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


Design files


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.  

  • 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
Output voltage options PMP15011.1
Vin (Min) (V) 4.5
Vin (Max) (V) 14
Vout (Nom) (V) 4.2
Iout (Max) (A) 5
Output Power (W) 21
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC92.PDF (4995 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDROS8.ZIP (1184 K)

Files used for 3D models or 2D drawings of IC components


Design file that contains information on physical board layer of design PCB

TIDROS7.PDF (1919 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
* Test report Cascade Dual Charger Reference Design for 1S Li-Ion Battery-Powered Equipment Nov. 03, 2016

Related design resources

Software development

BQSTUDIO Battery Management Studio (bqStudio) Software

Reference designs

TIDA-00590 Dual Battery Charger IC Reference Design (connected in Cascode Configuration)

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