Cascade Dual Charger Reference Design for 1S Li-Ion Battery Powered End Equipment
PMP15011
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Key Document

Description

Smartphones and other handheld equipment with 3AHr+ 1S Li-Ion batteries require 3-A+ charger current for fast charging.  Parallel chargers allow for high charge currents, resulting in shorter charge times, while distributing the heat losses across the end equipment PCB, thereby preventing hotspots.  In cascade configuration, with PMID pin of master charger connected to VBUS of slave charger, input current limit management is handled through the master charger, thereby simplifying software development.  

Features
  • Master charger: provide system power, charging current, supplement mode, temperature profile and 2.4A USB on-the-go boost current in 4mm x 4mm QFN package
  • Slave charger: only provide extra fast charge current, up to 3A in 2.8mm x 2.5mm WCSP package
  • Innovative input source detection and current optimizer (ICO) with input dynamic power management (DPM)
  • Integrated 7-bit ADC for battery and adaptor monitoring

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Schematic/Block Diagram

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Design Guide

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Design Files

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Parametrics
 PMP15011.1
(Output Voltage 1)
Vin (Min) (V)4.5
Vin (Max) (V)14
Vout (Nom) (V)4.2
Iout (Max) (A)5
Output Power (W)21
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ25890  1-cell, 5-A, battery charger Maxchargeâ„¢ tech for high input voltageand adjustable boost with D+/D-  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
BQ25898C  I2C controlled single cell 3-A charger for High input voltagewith DSBGA Package  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ25890 Download Download

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Technical documentation

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Datasheet (1)
Title Type Size (KB) Date
PDF 1928 04 May 2018
User guides (1)
Title Type Size (KB) Date
PDF 4925 03 Nov 2016
Design files (6)
Title Type Size (KB) Date
ZIP 624 21 Nov 2016
ZIP 1184 21 Nov 2016
PDF 1919 21 Nov 2016
PDF 489 21 Nov 2016
PDF 68 21 Nov 2016
PDF 640 21 Nov 2016
Related Tools & Software

Reference Designs (1)

Name Part Number Tool Type
Dual Battery Charger IC Reference Design (connected in Cascode Configuration)  TIDA-00590  Reference design 

Software development (1)

Name Part Number Software Type
Battery Management Studio (bqStudio) Software  BQSTUDIO  Application software & frameworks 


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