MP26124

24V Input, 2A, 600kHz,

4S Cell Switching Li-Ion Battery Charger

MP26124 Rev. 1.0

www.MonolithicPower.com

1

10/10/2017

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

© 2017 MPS. All Rights Reserved.

DESCRIPTION

The MP26124 is a monolithic, DC/DC, step-

down, switching charger for 4-series cell Li-ion

battery packs. The MP26124 has an integrated

high-side power MOSFET that can output a

charge current up to 2A and also has peak-

current-mode control for fast loop response and

easy compensation.

The MP26124 uses a sense resistor to control a

programmable charge current and regulates the

charge current and charge voltage accurately

using two control loops.

The MP26124 has multiple fault condition

protections

including

cycle-by-cycle

current

limiting and thermal shutdown. Other safety

features include battery temperature monitoring

and protection, charge status indication, and a

programmable timer to stop the charging cycle

when the timer expires.

The MP26124 requires a minimal number of

readily available external components and is

available in a QFN-16 (4mmx4mm) package.

FEATURES

 Charge 4S Cell Li-Ion Battery Packs

 Up to 24V Operation Voltage

 Programmable Charging Current up to 2A

 ±0.75% V

 0.2Ω Integrated Power MOSFET

 Up to 90% Efficiency

 Fixed 600kHz Frequency

 Preconditioning for Fully Depleted Batteries

 Charging Status Indicator

 Input Supply Fault Indicator

 Thermal Shutdown

 Cycle-by-Cycle Over-Current Protection

(OCP)

 Battery Temperature Monitor and Protection

 Available in a QFN-16 (4mmx4mm)

Package

APPLICATIONS

 Clean Robots

 Drones

 Chargers for 4S Cell Li-Ion Batteries

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For

MPS green status, please visit the MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are registered trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

L

RS1

VIN

VREF33

VCC

SGND

CHGOK

ACOK

NTC

EN

COMPV

COMPI

GND

TMR

BATT

CSP

BST

SW

OFF

ON

C2

10μF

C3

1μF

C4

2.2nF

C5

4.7nF

C6

0.1μF

C7

0.1μF

R1 R2

R3

10k

Ω

10kΩ

R42.5kΩ

R5

750

Ω

10μH

200m

Ω

D1

C1

4.7μF

4S

Battery

D2

18V to 24V

MP26124