external drivers” [2] Change of the outputs at the STOP command allows synchronizing outputs of more than one PCA9635. Applicable to registers from 02h (PWM0) to 08h (LEDOUT) only. [3] See Section 7.4 “Active LOW output enable input” 7.3.3 PWM0 to PWM15, individual brightness control Table 7 ...

Page 12

... GRPPWM - Group brightness control register (address 12h) bit description Register Bit Symbol GRPPWM 7:0 GDC[7:0] GDC 7:0 = -------------------------- - 256 Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Access Value Description R/W 1111 1111 GRPPWM register © NXP B.V. 2007. All rights reserved ...

Page 13

... LDR4 LEDOUT2 7:6 LDR11 5:4 LDR10 3:2 LDR9 1:0 LDR8 LEDOUT3 7:6 LDR15 5:4 LDR14 3:2 LDR13 1:0 LDR12 Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I Access Value Description R/W 0000 0000* GRPFREQ register 1 (s) Access Value Description R/W 00* LED3 output state control R/W 00* LED2 output state control R/W 00* LED1 output state control ...

Page 14

... C-bus read or write sequence. 2 C-bus address 2 ALLCALLADR - LED All Call I description Register Bit Symbol ALLCALLADR 7:1 AC[7:1] 0 AC[0] 2 C-bus address allows all the PCA9635s in the bus to be programmed Rev. 05 — 22 March 2007 16-bit Fm+ I Access Value Description 2 R/W 1110 001* I C-bus subaddress 1 R only 0* reserved 2 R/W ...

Page 15

... The OE pin can be used as a synchronization signal to switch on/off several PCA9635 devices at the same time. This requires an external clock reference that provides blinking period and the duty cycle. The OE pin can also be used as an external dimming control signal. The frequency of the external clock must be high enough not to be seen by the human eye, and the duty cycle value determines the brightness of the LEDs ...

Page 16

... SWRST Call sequence is not correct. 7.7 Using the PCA9635 with and without external drivers The PCA9635 LED output drivers are 5.5 V only tolerant and can sink the device needs to drive LEDs to a higher voltage and/or higher current, use of an external driver is required. • ...

Page 17

... PWM individual PWM (non-inverted) (non-inverted) off individual PWM (inverted) individual PWM individual PWM (inverted) (inverted) Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver [1] External P-type driver External Firmware pull-up resistor required formulas and LED output state values ...

Page 18

... PWMx GRPPWM) values bits, 256 steps) with 10.73 508 510 512 509 511 PCA9635 2 C-bus LED driver [1] …continued PWMx 002aab417 © NXP B.V. 2007. All rights reserved ...

Page 19

... Product data sheet 2 C-bus Figure SDA SCL data line stable; data valid Figure 8). S START condition Figure 9). Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver 7). change of data allowed mba607 P STOP condition © NXP B.V. 2007. All rights reserved. SDA SCL mba608 ...

Page 20

... TRANSMITTER/ RECEIVER TRANSMITTER RECEIVER data output by transmitter data output by receiver SCL from master 1 S START condition 2 C-bus Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I MASTER MASTER TRANSMITTER/ MULTIPLEXER RECEIVER SLAVE not acknowledge acknowledge 2 8 clock pulse for acknowledgement C-bus LED driver ...

Page 21

... Individual from slave selection brightness registers only Auto-Increment on PWM15 register PWM0 register A acknowledge from slave Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver (1) data for register D[4: acknowledge acknowledge from slave from slave STOP condition 002aac148 ...

Page 22

... START condition (1) In this example, several PCA9635s are used and the same sequence (A) (above) is sent to each of them. (2) ALLCALL bit in MODE1 register is equal to 1 for this example. (3) OCH bit in MODE2 register is equal to 1 for this example. 2 Fig 15. LED All Call I ...

Page 23

... LED11 LED12 A4 LED13 A5 LED14 A6 LED15 V SS 002aac138 2 C-bus (typical) for Fast-mode Plus I Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver C-bus. © NXP B.V. 2007. All rights reserved ...

Page 24

... I SS Rev. 05 — 22 March 2007 16-bit Fm+ I Conditions Min 0 operating 40 Min Typ 2 2.5 - 2.5 - 2.5 - 2.3 - 2.9 - 3.8 [1] - 1.70 SS 0 PCA9635 2 C-bus LED driver Max Unit +6 100 mA 400 mW +150 C +85 C Max Unit 5 15.5 A 2.0 V +0. 5 © ...

Page 25

... Rev. 05 — 22 March 2007 16-bit Fm+ I Min Typ [ [ [ [ 1.6 - 2 2.5 0 3.7 0 3.7 PCA9635 2 C-bus LED driver Max Unit - 400 mA + +0 +0. 5 © NXP B.V. 2007. All rights reserved ...

Page 26

... Input filters on the SDA and SCL inputs suppress noise spikes less than 50 ns. PCA9635_5 Product data sheet Conditions Standard-mode 2 I C-bus Min [1] 0 4.7 4.0 4.7 4.0 0 [2] 0.3 [3] 0.3 250 4.7 4.0 [4][ [ Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Fast-mode Fast-mode 2 I C-bus Plus I Max Min Max Min 100 0 400 0 - 1.3 - 0.5 - 0.6 - 0.26 - 0.6 - 0.26 - ...

Page 27

... Load resistor for LEDn. R for SDA and SCL > less current Load capacitance includes jig and probe capacitance Termination resistance should be equal to the output impedance Z T generators. Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm HD;STA SU;STA SU;STO Sr ...

Page 28

... Rev. 05 — 22 March 2007 16-bit Fm detail 6.6 0.75 0.4 1 0.2 0.13 6.2 0.50 0.3 EUROPEAN PROJECTION PCA9635 2 C-bus LED driver SOT361 ( 0.8 8 0.1 o 0.5 0 ISSUE DATE 99-12-27 03-02-19 © NXP B.V. 2007. All rights reserved ...

Page 29

... Package placement • Inspection and repair • Lead-free soldering versus PbSn soldering 17.3 Wave soldering Key characteristics in wave soldering are: PCA9635_5 Product data sheet Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver © NXP B.V. 2007. All rights reserved ...

Page 30

... Lead-free process (from J-STD-020C) Package reflow temperature ( C) 3 Volume (mm ) < 350 260 260 250 Figure 21. Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Figure 21) than a PbSn process, thus 350 220 220 350 to 2000 > 2000 260 260 250 ...

Page 31

... Printed-Circuit Board Positive-channel Metal Oxide Semiconductor bipolar transistor with P-type emitter and collector and an N-type base Pulse Width Modulation Red/Green/Blue Red/Green/Blue/Amber System Management Bus Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver peak temperature time 001aac844 © NXP B.V. 2007. All rights reserved. ...

Page 32

... SDA and SCL signals modified. 16: added (new) Figure note 1. Product data sheet Product data sheet Objective data sheet Objective data sheet Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver Change notice Supersedes - PCA9635_4 - PCA9635_3 - PCA9635_2 - PCA9635_1 - - © NXP B.V. 2007. All rights reserved ...

Page 33

... Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners C-bus — logo is a trademark of NXP B.V. http://www.nxp.com salesaddresses@nxp.com Rev. 05 — 22 March 2007 PCA9635 2 16-bit Fm+ I C-bus LED driver © NXP B.V. 2007. All rights reserved ...

Page 34

... SUBADR1 to SUBADR3, I subaddress 7.3.8 ALLCALLADR, LED All Call I address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 7.4 Active LOW output enable input . . . . . . . . . . . 15 7.5 Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . 15 7.6 Software Reset . . . . . . . . . . . . . . . . . . . . . . . . 16 7.7 Using the PCA9635 with and without external drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7.8 Individual brightness control with group dimming/blinking . . . . . . . . . . . . . . . . . . . . . . . Characteristics of the I 8.1 Bit transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8.1.1 START and STOP conditions . . . . . . . . . . . . . 19 8.2 System confi ...

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