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10 A 2:1 Switched Capacitor Charger for Single Cell Battery
The PCA9481A is a highly-integrated switched-capacitor converter with an embedded OVPFET and external FET control, targeted to provide two times the output current for fast charging applications with a 1-cell battery. The device works in 2:1 switching operation with very high efficiency (>97%, at VVOUT = 4V, IVOUT = 8A), in 1:2 switching operation, or in 1:1 mode with forward and reverse direction.
The chip is offered in 4.16mm x 2.96mm x 0.525mm, 7 x 10bumps, 0.4mm pitch WLCSP package.
PCA9481A Top View
Product Details
Features
Key Features
- Dual phase switched capacitor for single cell battery
- Li-ion battery, Li-polymer battery charger
- Multiple operation mode : 2:1, 1:2, forward and reverse 1:1
- 5 V to 10.2 V input voltage
- 2.8 V, 5 V output voltage
- Max. 10 A output current
- Integrate OVP FET for protection and regulation
- Single battery cell
Performance
- >97% efficiency at 8 A
Protections
- Over-voltage protection
- Under-voltage protection
- Thermal shutdown
- Short protection at OVP_OUT and flying capacitor during start-up
- Watchdog timer
Others
- Leader and follower for parallel charging
- 9 channels 12-bit ADC
- 1Mbit/s I²C-bus target interface
Buy/Parametrics
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2 documents
Compact List
Application Note (1)
Data Sheet (1)
Design Resources
