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PCA9624 데이터시트 PDF




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부품번호 PCA9624 기능
기능 8-bit Fm I2C-bus 100 mA 40 V LED driver
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PCA9624 데이터시트, 핀배열, 회로
PCA9624
8-bit Fm+ I2C-bus 100 mA 40 V LED driver
Rev. 02 — 26 August 2009
Product data sheet
1. General description
The PCA9624 is an I2C-bus controlled 8-bit LED driver optimized for voltage switch
dimming and blinking 100 mA Red/Green/Blue/Amber (RGBA) LEDs. 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 PCA9624 operates with
a supply voltage range of 2.3 V to 5.5 V and the 100 mA open-drain outputs allow
voltages up to 40 V.
The PCA9624 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) blinks all the LED outputs and can be used
to externally PWM the outputs, which is useful when multiple devices need to be dimmed
or blinked together without using softwarewww.DataSheet.net/ control.
Software programmable LED Group and three Sub Call I2C-bus addresses allow all or
defined groups of PCA9624 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 PCA9624
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.
The PCA9624 and PCA9634 software is identical and if the PCA9624 on-chip 100 mA
NAND FETs do not provide enough current or voltage to drive the LEDs, then the
PCA9634 with larger current or higher voltage external drivers can be used.
Datasheet pdf - http://www.DataSheet4U.co.kr/




PCA9624 pdf, 반도체, 판매, 대치품
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PCA9624
SCL
SDA
INPUT FILTER
VDD
VSS
POWER-ON
RESET
A0 A1 A2 A3 A4 A5 A6
I2C-BUS
CONTROL
PWM
REGISTER X
BRIGHTNESS
CONTROL
LED
STATE
SELECT
REGISTER
97 kHz
24.3 kHz
25 MHz
OSCILLATOR
GRPFREQ
REGISTER
190 Hz
OE
GRPPWM
REGISTER
MUX/
CONTROL
'0' – permanently OFF
'1' – permanently ON
FET
DRIVER
LEDn
002aad591
Remark: Only one LED output shown for clarity.
Fig 1. Block diagram of PCA9624

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PCA9624 전자부품, 판매, 대치품
NXP Semiconductors
PCA9624
8-bit Fm+ I2C-bus 100 mA 40 V LED driver
The last bit of the address byte defines the operation to be performed. When set to logic 1
a read is selected, while a logic 0 selects a write operation.
7.1.2 LED All Call I2C-bus address
Default power-up value (ALLCALLADR register): E0h or 1110 000
Programmable through I2C-bus (volatile programming)
At power-up, LED All Call I2C-bus address is enabled. PCA9624 sends an ACK when
E0h (R/W = 0) or E1h (R/W = 1) is sent by the master.
See Section 7.3.8 “ALLCALLADR, LED All Call I2C-bus address” for more detail.
Remark: The default LED All Call I2C-bus address (E0h or 1110 000) must not be used
as a regular I2C-bus slave address since this address is enabled at power-up. All the
PCA9624s on the I2C-bus will acknowledge the address if sent by the I2C-bus master.
7.1.3 LED Sub Call I2C-bus addresses
3 different I2C-bus addresses can be used
Default power-up values:
SUBADR1 register: E2h or 1110 001
SUBADR2 register: E4h or 1110 010
SUBADR3 register: E8h or 1110 100
Programmable through I2C-bus (volatile programming)
At power-up, Sub Call I2C-bus addresseswww.DataSheet.net/ are disabled. PCA9624 does not send an
ACK when E2h (R/W = 0) or E3h (R/W = 1), E4h (R/W = 0) or E5h (R/W = 1), or
E8h (R/W = 0) or E9h (R/W = 1) is sent by the master.
See Section 7.3.7 “SUBADR1 to SUBADR3, I2C-bus subaddress 1 to 3” for more detail.
Remark: The default LED Sub Call I2C-bus addresses may be used as regular I2C-bus
slave addresses as long as they are disabled.
7.1.4 Software Reset I2C-bus address
The address shown in Figure 5 is used when a reset of the PCA9624 needs to be
performed by the master. The Software Reset address (SWRST Call) must be used with
R/W = logic 0. If R/W = logic 1, the PCA9624 does not acknowledge the SWRST. See
Section 7.6 “Software reset” for more detail.
R/W
00000110
002aab416
Fig 5. Software Reset address
Remark: The Software Reset I2C-bus address is a reserved address and cannot be used
as a regular I2C-bus slave address or as an LED All Call or LED Sub Call address.
PCA9624_2
Product data sheet
Rev. 02 — 26 August 2009
© NXP B.V. 2009. All rights reserved.
7 of 37
Datasheet pdf - http://www.DataSheet4U.co.kr/

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