1.3 Recommended Operating Conditions
Table 1-4. Recommended Operating Conditions
Description
Min
Typ
Max
Unit
V(VINx) at J1 or J2
Power supply voltage to the external blocking FETs
which allow power to VBUS pin
3.6
24
V
I(INx) into J1 or J2
Power supply current, which can be limited by charger's
input current limit feature (IINDPM)
0.01
3.3
A
V(BATTERY) voltage at J5 Battery voltage supported for precharge
2.2
3.8(1S), 7.6(2S),
11.4(3S), 15.2V(4S)
18.8
V
I(BATTERY) out of/into J5
Battery charge current
0.01
2 (1S, 2S), 1(3S, 4S)
5
A
V(SYS) at J3
System voltage regulation range
3.2
19
V
I(SYS) out of J3
System load current
0
5
A
Note
If hotplugging adaptors with voltage greater than 15 volts, it is reccomended to install RSNUB1,
CSNUB1, RSNUB2, and CSBUB2 as listed on the schematic.
Note
If hotplugging 4S batteries and a shipFET is installed, it is reccomended to install component CSNUB3
as listed on the schematic
Note
If hotplugging 4S batteries and a shipFET is not installed, it is reccomended to install component
DVTS as listed on the schematic.
2 Test Setup and Results
2.1 Equipment
This section includes a list of supplies required to perform tests on the BQ25790EVM.
1.
Power Supplies for VBUS pin:
Power Supply #1 (PS1): A power supply capable of supplying up to 24 V at
3 A is required.
2.
Battery Simulator for BAT pin:
Load #1 (4-Quadrant Supply): A "Kepco" Load, BOP, 20-5M, DC 0 to ±20 V,
0 to ±6 A (or higher) or a Keithley 2450 3-A sourcemeter. When using both, a 1000-µF or higher, low ESR,
25-V rated or higher connected at the EVM battery and ground terminals is recommended.
Alternative Option: A 0–20 V/0–5 A, > 60-W DC electronic load set in a constant voltage loading mode in
parallel with a second power supply can be used. The second power supply is set to a voltage slightly below
the electronic load's constant voltage setting. When enabled, the charger's charge current then replaces the
current provided the second power supply.
3.
System load simulator for SYS pin:
Load #2 ( Electronic load set to constant resistance or Resistive Load):
10 Ω, 5 W (or higher).
4.
Meters:
(6x) "Fluke 75" multimeters, (equivalent or better).
Alternative Option: (4x) equivalent voltage meters and (2x) equivalent current meters. The current meters
must be capable of measuring at least 5 A. If used in series between the PS#1, Load#1 or Load#2, the
meters should be set for manual not auto ranging. Current meters add significant series resistance which
affects charger performance.
5.
Computer:
A computer with at least one USB port and a USB cable. A valid internet connection is required
when using the GUI Composer application.
6.
PC Communication Interface:
EV2300/2400 USB-Based PC Interface Board (when using Battery
Management Studio) or USB2ANY Interface Adapter (when using the GUI Composer application).
2.2 Equipment Setup
Use the following list to set up the EVM testing equipment. Refer to
for the test setup connections to
the EVM:
Introduction
6
BQ25792EVM, BQ25798EVM and BQ25798BKUPEVM (BMS034) Evaluation
Module
SLUUCB5E – JUNE 2020 – REVISED JULY 2022
Copyright © 2022 Texas Instruments Incorporated