SLUUCF3A December   2020  – October 2021 BQ25672

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 I/O Descriptions
    3. 1.3 Recommended Operating Conditions
  3. 2Test Setup and Results
    1. 2.1 Equipment
    2. 2.2 Equipment Setup
    3. 2.3 Software Setup
      1. 2.3.1 BQSTUDIO using EV2400
      2. 2.3.2 TI Charger GUI for USB2ANY
    4. 2.4 Test Procedure
      1. 2.4.1 Initial Settings
      2. 2.4.2 Communication Verification
      3. 2.4.3 Charge Mode Verification
      4. 2.4.4 OTG Mode Verification
  4. 3PCB Layout Guidelines
  5. 4Board Layout, Schematic and Bill of Materials
    1. 4.1 BMS034E1 Board Layout
    2. 4.2 BQ25672EVM (BMS034E1-004) Schematic
    3. 4.3 Bill of Materials
  6. 5Revision History

1.2 I/O Descriptions

Table 1-2 lists the BQ25672EVM board connections and ports.

Table 1-2 EVM Connections
Connector, Port Description
J1 VIN1 Positive rail of the priority input adapter or power supply
GND Ground
J2 VIN2 Positive rail of the secondary input adapter or power supply
GND Ground
J3 SYSTEM Positive rail of the charger system output voltage, typically connected to the system load
GND Ground
J4 VPMID Positive rail of the charger output voltage for reverse mode (OTG). This output also shares the rail with VBUS in forward mode
GND Ground
J5 BATTERY Positive rail of the charger battery input
SNS_BATP Input connected to the positive terminal of the battery for remote battery voltage measurement
GND Ground
J6 USB port N/A
J7 EXTERNAL THERMISTOR Input connected to an external battery temperature sensing thermistor
GND Ground
J8 Communication port I2C communication port for use with the EV2300/2400 Interface Board
J9 Communication port I2C communication port for use with the USB2ANY Interface Adapter (for future use)

Table 1-3 lists the shunt installations available on the EVM, and their respective descriptions.

Table 1-3 EVM Shunt and Switch Installation
Shunt Description BQ25672 Setting
JP1 ACDRV1 pin connection to control ACFET1-RBFET1. Connect this to _acdrv1 when utilizing the input protection MOSFETs. Connect this to GND when input protection MOSFETs are not utilized or bypassed ACDRV1 to _acdrv1
JP2 ACDRV2 pin connection to control ACFET2-RBFET2. Connect this to _acdrv2 when utilizing the input protection MOSFETs. Connect this to GND when input protection MOSFETs are not utilized or bypassed ACDRV2 to _acdrv2
JP3 VIN1/VAC1 to VBUS bypass connection. Connect this when the input protection MOSFET feature is not desired. This will connect the input source on VIN1 to VBUS. Not Installed
JP4 VIN2/VAC2 to VBUS bypass connection. Connect this when the input protection MOSFET feature is not desired. This will connect the input source on VIN2 to VBUS. Not Installed
JP5 BAT to BATTERY bypass connection. Connect this when the ship and shutdown mode features are not desired. Not Installed
JP6 N/A Installed
JP7 USB port J6 positive rail to charger VBUS selection. Use shunt to select either VIN1/VAC1 or VIN2/VAC2 as the connection for the USB port. USB_VIN to VAC1
JP8 SDRV pin connection to control SFET. Disconnect when ship and shutdown mode features are not desired. Not Installed
JP9 BATP pin connection. BATP is always connected to J5 pin 2 for remote battery sense. If remote sense is not used, short pin 1 to J5 pin 1 (BATTERY) for the charger constant voltage sensing to occur at the connector pin or short pin 2 to pin 3 (BAT pin) for the charger constant voltage sensing to occur on the PCB board. Do not leave BATP pin floating. Short pin 1 to J5 pin 1 (BATTERY)
JP10 Do not remove Installed
JP11 N/A Installed
JP12 REGN to TS resistor divider network connection. This must remain connected. Installed
JP13 ILIM_HIZ pin setting for 500 mA. Connect to set the external input current limit setting to 500mA Not Installed
JP14 ILIM_HIZ pin setting for 1.5 A. Connect to set the external input current limit setting to 500mA Installed
JP15 Thermistor COOL temperature setting. Connect jumper to simulate charger entering TCOOL (T1-T2) temperature region. Not Installed
JP16 Thermistor COLD temperature setting. Connect jumper to simulate charger entering TCOLD (<T1) temperature region. Not Installed
JP17 CE pin connection to ground to enable charging. When removed, CE pin will pull up to disable charge Installed
JP18 Thermistor NORMAL temperature setting. Connect jumper to simulate charger entering TNORMAL (T2-T3) temperature region. Keep connected when testing other termistor temperature settings (JP17 - TCOOL, JP18 - TCOLD, JP21 - TWARM, JP22 - THOT). Remove this jumper whenever using an externally connected thermistor. Installed
JP19 Thermistor WARM temperature setting. Connect jumper to simulate charger entering TWARM (T3-T5) temperature region. Not Installed
JP20 Thermistor HOT temperature setting. Connect jumper to simulate charger entering THOT (>T5) temperature region. Not Installed
JP21 ILIM_HIZ pin setting for HIZ mode. Connect to enter the charger high impedance (HIZ) mode to disable the converter Not Installed
JP22 PROG pin setting for 1S, 1.5 MHz. Connect to configure charger default setting to 1S charge regulation voltage, 2 A charging current, and 1.5 MHz switching frequency Not Installed
JP23 PROG pin setting for 1S, 750 kHz. Connect to configure charger default setting to 1S charge regulation voltage, 2 A charging current, and 750 kHz switching frequency Not Installed
JP24 PROG pin setting for 2S, 1.5 MHz. Connect to configure charger default setting to 2S charge regulation voltage, 2 A charging current, and 1.5 MHz switching frequency Installed
JP25 PROG pin setting for 2S, 750 kHz. Connect to configure charger default setting to 2S charge regulation voltage, 2 A charging current, and 750 kHz switching frequency Not Installed
JP26 PROG pin setting for 3S, 1.5 MHz. Connect to configure charger default setting to 3S charge regulation voltage, 1 A charging current, and 1.5 MHz switching frequency Not Installed
JP27 PROG pin setting for 3S, 750 kHz. Connect to configure charger default setting to 3S charge regulation voltage, 1 A charging current, and 750 kHz switching frequency Not Installed
JP28 PROG pin setting for 4S, 1.5 MHz. Connect to configure charger default setting to 4S charge regulation voltage, 1 A charging current, and 1.5 MHz switching frequencyv Not Installed
JP29 PROG pin setting for 4S, 750 kHz. Connect to configure charger default setting to 4S charge regulation voltage, 1 A charging current, and 750 kHz switching frequency Not Installed
JP30 Input connection for onboard PULLUP rail LDO. Connect to power onboard 3.3V pullup rail. LDO input will be connected via diode-OR between VBUS and BAT Installed
JP31 EV2400 internal pullup to PULLUP connection. Connect to use EV2400 internal 3.3 V pullup to drive the EVM PULLUP rail (1) Not Installed
JP32 STAT pin LED indicator connection. This indicates the current charger Status Installed
JP33 USB2ANY internal pullup to PULLUP connection. Connect to use the USB2ANY internal 3.3 V pullup to drive the EVM PULLUP rail Not Installed
S1 QON control switch. Press to either exit Ship Mode or reset the System Power Default Off
1. EV2400 internal 3.3V pullup rail is not active by default. Requires modification to the internal circuit of the EV2400.