RAK14001 WisBlock RGB LED Module Datasheet

Overview

Description

The RAK14001 is an RGB LED module that can be mounted to the IO slot of the WisBlock Base board. It is capable of driving RGB LEDs with up to 20 mA per segment via the I2C interface. The main component of this module is the NCP5623B from On Semiconductors. This IC has a built−in DC/DC converter that works as a high-efficiency charge pump providing the required DC voltage for all three LED segments. There is also an IREF pin that provides the reference current based on the internal band−gap voltage reference to control the output current flowing in the LED.

Features

• 2.7 V - 4.2 V input voltage range
• RGB Function Fully Supported
• Programmable Integrated Gradual Dimming
• Support I2C Protocol
• Support enable power supply
• Chipset: On Semiconductors NCP5623B
• Module size: 25 X 35 mm

Specifications

Overview

Mounting

The RAK14001 module can be mounted on the IO slot of the WisBlock Base board. Figure 1 shows the mounting mechanism of the RAK14001 on a WisBlock Base module, such as the RAK5005-O.

Figure 1: RAK14001 mounting mechanism on a WisBlock Base module

Hardware

The hardware specification is categorized into four (4) parts. It discusses the pinouts and its corresponding functions, and diagrams of the module. It also covers the electrical and mechanical characteristics that include the tabular data of the functionalities and standard values of the RAK14001 WisBlock RGB LED Module.

Chipset

Vendor	Part number
On Semiconductors	NCP5623B

Pin Definition

The RAK14001 WisBlock module has a 40-pin WisConnector that is compatible to the WisBlock Base IO Slot. The pin order of the connector and the pinout definition is shown in Figure 2.

Figure 1: RAK14001 Pinout Schematic

NOTE

• I2C related pins, EN, VBAT, 3V3, and GND are connected to this module.
• EN is connected to power chip enable pin, High active. VBAT is battery voltage, maximum of 4.2 V.

Electrical Characteristics

This section shows the maximum and minimum ratings of the RAK14001 module and its recommended operating conditions.

Recommended Operating Conditions

Symbol	Description	Min.	Nom.	Max.	Unit
VBAT	Battery power supply	2.7	-	4.2	V
Icc	Operating Current@Iout = 0mA		350		uA
Istb	Stand by Current		0.8	1.0	uA

Mechanical Characteristics

Board Dimensions

The mechanical dimensions of the RAK14001 module is shown in Figure 3 below.

Figure 1: RAK14001 Mechanical Dimensions

WisConnector PCB Layout

Figure 1: WisConnector PCB footprint and recommendations

Schematic Diagram

Figure 5 shows the schematic of the RAK14001 module.

Figure 1: RAK14001 WisBlock Module Schematics

Power Supply

Figure 6 shows the RAK14001 RGB LED driver chip power supply.

Figure 1: RAK14001 WisBlock RGB LED Driver Power Supply

LED Driver

Figure 7 shows the RGB LED driver schematic, R8 provides the reference current for LED 1 to LED 3 pins.

Figure 1: RAK14001 WisBlock RGB LED Driver Schematic