GRM21BR61E226ME44
Murata
CFLY1 22μF/25V 2.0 x 1.25 x 1.25 or 1.6 x 0.8 x 0.8 GRM21BR61E226ME44 or GRM188C61E226ME01 Place three or four capacitors.
Application NoteNxp
AN14057: 4:1 Switched Capacitor Charger Application Note
Application note for the NXP PCA9485UK, a 4:1 switched-capacitor charger for 1-cell battery fast charging up to 65W with 97% efficiency and I2C control.
Overview
This application note provides design guidance for the PCA9485UK, a highly integrated switched-capacitor converter designed for 1-cell battery fast charging. The device supports multiple operation modes including 4:1, 2:1, 1:2, 1:4, and 1:1 forward and reverse switching. It features an integrated OVPFET, dual external FET controls, and achieves up to 97% efficiency. The document includes a reference schematic for 65W charging, mode transition guidelines to prevent reverse current, a detailed bill of materials featuring GaN and CMOS FET options, and comprehensive PCB layout recommendations for thermal and electrical performance optimization.
Use Cases
- Smartphone fast charging systems
- USB Power Delivery (PD) mobile applications
- 1-cell battery management
- Wireless power receiver charging
- Handheld device power architectures
Topics
switched capacitor charger
PCA9485UK
fast charging
4:1 converter
power management
OVPFET
65W charging
1-cell battery
I2C interface
efficiency
Referenced Parts
INN040W048AQ1
Innoscience
GaN FET INN040W048AQ1
GRM033D70J105ME01
Murata
CAVDD 1μF/6.3V 0.6 x 0.3 x 0.3 GRM033D70J105ME01 Place one capacitor.
GRM033R61C104KE14
Murata
CBST 100nF/16V 0.6 x 0.3 x 0.3 GRM033R61C104KE14 Place one capacitor
GRM033R71H102KA12
Murata
CVIN_IN 1nF/35V 0.6 x 0.3 x 0.33 GRM033R71H102KA12 For high frequency filter
GRM155C71A105ME11
Murata
CHVDD 1μF/10V 0.6 x 0.3 x 0.3 GRM155C71A105ME11 Place one capacitor.
GRM188C61E226ME01
Murata
CFLY1 22μF/25V 2.0 x 1.25 x 1.25 or 1.6 x 0.8 x 0.8 GRM21BR61E226ME44 or GRM188C61E226ME01 Place three or four capacitors.
PCA9485UK
NXP Semiconductors
PCA9485UK is a highly integrated switched-capacitor charger with an embedded OVPFET
CL10A106ML8NRN
Samsung Electro-Mechanics
COVP_OUT 10μF/35V 1.6 x 0.8 x 0.8 CL10A106ML8NRN
CL10A226MO7FZN
Samsung Electro-Mechanics
CFLY2 22μF/16V 1.6 x 0.8 x 0.7 CL10A226MO7FZN Place three capacitors.
CL10A226MP8NUN
Samsung Electro-Mechanics
CFLY3 22μF/10V 1.6 x 0.8 x 0.8 CL10A226MP8NUN Place three capacitors.
CL10A226MP8NUNE
Samsung Electro-Mechanics
CVOUT 22μF/10V 1.6 x 0.8 x 0.8 CL10A226MP8NUNE Place two capacitors.
CL10A475KL8NRN
Samsung Electro-Mechanics
CVIN 4.7μF/35V 1.6 x 0.8 x 0.8 CL10A475KL8NRN
NVLJWS6D0N04CL
onsemi
CMOS FET NVLJWS6D0N04CL
| GRM21BR61E226ME44 | Murata | CFLY1 22μF/25V 2.0 x 1.25 x 1.25 or 1.6 x 0.8 x 0.8 GRM21BR61E226ME44 or GRM188C61E226ME01 Place three or four capacitors. |
| INN040W048AQ1 | Innoscience | GaN FET INN040W048AQ1 |
| GRM033D70J105ME01 | Murata | CAVDD 1μF/6.3V 0.6 x 0.3 x 0.3 GRM033D70J105ME01 Place one capacitor. |
| GRM033R61C104KE14 | Murata | CBST 100nF/16V 0.6 x 0.3 x 0.3 GRM033R61C104KE14 Place one capacitor |
| GRM033R71H102KA12 | Murata | CVIN_IN 1nF/35V 0.6 x 0.3 x 0.33 GRM033R71H102KA12 For high frequency filter |
| GRM155C71A105ME11 | Murata | CHVDD 1μF/10V 0.6 x 0.3 x 0.3 GRM155C71A105ME11 Place one capacitor. |
| GRM188C61E226ME01 | Murata | CFLY1 22μF/25V 2.0 x 1.25 x 1.25 or 1.6 x 0.8 x 0.8 GRM21BR61E226ME44 or GRM188C61E226ME01 Place three or four capacitors. |
| PCA9485UK | NXP Semiconductors | PCA9485UK is a highly integrated switched-capacitor charger with an embedded OVPFET |
| CL10A106ML8NRN | Samsung Electro-Mechanics | COVP_OUT 10μF/35V 1.6 x 0.8 x 0.8 CL10A106ML8NRN |
| CL10A226MO7FZN | Samsung Electro-Mechanics | CFLY2 22μF/16V 1.6 x 0.8 x 0.7 CL10A226MO7FZN Place three capacitors. |
| CL10A226MP8NUN | Samsung Electro-Mechanics | CFLY3 22μF/10V 1.6 x 0.8 x 0.8 CL10A226MP8NUN Place three capacitors. |
| CL10A226MP8NUNE | Samsung Electro-Mechanics | CVOUT 22μF/10V 1.6 x 0.8 x 0.8 CL10A226MP8NUNE Place two capacitors. |
| CL10A475KL8NRN | Samsung Electro-Mechanics | CVIN 4.7μF/35V 1.6 x 0.8 x 0.8 CL10A475KL8NRN |
| NVLJWS6D0N04CL | onsemi | CMOS FET NVLJWS6D0N04CL |