3 Description. 0.5% Charge Voltage Accuracy. The bq24620 device is a highly integrated lithium. 3% Charge Current Accuracy phosphate switched- mode battery charge controller. Integration. The device offers a constant- frequency synchronous. Internal Loop Compensation switching PWM controller with Apr 30, 2002 Single Chip USB to Asynchronous Serial. Data Transfer. Full Handshaking & Modem Interface. Signals. UART I/F Supports 7 / 8 Bit Data, 1 / 2. Stop Bits and Odd/Even/Mark/Space/No. Parity. Data rate 300 => 3M Baud (TTL). Data rate 300 => 1M Baud (RS232). Data rate 300 => 3M Baud. (RS422/RS485). bq24760 . 28V, 1-4 Cells. Turbo Boost. DPM, 750kHz. N-FETs Selector. 3.5x3. 5mm QFN-20 bq24735. 28V, 2-4 Cells. NVDC-1, 800kHz. N-FET Power Path. 3.5 x3.5mm QFN-20 bq24715. 28V, 1-4 Cells. NVDC-1. N-FET Power Path. 4.0x4. 0mm QFN-28 bq24770/3. TI Multi-Cell Switch-Mode Charger Portfolio. 1-3S w/ FETS.