ACT2803

5V/2.4A Dual Cell Single Port Backup Battery Power Manager

ACT2803 Datasheet Image
ACT2803 Evaluation Kit Appilcation Note Image

Ordering Info

PART NUMBER

OUTPUT

CHARGE CURRENT

BATTERY CHARGE
TERMINATION VOLTAGE

CELL
BALANCING

TH PIN

PACKAGE

ACT2803QJ-T

5V/2.4A

1.8A

4.2V

Yes

Yes

QFN55-40

ACT2803QJ-T0435

5V/2.4A

1.8A

4.35V

Yes

Yes

QFN55-40

ACT2803 from ACT28xx Family of high-performance, low-profile ICs enables Industry's smallest size solutions for backup battery pack and standalone battery chargers. Each solution can be implemented without out the need for additional ICs other than a single ACT28xx.

ACT28xx Family integrates all the functions that a backup battery pack needs, including switching charger, cell balancing, boost converter and LED indication. ACT28xx Family also includes an input to obtain user feedback (for example, via a push button), to support various user-interface functions such as turn on/off charging and query charging status. The IC supports LED indication to display charging level on 4 LEDs.

ACT2803 operates at 400kHz for switching charger and 400kHz for boost converter allowing tiny external inductor and capacitors. ACT2803 provides a direct power path from input to output with programmable current limit while providing power to switching charger. Output has higher priority than battery charger if the programmed input current limit is reached.

ACT28xx Family charges battery with full cycle of preconditioning, fast charge with constant current and constant voltage until end of charge. The battery charger is thermally regulated at 110°C with charge current foldback. ACT28xx Family boost converter steps battery voltage upto 5V. Boost converter features high efficiency, constant current regulation, short circuit protection and over voltage protection.

Key Features & Benefits

  • Dedicated single chip solution for mobile power with minimal component count
  • Dual cell battery charger with Cell Balancing Management
  • 2.4A output with Constant Current (CC) regulation
  • USB Auto Detection supports USB BC1.2, Apple and Samsung Devices, and Chinese YD/T 1591-2009
  • 5.07V +/-1% Output with prioritized Power Path from input to output
  • 4.2V / 4.35V +/-0.5% battery charge voltage accuracy
  • I2C Interface for optimal system performance and status reporting
  • Output plug-in detection and Wakeup from sleep mode
  • 10mA No Load Detection and Shut-off
  • 4 LED battery level indication
  • 4 modes of fuel gauge LED indication
  • <10uA low battery drain current
  • >92% Charge and discharge efficiency at 3.4A output for full battery range
  • Sophisticated Battery Protection for Over Current (OCP), Over Voltage (OVP), Over Temperature (OTP) and Short Circuit Protections (SCP). Battery Disconnection at Output Short

System Block Diagram


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Typical System Schematic


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System Operation in Constant Current Mode

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Evaluation Kit

The high-level of integration included in ACT28xx ICs enable Industry's smallest design of battery chargers and mobile chargers such as Power Bank. The smaller PCB size and smaller component size enables smaller PCB design and associated costs. On the other hand, the smaller PCB can also enable the use of larger battery pack to store more energy within the power bank product.

The application note includes the User Guide, schematics, layout drawings, and Bill Of Materials (BOM).

ACT2803 Evaluation Board Application Note Image

Supported Applications


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