Data Sheet
Table Of Contents
IDC7 Bluetooth Module
Model: IDC747
Page: 7 Copyright IOT747 Ref: IDC747-DTS-V003
IOT747, 122 Ross Street, Cambridge, CB1 3BU, United Kingdom
Check www.iot747.com for updates. Email: info@iot747.com Back to TOC
IDC747 Module
Product Information Data Sheet
Ref: IDC747-DTS-V003
Latest Update: July 20, 2021
122 Ross Street, CB13BU
Cambridge, United Kingdom
www.iot747.com
Hardware Design Guidelines
The IDC747 is typically powered by a fixed 3V supply where the module is included in a
larger portable device and charging of the battery is supported by alternative functionality
outside the remit of the IDC747. This is the Fixed Voltage Supply Configuration.
Alternatively, for portable applications, the module supports an internal charger function
where no extra external components are required for charging operation. In this case, the
main power is supplied by a battery, typically a Li Po cell with a nominal 3.1-3.3V supply. A
5V charger input, typically supplied by a USB source, is used to charge the battery. The
IDC747 integrated Li-Ion charger is designed to support single Li-Ion cells with a wide range
of cell capacities and variable V
FLOAT
voltages. It supports charge rates of 2mA to 200mA
with no additional external components required. This is the Battery Voltage Supply
Configuration.
Fixed Voltage Supply Configuration
In the fixed voltage configuration, the pins VBAT, VBAT_SENSE and VDD_PADS are all
connected to a single supply voltage rail. VCHG and VCHG_SENSE and CHG_EXT are left
unconnected as per the figure below. Alternatively, we recommend connecting them to test
points if possible. Test points can help debug and testing in some cases prior to production.
Pin #
Pin Name
Connection
Voltage Input Range
25
CHG_EXT
Not Connected/Test Point
NA
26
VCHG
Not Connected/Test Point
NA
27
VBAT_SENSE
Connect to 3.3V Supply
3.0V** to 4.6V
28
VBAT
Connect to 3.3V Supply
3.0V** to 4.6V
29
VDD_PADS
Connect to 3.3V Supply
1.7V to 3.6V
30
VCHG_SENSE
Not Connected/Test Point
NA
** Devices operates down to 2.8V recommended software shut off is at 3.0V