描述 Description

The RT9756A is a high-efficiency and high charge current charger. The efficiency is up to 98.2% when VBAT = 4V, IBAT = 2A with a maximum charge current of up to 8A in DIV2 mode. In bypass mode, the efficiency is up to 99.1% when VBAT = 4V and IBAT = 1A, with a maximum charger current of up to 5A. The device integrates smart cap divider topology, direct charging mode, external overvoltage protection control, an input reverse blocking N-MOSFET and 2-way regulation, a dual-phase charge pump core, 14-way protection, 9-way system alarm, 8-channel high-speed analog-to-digital converter and USB BC 1.2 detection. The high-speed analog-to-digital converter provides input and output voltage, current, and temperature information to the host, which can be monitored via the I2C serial interface. The recommended junction temperature range is -40°C to 125°C, and the ambient temperature range is -40°C to 85°C.

特性 Features

Integrate Cap Divider Mode (DIV2 Mode) and Direct Charging Mode (Bypass Mode)
Support USB BC1.2
External OVP MOS Control and Regulation - High Absolute Maximum Rating of 37V - 100ns Fast Reaction Time and 100ns Fast Turn-Off Time - VBAT Voltage Regulation (VBAT REG) - IBAT Current Regulation (IBAT REG)
Dual-Phase Charge Pump Core - 8A Output Current Capability - Efficiency up to 98.2% when VBAT = 4V, IBAT = 2A (DIV2 Mode) - Efficiency Up to 99.1% when VBAT = 4V, IBAT = 1A (Bypass Mode) - 100kHz to 1000kHz Variable Switching Frequency Stay Out of Audio Band - Spread Spectrum Technology for EMI Reduction
8-Channel 12-bit ADC - High Speed Data Rate for 128 Times Average Per Channel - 8-Channel (VBUS, IBUS, VOUT, VBAT, IBAT, TDIE, DP, DM) for Voltage/Current/Temperature Measurement
Input Reverse Blocking N-MOSFET - Block the Reverse Current
3-Error Charge Pump Switch Protection
11-Way System Protection
9-Way System Alarm

應(yīng)用 Application

?Smart Phones
? Tablets