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SC8885A
Synchronous, Bi-directional Buck-Boost Charger Controller with NVDC PowerPath management and SMBus interface
Introduce
 

SC8885A is a synchronous buck-boost charger, which supports buck mode, boost mode and buck-boost mode during forward charging or reverse discharging operation. SC8885A manages 1 to 4 cells battery charging from wide input range from 3.5V to 24V, supporting pre-charge, constant current charge, constant voltage charge. The battery discharging mode supports wide output range from 3V to 20.8V with 8mV resolution. SC8885A is compliant with Intel IMVP8/IMVP9 specification including system power, input current, charging or discharging current monitoring and processor hot indication. SC8885A adopts Narrow-VDC power path management, which automatically regulates the current and voltage and controls the flow of power.Through SMBus interface, user can set the charging/discharging mode easily, and program the charging current, charging voltage, VINREG voltage, input current limit, reserve output voltage adjustment, current limits, switching frequency and other parameters flexibly. Besides, input current limit, charge voltage could be set by external resistors.SC8885A supports pass through mode to reduce switching losses during forward charging. The device also supports Vmin active mode to absorb system peak power when only battery powers the system. 10-bit ADC is integrated to monitor voltage, current and power. SC8885A can operate in learn mode and ship mode to meet the user’s demands. Full protection is supported including input over voltage protection/undervoltage, system and battery over-voltage protection, MOSFETs over-current protection. over-temperature protection.SC8885A is available in a 4mm x 4mm QFN-32 Package.

Function
 

●  Wide input range: 3.5V to 24V, 29V sustainable

 

●  High efficiency Buck-Boost conversion

 

●  Buck-Boost battery charger for 1 to 4 cell batteries

 

●  Charging management including precharge, fast charge, constant voltage charge, auto-wake up

 

●  Reverse discharging mode, output voltage range: 4.48V to 20.8V with 64 mV resolution, comply with USB PD 3.0 standards

 

●  NVDC PowerPath management and dynamic power management

 

●  SMBus interface

 

●  Input current limit set by external resistor and internal register

 

●  Switching frequency: 800kHz /1.2MHz

 

●  Integrated PSYS/IADPT/IBAT pin for power and current monitor, compliant with Intel IMVP8/9 standard

 

●  Integrated processor hot indication(/PROCHOT) pin

 

●  Pass through mode (PTM)

 

●  Integrated VMIN active protection (VAP) to supplement system peak power when only battery exists

 

●  2-Level input current limit for CPU peak power

 

●  Input current optimizer (ICO) algorithm for maximum adapter power capacity

 

●  Learn mode and ship mode for system application

 

●  Integrated 10-bit high accuracy ADC

 

●  Integrated independent comparator for system voltage monitoring

 

●  Protection including UVP, OVP, OCP, SCP, OTP

 

●  QFN 4x4-32 Package

Application
 

●  Ultra-Books, Notebooks, Tablet PCs

 

●  Power Banks

 

●  Industrial Equipment

 

●  Equipment with Rechargeable Batteries

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