MP26124

–24V INPUT, 2A, 600kHz, 4S SWITCHING LI-ION BATTERY CHARGER

MP26124 Rev. 1.0

www.MonolithicPower.com

11

10/10/2017

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BLOCK DIAGRAM

Charge Control

Logic

Timer

PRE_REGS

600kHz

OSC

VREF

LDO

Regulator

Drive

A1

Current Sense

CTRL

Charge

Current Sense

PWM

Comparator

Current Limit

Comparator

S

R

R

Q

BST

SW

CSP

A2

BATT

0.12V

or 1.2V

GMI

GMV

3 bit trim

5 bit trim

EN

VREF33

NTC

FB

VBATT

CTRL

TMR

0.12V

ACOK

CHGOK

FB

FB

GND

VIN

COMPI

COMPV

Max Trickle Time

Max Charge Time

Max Reflesh Time

ACOK

1.2V

4V

2.8V

VIN

BATT+300mV

TC/CC

Charge Comparator

Recharge Comparator

BF

Comparator

M1

COMP

x6

Charge

Current Sense

IREF

RS1

L

4 cells

battery

SGND

Mini Refresh

VCC

Figure 1: Functional Block Diagram