MAX17702

PRODUCTION

4.5V to 60V, Synchronous Step-Down Lead-Acid Battery Charger Controller

Data Sheet (Rev. 1)

Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.81

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Part Details

Optimized Feature-Set for Pb-Acid Batteries
- ±4% Charging Current Regulation Accuracy
- ±6% Charging Current Monitor Accuracy (ISMON)
- ±1% Voltage Regulation Accuracy
- Programmable Constant Current (CC) Mode Charging Current (ILIM)
- Full-Battery Detection with Taper Current Threshold and Absorption CV Timer (TMR)
- Wide 4.5V to 60V Input-Voltage Range
- Adjustable Output-Voltage Range from 1.25V up to Four 12V Pb-Acid Batteries in Series
- 125kHz to 2.2MHz Adjustable Frequency with External Clock Synchronization (RT/SYNC)
Reliable Operation in Adverse Environmental Conditions
- Input Short-Circuit Protection (GATEN)
- Deeply Discharged Battery Detection and Preconditioning (DDTH)
- Battery Temperature Sensing and Charge when Within Temperature of Range (TEMP)
- Output Voltage Temperature Compensation
- Cycle-by-Cycle Overcurrent Limit
- Programmable EN/UVLO Threshold
- Status Output Monitoring Using Open-Drain Outputs (FLG1 and FLG2)
- Overtemperature Protection
- Complies with CISPR 32 (EN55032) Class B Conducted and Radiated Emissions
- Wide -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range

Part Models: 2
1ku List Price: Starting From $2.81

Documentation

Data Sheet 1

MAX17702: 4.5V to 60V, Synchronous Step-Down Lead-Acid Battery Charger Controller Data Sheet (Rev.1) 02/04/2022
- Open Interactive Page

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX17702ATG+	24-LFCSP-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys
MAX17702ATG+T	24-LFCSP-4X4X0.75	Material Declaration Reliablity Data	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

SIMPLIS Models 1

MAX17702 SIMPLIS Schematics

Evaluation Kits

Evaluation Kit for the MAX17702 in 13.8V Lead-Acid Battery Charger Application

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Features and Benefits

Operates from a 19V to 60V Input Supply
10A CC Mode Charging Current
13.8V Absorption CV Voltage and 13.5V Floating CV Voltage
350kHz Switching Frequency
Resistor-Programmable UVLO Threshold (EN/UVLO)
Input Short Protection
11V Programmed Deeply Discharged Battery Detection
Capacitor Programmed 17 Hours Absorption CV Timer
Full-Battery Detection with Taper Current Threshold or Absorption CV Timer
Cycle-by-Cycle Overcurrent Limit
External Clock Synchronization (RT/SYNC)
Charger Status Flags (FLG1 and FLG2)
Charging Current Monitoring (ISMON)
Battery Temperature Sensing and Charge when Within Operating Temperature Range of -20°C to +60°C
Charging Voltage Temperature Compensation (-18mV/°C)
IC Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested
Complies with CISPR 32 (EN55032) Class B Conducted and Radiated Emissions

Product Details

The MAX17702EVKITA# (EV kit) provides a proven design to evaluate the MAX17702 high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC lead-acid (Pb-acid) charger controller. The EV kit charges the Pb-acid battery in constant current (CC), absorption constant-voltage (CV) states, and enters an floating CV state after detecting the taper current threshold or absorption CV timer timeout in the absorption CV state. The EV kit is designed to charge the Pb-acid battery with 10A CC mode charging current (_ICHGMAX) and 13.8V absorption CV voltage (V_OUT) from a 19V to 60V input supply. The EV kit is optimized for 24V nominal input-voltage application. The switching frequency of the EV kit is set at 350kHz (f_SW) for optimum efficiency and component size. The EV kit features an absorption CV timer (TMR) to set the maximum charging time in the absorption CV state. The EV kit features battery temperature sensing and charges only when the temperature is in the allowable charging temperature range. The EV kit also features the charging voltage temperature compensation based on battery temperature. The EV kit also provides a good layout example, which is optimized for conducted, radiated EMI and thermal performance. For more details about the IC benefits and features, refer to the MAX17702 IC data sheet.

Applications

Battery Backup for Lighting, Security Cameras, and Control Panels
Building and Home-Automation Backup Power
Industrial Battery Charging and Energy Storage
Portable Industrial Equipment
Power Tools

Resources

MAX17702EVKITA ODB Files - Design Files
1.34M

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