RT9490 Buck-Boost Switching Battery Charger
Richtek’s 5 A buck-boost switching battery charger is ideal for applications such as tablets and smart phones
Richtek's RT9490 is a highly-integrated 5 A buck-boost switch mode battery charge management and system power path management device for 1-4 cell Lithium Ion and Lithium polymer battery. The low-impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, and extends battery life during discharging phase. The I²C serial interface with charging and system settings makes the device a truly flexible solution.
Features
- Supports dual input selection
- Supports BC1.2, host mode, and FRS/seamless
- Supports 11-channel, 16-bit ADC
- Supports USB on-the-go (OTG)
- 93.8% OTG efficiency at 2 A with 8.4 V battery and 5 V output
- Output voltage with 10 mV resolution to support USB-PD
- BAT current limit regulation (BCLR)
- High-efficiency, 750 kHz/1 MHz/1.5 MHz programmable frequencies, synchronous switch-mode buck-boost charger
- 96.7% charge efficiency at 2 A with 9 V input and 8 V battery
- Input voltage range: 3.6 V to 24 V
- Average input current regulation (AICR)
- Minimum input voltage regulation (MIVR)
- Low battery quiescent current
- High accuracy for charger CV and ICHG
- Protections
- Overtemperature protection (OTP)
- Junction thermal regulation (JTR)
- Input protection (VAC OVP/VBUS OVP/OCP)
- Battery overvoltage protection (VBAT OVP)
- System voltage protection (VSYS OVP/UVP)
- System overload protection (VSYS OLP)
- Cycle-by-cycle overcurrent protection (OCP)
- OTG low battery protection (OTG LBP)
- OTG voltage protection (OTG OVP/UVP)
Applications
- Smart phones
- Tablets
- Chromebooks
- Drones
- Portable devices and accessories
RT9490 Switching Battery Charger Diagram - Click to Enlarge
Published: 2023-08-23
