Description

PCA9685 16-channel 12-bit Fm+I2C bus PWM controller servo control module

Features

16 LED drivers, each output can be programmed as:

close

open

　　 Programmable LED brightness

　　 Programmable group blur (dim)/flicker and independent LED brightness mixing

1MHz Fast Mode Plus is compatible with I2C bus interface with 30mA high drive capability on SDA to drive high capacitive bus

Each LED output can achieve 4096-level (12-bit) linear programmable brightness from completely off (default) to brightness

16 push-pull outputs that can be software-programmed as open-drain LED output selection (the default is push-pull) (can absorb 25mA sink current and provide 10mA source current under 5V), no input function

The output status can be programmed to change when answering or stopping the command, so as to update all outputs at the same time or byte-by-byte to update the output (the default is "stop command change")

Low effective output enable input pin. When this pin is high, the LED output can be programmed to be 0, 1 or high impedance state (the default is high impedance state after power-on)

6 hardware address pins make it possible to connect 62 PCA9685 devices on the same I2C bus

LED output frequency (all LEDs) is usually 40Hz to 1000Hz (when the oscillator is 25MHz, the default value of the prescaler register is 1EH, which will generate a refresh frequency of 200Hz)

Four software programmable I2C bus addresses (one LED group call (Call) address and three LED sub-call (Call) addresses) enable the device group to be addressed at the same time in any combination (for example, a certain register is used for " All call (All Call)" then all PCA9634 devices on the I2C bus can be addressed at the same time, and the second register is used for three different addresses, then 1/3 of the devices on the bus in a device group can be addressed Addressed at the same time), the I2C bus address can be enabled and disabled by software

The software reset feature (SWRST Call) enables the device to be reset via the I2C bus

25MHz internal crystal oscillator, no external components required

Allow 50MHz external input clock

Internal power-on reset

Noise filter on SDA/SCL input

Output pin has edge generation rate control

No glitch output when power on

Support hot access

Low standby current

Operating voltage range: 2.3V to 5.5V

Can withstand 5.5V input

Can work in an environment of minus 40 degrees Celsius to 85 degrees Celsius

ESD protection exceeds 2000V HBM/JESD22-A114, 200V MM/JESD22-A115 and 1000V CDM/JESD22-C101

JEDEC standard JESD78 enters the lockout test when it exceeds 100mA

Package: TSSOP28 and HVQFN28