u-blox XPLR-IOT-1, User Manual

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XPLR-IOT-1 - User guide
UBX-21035674 - R03 Platform description Page 11 of 42
C1-Public
XPLR-IOT-1 contains a DTP 603450 style lithium-polymer (Li-Po) battery with a nominal voltage of
3.7 VDC and capacity of 1000 mAh. An integral battery protection system (BPS) protects against
shorts, overcurrent, overcharging, and overloads. The battery is connected to the charger through a
BQ27421-G1
Battery gauge . From the factory, the battery has an approximate 20% charge to allow
for shipping.
⚠
Disconnect and remove battery from the PCBA before performing any soldering operations.
⚠
When first using XPLR-IOT-1, connect it to a USB host or a USB power supply to fully charge the
battery after shipment.
3.2.1 Power and charging status
The bi-color LED, D29, shows power and charging status of XPLR-IOT-1. The LED is visible through
the side panel of XPLR-IOT-1 case, as shown in
Figure 3 . Table 2 describes the CHG/PWR LED states.
USB power Power switch Charge state CHG/PWR LED state
Disconnected Off Any charge or battery disconnected Off
Disconnected On VBAT ≥ 3.2 VDC Green
Disconnected On VBAT ≤ 3.2 VDC (discharged) Off
Connected Off Charging Red
Connected Off Fully charged or battery disconnected Off
Connected On Charging Amber
Connected On Fully charged or battery disconnected Green
Table 2: CHG/PWR LED states
☞
XPLR-IOT-1 can be powered by USB alone if the battery is unplugged or removed.
⚠
To prevent an inrush of USB power current spikes, the battery must be present when using SARA.
3.2.2 Power supplies
When plugged in, USB power is always available to the charger and battery subsystem. SW1, located
on the side panel of the PCBA, is the main power switch for the remainder of the system. The battery
voltage is regulated down to 3.3 VDC and distributed to the remainder of the PCBA.
Module Idle current (mA, avg.) 3 Transmit current (mA, max) Remarks
Base system with NORA-B1 61.1 n/a Includes any LED current
NORA-B1 3.3 5.3 (3 dBm TX power)
NINA-W15 33 120 (15 dBm TX power)
SARA-R5 30 395 (23 dBm TX power)
MAX-M10 13 n/a
Table 3: Idle and transmit current at measurement jumpers
Available battery charging current = 500 – (I
BASE with NORA-B1
+ I
NINA-W15
+ I
SARA-R5
+ I
MAX-M10
) mA
3 Idle current for all modules is not optimized at the time of publication.