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Overview
| Topology | Buck-Boost Converter |
| Input voltage | 4-29 V |
| Switching frequency | 125-1000 kHz |
Description
The ACT2861 is a buck-boost charger with 4 integrated MOSFETs. It offers a high efficiency, low component count, compact solution for 2 to 5 cell battery charging application. It operates from an input voltage range from 4 to 29V. An advanced switch control algorithm allows the buck-boost converter to maintain output voltage regulation with input voltages that are above, below or equal to the output voltage. The ACT2861 is optimized to reduce input current in shipping, shutdown, and standby for applications which are sensitive to quiescent current draw, such as battery-powered devices. The system can be monitored and configured by I²C. The built-in ADC can be read for the information of input/output voltages and currents, and the die temperature. With an MCU, it can easily be configured to charge a multi cell battery pack from a variety of input power sources.
Features
- Wide VIN Range: 3.9V to 29V (No Dead Zone)
- Supports 2 to 5 Cell Lithium-ion Batteries
- Supports OTG Function (5V ~ 22.5V Input) with wide range of output voltages
- OTG output supports QC3.0 / USB PD + PPS output levels and transition times
- Programmable Frequency: 125KHz, 250KHz, 500kHz, and 1MHz
- 2V ~ 5V/100mA Programmable Output LDO
- Precision 0.5% Voltage Reference
- +/-4% Output Constant Current Regulation
- < 5 μA Leakage Current from Battery in Shipping Mode
- Programmable Charge Voltage via I2C
- Programmable Charge Current via Pin and I2C
- Programmable Soft-Start
- Programmable Safety Timer
- Battery Path Impedance Compensation
- JEITA Compliant
- Cycle-by-Cycle Current Limit
- Built in ADC for Temperature, Input and Output Voltage and Current monitoring
- Thermal Regulation and Protection
- 25mΩ FET from VIN to SW1
- 25mΩ FET from SW2 to VOUT
- 35mΩ FET from SW1 to PGND
- 35mΩ FET from SW2 to PGND
- Low Output Ripple
- Thermally Enhanced 32-Lead 4mx4mm QFN
Typical applications
- Solar Powered Devices
- Multi Cell Battery Charger / Power Bank
- Car Charger / 24V Industrial Applications / Multiple Power Source Supplies /DC UPS
- Automotive Power Systems
- Portable Battery-Powered Devices
- Solid-State Lighting
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | Pins | PCB/Cable/Panel | Modularity | Type | Wire Section | λDom typ.(nm) | Emitting Color | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chip Technology | 2θ50% typ.(°) | C | Tol. C | VR(V (DC)) | Size | Operating Temperature | DF(%) | RISO | Ceramic Type | L(mm) | W(mm) | Fl(mm) | Packaging | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Mount | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | Pitch(mm) | Ø D(mm) | IR(A) | Working Voltage(V (AC)) | Color | Gender | H(mm) | Operation Force(g) | Electrical Life(Cycles) | Actuator Color | Washable | Vaporphase process | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WR-PHD Jumper, 1, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Jumper | Pins1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +125 °C | – | Insulation Resistance1000 MΩ | – | Length2.44 mm | – | – | PackagingBag | – | – | – | – | – | – | – | – | – | – | Pitch2.54 mm | – | Rated Current3 A | Working Voltage250 V (AC) | ColorBlack | GenderJumper | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, 1, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins1 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length2.54 mm | – | – | PackagingBag | – | – | – | – | – | – | MountTHT | – | – | – | Pitch2.54 mm | – | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
 | WR-TBL Series 2141S - 3.50 mm Horizontal Entry Modular w. Rising Cage Clamp, 2, Rising Cage Clamp | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Pins2 | PCB/Cable/PanelPCB | ModularityYes | TypeHorizontal | Wire Section 30 to 16 (AWG) 0.05 to 1.31 (mm²) | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -30 °C up to +120 °C | – | – | – | Length7 mm | – | – | PackagingBox | – | – | – | – | – | – | MountTHT | – | – | – | Pitch3.5 mm | – | Rated Current10 A | Working Voltage130 V (AC) | – | – | – | – | – | – | – | – | ||||
 | WR-PHD Pin Header - Single, 2, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins2 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length5.08 mm | – | – | PackagingBag | – | – | – | – | – | – | MountTHT | – | – | – | Pitch2.54 mm | – | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
 | WR-PHD Pin Header - Single, 3, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWR-PHD Pin Header - Single | Pins3 | – | – | TypeStraight | – | – | – | – | – | – | – | – | – | – | – | – | Operating Temperature -40 °C up to +105 °C | – | Insulation Resistance1000 MΩ | – | Length7.62 mm | – | – | PackagingBag | – | – | – | – | – | – | MountTHT | – | – | – | Pitch2.54 mm | – | Rated Current3 A | Working Voltage250 V (AC) | – | GenderPin Header | – | – | – | – | – | – | |||
 | WL-SMCW SMT Mono-color Chip LED Waterclear, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWL-SMCW SMT Mono-color Chip LED Waterclear | – | – | – | – | – | Dominant Wavelength [typ.]570 nm | Emitting ColorBright Green | Peak Wavelength [typ.]572 nm | Luminous Intensity [typ.]40 mcd | Forward Voltage [typ.]2 V | Chip TechnologyAlInGaP | Viewing Angle Phi 0° [typ.]140 ° | – | – | – | Size0603 | Operating Temperature -40 °C up to +85 °C | – | – | – | Length1.6 mm | Width0.8 mm | – | PackagingTape and Reel | – | – | – | – | – | – | MountSMT | – | – | – | – | – | – | – | – | – | Height0.7 mm | – | – | – | – | – | ||||
 | WCAP-ATG8 Aluminum Electrolytic Capacitors, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-ATG8 Aluminum Electrolytic Capacitors | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance470 µF | Capacitance±20% | Rated Voltage50 V (DC) | – | – | Dissipation Factor10 % | – | – | Length20 mm | – | – | PackagingAmmopack | – | – | – | – | – | – | – | Endurance 2000 | Ripple Current828 mA | Leakage Current235 µA | Pitch5 mm | Diameter10 mm | – | – | – | – | – | – | – | – | – | – | ||||
| WCAP-CSGP MLCCs 10 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance100 nF | Capacitance±10% | Rated Voltage10 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor5 % | Insulation Resistance5 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 10 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance1 µF | Capacitance±10% | Rated Voltage10 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance0.1 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 25 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 25 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance470 nF | Capacitance±10% | Rated Voltage25 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor10 % | Insulation Resistance1.1 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 50 V(DC), –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWCAP-CSGP MLCCs 50 V(DC) | – | – | – | – | – | – | – | – | – | – | – | – | Capacitance47 nF | Capacitance±10% | Rated Voltage50 V (DC) | Size0603 | Operating Temperature -55 °C up to +125 °C | Dissipation Factor3 % | Insulation Resistance10 GΩ | Ceramic TypeX7R Class II | Length1.6 mm | Width0.8 mm | Pad Dimension0.4 mm | Packaging7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Height0.8 mm | – | – | – | – | – | |||||
 | WS-TASV SMT Washable Tact Switch 6x6 mm, –, – | Simulation– | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWS-TASV SMT Washable Tact Switch 6x6 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Rated Voltage12 V (DC) | – | Operating Temperature -40 °C up to +85 °C | – | Insulation Resistance100 MΩ | – | – | – | – | PackagingTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | Rated Current0.05 A | – | – | – | Height3.5 mm | Operation Force160 g | Electrical Life1000000 Cycles | Actuator ColorBlack | WashableYes | Vaporphase processnot specified | |||
 | WE-LHMI SMT Power Inductor, –, – | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-LHMI SMT Power Inductor | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Size1365 | Operating Temperature -40 °C up to +125 °C | – | – | – | Length13.65 mm | Width12.5 mm | – | – | Inductance22 µH | Performance Rated Current6.5 A | Saturation Current @ 10%6.7 A | Saturation Current @ 30%13.9 A | DC Resistance37 mΩ | Self Resonant Frequency5.4 MHz | MountSMT | – | – | – | – | – | – | – | – | – | Height6.2 mm | – | – | – | – | – |