TI Texas instruments BQ24296M

BQ24296M

Narrow VDC power path management I2C control 3A single section USB charger

describe

TI Texas instruments agent: jia haosheng electronics

Bq24296M is TI Texas instruments' highly integrated switch mode battery charging management and system power path management device, which is used for battery life of single lithium ion and lithium polymer batteries in various smartphone and tablet applications. Its low impedance power supply path optimizes the operating efficiency of the switching mode, reduces the battery charging time and prolongs the battery life in the discharge stage. The I2C serial interface with charging and system setup makes this device a truly flexible solution.

TI Texas instruments supports 3.9v-6.2v USB input power, including a standard USB host port with 6.4v overvoltage protection and a USB charging port. The device supports USB 2.0 and USB 3.0 power specifications, with input current and voltage regulation functions. In order to set the default input current limit, bq24296M obtains the results from the system detection circuit (such as USB PHY device). TI Texas instruments bq24296M this device also has fast start-up function and accurate current limiting capacity up to 1.5a, which can provide 4.55v-5.5v (default 5V) adjustable voltage for VBUS and support USB on-the-go operation.

Power path management adjusts the system voltage to slightly higher than the battery voltage, but does not drop below the minimum system voltage of 3.5v (programmable). This feature keeps the system running even when the battery is completely depleted or removed. When the input source current or voltage limit is reached, the power supply path management automatically reduces the charging current to zero, and then begins to discharge the battery until the power demand of the system is satisfied. This charging mode ensures that the input source is not overloaded.

TI Texas instruments bq24296M this device starts and completes a charging cycle when the host control is unavailable. TI Texas instruments automatically charges the battery in three stages: pre-regulation, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charging current falls below the preset limit in the constant voltage phase. After that, when the battery voltage drops below the recharging threshold, the charger will automatically start another charging cycle.

TI Texas instruments bq24296M this charging device provides a variety of safety features for battery charging and system operation, including negative temperature coefficient thermistor monitoring, charging safety timer and overvoltage/overcurrent protection. When junction temperature over 120 ° C (set), thermal regulation to reduce charging current.

STAT output reports charging status and any failure conditions. INT immediately notifies the host when a failure occurs.

TI Texas instruments bq24296M USES 24 pin 4x4mm2 ultra-thin VQFN package.

features

Bq24296M: 90% efficient switching mode 3A charger

3.9v to 6.2v single input USB standard charger, providing 6.4v overvoltage protection

Input voltage and current limits support USB 2.0 and USB 3.0

Input current limits: 100mA, 150mA, 500mA, 900mA, 1A, 1.5a, 2A and 3A

Bq24296M: adjustable output voltage range from 4.55v to 5.5v when USB OTG 1A or 1.5a

Quick OTG startup (typical value 22ms)

The efficiency of 5V booster mode is 90%

Accurate plus or minus 15% intermittent mode overcurrent protection

Bq24296M: narrow range VDC (NVDC) power supply path management

Immediate system startup in the absence of battery or deep battery discharge

Ideal diode operation in battery charging mode

Bq24296M: 1.2mm thin inductance 1.5mhz switching frequency

The I2C port is used to achieve optimal system performance and status reporting

Bq24296M: independent battery charging with or without host management

The battery is charged to enable energy

Battery charging pre-adjustment

Charge termination and recharging

Bq24296M: high precision

Charging voltage adjustment range is plus or minus 0.5%

Charging current adjustment range is plus or minus 7%

Input current adjustment range is plus or minus 7.5%

USB OTG booster mode plus or minus 3% output voltage adjustment range

Bq24296M: high integration

Power path management

Synchronous switching MOSFET

Integrated electrical influenza test

Cathode loaded diode

Internal loop compensation

Bq24296M: security

Temperature sensing of battery for charging and discharging in OTG mode

Battery charging safety timer

Heat regulation and heat off

Input and system overvoltage protection

MOSFET overcurrent protection

Bq24296M: charging state output for LED or host processor

Bq24296M: the maximum power tracking function is realized through input voltage stabilization

20 A low battery leakage current, supporting transport mode

4mm x 4mm compact ultra-thin square flat lead-free (VQFN)-24 package

application

Tablets, smartphones, networking devices

Portable audio speaker