Analog Devices (MAX1873SEEE+) Battery Charger for 4 Cells of Li-Ion battery

Battery Charger for 4 Cells of Li-Ion battery, 28V input, 4A charge, QSOP-16

Product Overview
The MAX1873SEEE+ is a simple current-limited switch mode Li+ charger controller in 16 pin QSOP package. It provides a regulated charging current and voltage with less than ±0.75% total voltage error at the battery terminals. An external P channel MOSFET operates in a step down DC-DC configuration to efficiently charge batteries in low cost designs. The MAX1873 device regulates the battery voltage and charging current using two control loops that work together to transition smoothly between voltage and current regulation. An additional control loop limits current drawn from the input source so that AC adapter size and cost can be minimized. An analogue voltage output proportional to charging current is also supplied so that an ADC or microcontroller can monitor charging current. This device is used as an efficient current limit source to charge NiCd or NiMH batteries in multi-chemistry charger designs.

Charges 3 lithium-ion cells or 7 or 9 Ni battery cells
Operating temperature range from -40°C to 85°C
Input voltage range from 6VDC to 28VDC, charging current is 4A
AC adapter input current limit loop
Analogue output monitors charge current
5µA shutdown battery current
200mV dropout voltage, 100% duty cycle
Adjustable charging current
300KHz PWM oscillator reduces noise

Applications
Power Management, Portable Devices

Product Information
Battery Type: Li-Ion
Input Voltage: 28V
Charge Current Max: 4A
Battery IC Case Style: QSOP
No. of Pins: 16Pins
No. of Series Cells: 4
Operating Temperature Min: -40°C
Operating Temperature Max: 85°C
MSL: MSL 1 – Unlimited

What’s in the box
1 x Battery Charger