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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.

Applications

  • Smart Phones
  • Tablets
Key Spec.
RT9756A
Status Active
Vin (min) (V) 2.8
Vin (max) (V) 17
Battery Charge Voltage (max) (V) 5
Battery Charge Current (max) (A) 8
Status Indicator Yes
Charger Type Switching
Input Source USB
Features Adjustable Frequency;I2C;OCP;OVP;SCP;Stable with Ceramic Capacitor;UVP
Package Type WL-CSP2.8x2.8-36(BSC)
Built-in Power MOSFETs Yes
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
Design Tool
Title Type Last UpdateDownload
RT9756A GUI_V3ZIP2024/05/13
Please confirm with our distributor or sales representative for actual stock status.
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