MAX745EAP+ by Analog Devices

Switch-Mode Lithium-Ion Battery-Charger


The MAX745 provides all functions necessary for charging lithium-ion (Li+) battery packs. It provides a regulated charging current of up to 4A without getting hot, and a regulated voltage with only ±0.75% total error at the battery terminals. It uses low-cost, 1% resistors to set the output voltage, and a low-cost N-channel MOSFET as the power switch. The MAX745 regulates the voltage set point and charging current using two loops that work together to transition smoothly between voltage and current regulation. The per-cell battery voltage regulation limit is set between 4V and 4.4V using standard 1% resistors, and then the number of cells is set from 1 to 4 by pin-strapping. Total output voltage error is less than ±0.75%. For a similar device with an SMBus™ microcontroller interface and the ability to charge NiCd and NiMH cells, refer to the MAX1647 and MAX1648. For a low-cost Li+ charger using a linear-regulator control scheme, refer to the MAX846A.

Where to Buy

Prices starting from US$5.18

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Farnell
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Transfer Multisort Elektronik
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Features

Charges 1 to 4 Li+ Battery Cells
±0.75% Voltage-Regulation Accuracy Using 1% Resistors
Provides up to 4A without Excessive Heating
90% Efficient
Uses Low-Cost Set Resistors and N-Channel Switch
Up to 24V Input
Up to 18V Maximum Battery Voltage
300kHz Pulse-Width Modulated (PWM) Operation Low-Noise, Small Components
Low-Noise, Small Components
Stand-Alone Operation—No Microcontroller Needed

Specifications

Charging VIN (V) (max) 24
Max. ICHG (A) 4
Cell Chemistry Li-IonLi-Polymer
# Lithium Ion Cells 1234
Protected VIN (V) (max) 24
Charger (V) 18
Oper. Temp. (°C) -40 to +85
Package/Pins SSOP/20
BudgetaryPrice (See Notes) 5.63


MAX745EAP+ Power Management ICs - PMIC by Analog Devices

BATTERY-CHARGER SWITCH-MODE SMD

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Battery Type Li-Ion
Input Voltage 24V
Battery Charge Voltage 12V
Charge Current Max 4A
Battery IC Case Style SSOP
No. of Pins 20Pins
No. of Series Cells 4
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 745
Clock Frequency 300kHz
Operating Temperature Range -40°C to +85°C
Supply Current 4mA
Supply Voltage Min 6V
Supply Voltage Range 6V to 24V
Termination Type Surface Mount Device
Voltage Vcc Min 6V

Alternative Descriptions

Switch-Mode Lithium-Ion Batter | Analog Devices
Battery-Charger, Switch-Mode, Smd | Newark Electronics
BATTERY-CHARGER, SWITCH-MODE, SMD | element14
CHARGEUR DE BATTERIE SMPS LI-ION | RS
IC: PMIC | Transfer Multisort Elektronik

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX745EAP+ ?

Additional datasheets, footprints and schematics for MAX745EAP+ are listed on our Part Details page. You can also find images and similar parts to MAX745EAP+ on this page.

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Is the MAX745EAP+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX745EAP+ have stock available?

Authorised distributors including Analog Devices, Newark Electronics, element14, Farnell and RS have stock available or on a lead time for MAX745EAP+ .

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