PM-BAT power module datasheet
Overview
The Particle PM-BAT power module is a small module that contains:
- 5V to 17VDC input
- 3.3V regulated output for MCU (2A)
- 3.9V output for cellular modem (2A)
- bq24195 PMIC (power management and charge controller)
- MAX17043 fuel gauge (LiPo battery charge sensor)
It can either be:
- A castellated module intended to be reflow soldered to your M.2 SoM base board
- A module with male pins on the bottom that can be plugged into a socket on your M.2 SoM base board
The PM-DC power module is also available if you do not need battery support and want to power from an external DC source.
Block diagram
![Dimensions](/assets/images/power-module/pm-bat-block-diagram.png)
Dimensions
![Dimensions](/assets/images/power-module/power-module-dimensions.png)
Dimensions in mm
- Module is 35mm x 22.86mm (1.38" x 0.9")
- Pins and castellated holes are 2.54mm (0.1") apart
Pinout
Pin | Pin Name | Description |
---|---|---|
1 | 3V3 | Power output 3.3V |
2 | 3V3_AUX | Power output 3.3V, controllable |
3 | 5V | Power output 5V (not available on this module) |
4 | 5V | Power output 5V (not available on this module) |
5 | VCC | Power output 3.9V 2A for cellular modem |
6 | VCC | Power output 3.9V 2A for cellular modem |
7 | EN_AUX | Enable 33_AUX (has 100K pull-down to default off) |
8 | REGN | PMIC REGN output used for temperature sensor |
9 | GND | Ground |
10 | GND | Ground |
11 | VIN | Power in 5V - 17V |
12 | VIN | Power in 5V - 17V |
13 | CHG | Charge indicator output |
14 | SCL | I2C SCL. No internal pull on power module. |
15 | SDA | I2C SDA. No internal pull on power module. |
16 | /FUEL_INT | PMIC and FUEL_INT interrupt output open drain. Connect to M.2 SoM pin 45 (A6) for both B-SoM and M-SoM. |
17 | TS | LiPo battery temperature sensor (NTC thermistor) |
18 | VBAT | LiPo battery connection 3.7V |
19 | VBAT | LiPo battery connection 3.7V |
20 | VBAT | LiPo battery connection 3.7V |
21 | GND | Ground |
22 | GND | Ground |
23 | /RST | MCU reset button, active low. |
24 | PG | Power good output. Open drain, is pulled low on failure of either regulator. |
25 | ENABLE | Power output enable. Has internal pull-up to VSYS, pull to GND to disable power outputs. |
3V3_AUX
is powered by 3V3
via a load switch (TPS22918). It can supply up to the full 2A of 3V3
. It defaults to off due to a pull-down resistor on the pin. Pull to 3V3
to enable the 3V3_AUX
output.
The I2C connection is required; the module will not operate correctly without configuration by I2C to adjust the input current limit and other settings.
The /FUEL_INT
is an open-drain output that goes low if the PMIC or fuel gauge chip signals an interrupt
condition. This should be connected to M.2 SoM pin 45 (A6) for both B-SoM and M-SoM. On the M-SoM, pin A6
pin cannot wake the M-SoM from hibernate sleep mode, but can wake from stop or ULP sleep modes.
Land pattern (SMD)
![Land pattern](/assets/images/power-module/power-module-land.png)
Dimensions in mm
Pin layout
![Pin pattern](/assets/images/power-module/power-module-pin.png)
Dimensions in mm
- Male header pins are 0.1" spacing, 12 or 13 pins per side
- Two rows, spaced 0.8" (20.32mm) apart
The mating header is available from a large number of suppliers in both PTH and SMD styles.
Style | Manufacturer | Model | Example |
---|---|---|---|
PTH (12) | Sullins | PPTC121LFBN-RC | Digikey |
PTH (13) | Sullins | PPTC131LFBN-RC | Digikey |
SMD (12) | Sullins | NPTC121KFXC-RC | Digikey |
SMD (13) | Sullins | NPTC131KFXC-RC | Digikey |
Schematic
Battery temperature sensor
The power module PM-BAT can work with or without a battery temperature sensor.
Without a temperature sensor
Leave the power module TS pin unconnected. Charging will always be enabled in hardware, but you can still control charging in software if you wish to do so.
With a temperature sensor
Connect the power module TS pin to a voltage divider as shown here:
![Parallel resistors](/assets/images/power-module/pm-bat-resistors.png)
The values for your resistors can be used to control the charge temperature range using the calculator tool below.
Calculator
When calculating based on resistance, this formula from the bq24195 datasheet is used:
This graph shows the relationship between VLTF, VHTF, and VTCO. Note that since the thermistor is NTC (negative temperature coefficient), higher voltages indicate lower temperatures.
Ordering information
SKU | Description | Lifecycle |
---|---|---|
PMBATH1EA | Particle Power Module, Battery, with Header | In development |
PMBATH1TY | Particle Power Module, Battery, with Header | In development |
PMBATNH1EA | Particle Power Module, Battery, No Header | In development |
PMBATNH1TY | Particle Power Module, Battery, No Header | In development |
Version history
Revision | Date | Author | Comments |
---|---|---|---|
pre | 2024-02-27 | RK | Initial version |
2024-02-28 | RK | Added plug-in version | |
2024-03-12 | RK | Updated to v2, dimensions changed | |
2024-04-08 | RK | Updated to v4, pin changes | |
2024-04-15 | RK | Corrected the /FUEL_INT pin description | |
001 | 2024-06-27 | RK | Initial version |