SLUUC51D june   2020  – july 2023 BQ25790

 

  1.   1
  2.   BQ25790EVM (BMS027) Evaluation Module User's Guide
  3.   Trademarks
  4.   4
  5. 1Introduction
    1. 1.1 EVM Features
    2. 1.2 I/O Descriptions
    3. 1.3 Recommended Operating Conditions
  6. 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
  7. 3PCB Layout Guidelines
  8. 4Board Layout, Schematic and Bill of Materials
    1. 4.1 Schematic
    2. 4.2 Board Layout
    3. 4.3 Bill of Materials
  9. 5Revision History

1.2 I/O Descriptions

Table 1-2 lists the BQ25790EVM board connections and ports.

Table 1-2 EVM Connections
Connector/PortDescription
J1VIN1Positive rail of the priority input adapter or power supply
GNDGround
J2VIN2Positive rail of the secondary input adapter or power supply
GNDGround
J3SYSTEMPositive rail of the charger system output voltage, typically connected to the system load
GNDGround
J4VPMIDPositive rail of the charger output voltage for reverse mode (OTG). This output also shares the rail with VBUS in forward mode
GNDGround
J5BATTERYPositive rail of the charger battery input
SNS_BATPInput connected to the positive terminal of the battery for remote battery voltage measurement
SNS_BATNInput connected to the negative terminal of the battery for remote battery voltage measurement
GNDGround
J6USB portUSB Micro B port used for input source type detection and handshaking. Connected to either VIN1 or VIN2
J7EXTERNAL THERMISTORInput connected to an external battery temperature sensing thermistor
GNDGround
J8Communication portI2C communication port for use with the EV2300/2400 Interface Board
J9Communication portI2C communication port for use with the USB2ANY Interface Adapter

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

Table 1-3 EVM Shunt and Switch Installation
ShuntDescriptionBQ25790 Setting
JP1ACDRV1 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
JP2ACDRV2 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
JP3VAC1 to VBUS bypass connection. Connect this when the input protection MOSFET feature is not desired. This connects the input source on VIN1 to VBUS.Not Installed
JP4VAC2 to VBUS bypass connection. Connect this when the input protection MOSFET feature is not desired. This connects the input source on VIN2 to VBUS.Not Installed
JP5BAT to BATTERY bypass connection. Connect this when the ship and shutdown mode features are not desired.Not Installed
JP6USB Micro B input D- connection to charger D- pin. Connect this when the input source detection and handshake features are desired.Installed
JP7USB input positive rail to charger input selection. Connect this to VAC1 to connect the USB input to the priority input rail.USB_VIN to VAC1
JP8Charger D+ and D- pin short connection. Connect this to simulate a DCP type adapter for the input source detection and handshake feature.Not Installed
JP9BATP pin to BATTERY connection. Connect this when remote battery terminal sensing is not desired and ship and shutdown mode features are being utilized. Do not connect if JP13 is shunt is connected.Installed
JP10USB Micro B input D+ connection to charger D+ pin. Connect this when the input source detection and handshake features are desired.Installed
JP11SDRV pin connection to control SFET. Disconnect when ship and shutdown mode features are not desired.Installed
JP12BATN pin to PGND connection. Connect this when remote battery terminal sensing is not desired.Installed
JP13BATP pin to BAT connection. Connect this when remote battery terminal sensing is not desired and ship and shutdown mode features are not being utilized. Do not connect if JP9 is shunt is connected.Not Installed
JP14REGN to TS resistor divider network connection. This must remain connected.Installed
JP15ILIM_HIZ pin setting for 500 mA. Connect to set the external input current limit setting to 500 mA.Not Installed
JP16ILIM_HIZ pin setting for 1.5 A. Connect to set the external input current limit setting to 500 mA.Installed
JP17Thermistor COOL temperature setting. Connect jumper to simulate charger entering TCOOL (T1-T2) temperature region.Not Installed
JP18Thermistor COLD temperature setting. Connect jumper to simulate charger entering TCOLD (<T1) temperature region.Not Installed
JP19CE pin connection to ground to enable charging. When removed, CE pin pulls up to disable charge.Installed
JP20Thermistor NORMAL temperature setting. Connect jumper to simulate charger entering TNORMAL (T2-T3) temperature region. Keep connected when testing other thermistor temperature settings (JP17 - TCOOL, JP18 - TCOLD, JP21 - TWARM, JP22 - THOT). Remove this jumper whenever using an externally connected thermistor.Installed
JP21Thermistor WARM temperature setting. Connect jumper to simulate charger entering TWARM (T3-T5) temperature region.Not Installed
JP22Thermistor HOT temperature setting. Connect jumper to simulate charger entering THOT (>T5) temperature region.Not Installed
JP23ILIM_HIZ pin setting for HIZ mode. Connect to enter the charger high impedance (HIZ) mode to disable the converter.Not Installed
JP24PROG 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
JP25PROG 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 frequencyNot Installed
JP26PROG 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 frequencyInstalled
JP27PROG 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 frequencyNot Installed
JP28PROG 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 frequencyNot Installed
JP29PROG 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 frequencyNot Installed
JP30PROG 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 frequencyNot Installed
JP31PROG 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 frequencyNot Installed
JP32Input connection for onboard PULLUP rail LDO. Connect to power onboard 3.3-V pull-up rail. LDO input is connected through diode-OR between VBUS and BAT.Installed
JP33EV2400 internal pull up to PULLUP connection. Connect to use EV2400 internal 3.3-V pull up to drive the EVM PULLUP rail.(1)Not Installed
JP34PG pin LED indicator connection. On PG enabled chargers, this indicates the Power Good status.Installed
JP35STAT pin LED indicator connection. This indicates the current charger status.Installed
JP36USB2ANY internal pull up to PULLUP connection. Connect to use the USB2ANY internal 3.3-V pull up to drive the EVM PULLUP rail.Not Installed
S1QON control switch. Press to either exit Ship Mode or reset the System Power.Default Off
(1) EV2400 internal 3.3-V pullup rail is not active by default. Requires modification to the internal circuit of the EV2400.