{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX8971EWP+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX8971EWP~3T","canonicalUrl":"https://icboms.com/analog-devices/MAX8971EWP~3T","factsUrl":"https://icboms.com/api/mcp/products/MAX8971EWP%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX8971EWP+T single-cell Li-Ion battery charger, 1.55A max charge current, I²C and USB interface, 20-WFBGA WLBGA package, -40°C to 85°C operation, active production.","salesMarkdown":"## 20-WLP package and board-fit The MAX8971EWP+T ships in a 20-WFBGA, WLBGA package with a supplier device package size of 20-WLP (1.62x2.18 mm). This is a fine-pitch wafer-level package — the 20 balls are arrayed on the bottom side with no exposed paddle. The board requires a solder-mask-defined pad per ball, and the 1.62x2.18 mm footprint leaves minimal room for decoupling between the balls; place the 0402 bypass caps on the opposite side of the board, directly under the package via a micro-via-in-pad stack-up. ## 1.55A single-cell Li-Ion charge profile This is a single-cell Li-Ion charger with a battery pack voltage of 4.2 V and a maximum charge current of 1.55 A. The charge current is constant and programmable via the I²C interface — the host sets the current level, and the charger holds it until the cell reaches 4.2 V, then transitions to constant-voltage taper. The 1.55 A ceiling suits a 1500–2000 mAh cell charged at roughly 1C; for a smaller cell, program the current down to avoid exceeding the cell's charge rate. The USB interface allows the charger to negotiate input current limits from a USB host or dedicated charging port. ## Fault protection and temperature range Fault protection covers overvoltage and reverse battery conditions — the charger blocks charging if the input exceeds the safe limit or if the battery is connected backwards.","metaTitle":"MAX8971EWP+T Li-Ion Charger, 1.55A, 20-WLP, Active","metaDescription":"MAX8971EWP+T single-cell Li-Ion charger from Analog Devices. 1.55A max charge current, I²C/USB interface, 20-WLP package. Active production, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Interface":"I²C, USB","Mounting Type":"Surface Mount","Package / Case":"20-WFBGA, WLBGA","Number of Cells":"1","lifecycle_stage":"eol_hot","Fault Protection":"Over Voltage, Reverse Battery","Battery Chemistry":"Lithium Ion","Current - Charging":"Constant - Programmable","Battery Pack Voltage":"4.2V","Charge Current - Max":"1.55A","Operating Temperature":"-40°C ~ 85°C (TA)","Programmable Features":"Current","Voltage - Supply (Max)":"7.5V","Supplier Device Package":"20-WLP (1.62x2.18)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.99","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.99000","currency":"USD"},{"qty":10,"price":"$4.48200","currency":"USD"},{"qty":25,"price":"$4.23720","currency":"USD"},{"qty":100,"price":"$3.67240","currency":"USD"},{"qty":250,"price":"$3.48408","currency":"USD"},{"qty":500,"price":"$3.12624","currency":"USD"},{"qty":1000,"price":"$2.82492","currency":"USD"},{"qty":2500,"price":"$2.07000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6343f676bb66128a88a6de0885221a21.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What interface does MAX8971EWP+T use to control charging?","answer":"The charger uses an I²C interface for programming the charge current and a USB interface for input current negotiation."},{"question":"What fault protection does MAX8971EWP+T include?","answer":"The device provides overvoltage and reverse battery protection."},{"question":"What compliance documentation does Analog Devices provide for MAX8971EWP+T?","answer":"The part is ROHS3 compliant. No UL, REACH, or IEC certification is listed in the available documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX8971EWP~3T","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX8971EWP~3T when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}