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RT9756A

8A Single Cell Smart Cap Divider and Direct Charge Charger with 8-Channel ADC, USB BC 1.2 Detection

RT9756A
New

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.

应用

  • Smart Phones
  • Tablets

主要规格

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

关键特性

  • 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

Application Notes

Datasheet

DS9756A-02.pdf

Datasheet

DS9756A-02.pdf

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