# Battery Charger V0.1 ## Description Replace CN3063 Li-ion Charger IC in Eventual Orange Scramble Suit with Pin-Compatible, More Sourced SOP-8-EP Alternative ## Project Details - **Owner:** collinsemasi - **Created:** 2/5/2026 - **Last Updated:** 2/5/2026 - **Visibility:** Public - **U1_Specifications:** Function: Single-cell Li-ion linear charger IC for USB/adapter input with precharge, constant-current/constant-voltage algorithm, and charge status indication. Electrical limits: VIN operating range per datasheet (USB/adapter input), VBAT regulation voltage and allowable battery range per datasheet, programmable fast charge current via ISET (observe absolute max and thermal derating), integrated thermal regulation and thermal shutdown (junction temperature limits per datasheet). Required passives: Input bypass capacitor from VIN to GND, output/battery capacitor from BAT to GND as recommended, ISET resistor from ISET to GND to set fast charge current, optional NTC thermistor network on TEMP, feedback network on FB (if used per datasheet application), pull-up resistors and indicator LEDs or logic loads on ~DONE and ~CHARG as required. Pin functions: TEMP (Pin 1) – Battery temperature sense / NTC input; ISET (Pin 2) – Charge current program pin; GND (Pin 3) – Ground reference; VIN (Pin 4) – Input supply from USB/adapter; BAT (Pin 5) – Battery connection / charge output; ~DONE (Pin 6) – Charge complete status output (active low); ~CHARG (Pin 7) – Charging status output (active low); FB (Pin 8) – Feedback pin (used per datasheet for regulation/compensation as applicable); PAD (Pin 9, exposed pad) – Thermal pad, connect to GND plane per layout guidelines. Package: SOP-8-EP (8-pin SOP with exposed thermal pad). - **U1_Candidate_MPNs:** - CN3065 (Consonance) — Preliminary availability: listed in vendor/distributor references; Lifecycle status: appears active (verify with DigiKey/Mouser); Preliminary pinout compatibility: TEMP, ISET, GND, VIN, BAT, CHRG/STAT, FB present in SOP-8 family (likely close to CN3063 pin functions) — datasheet verification required. - CN3082 (Consonance) — Preliminary availability: documented in Consonance family literature; Lifecycle status: appears active; Preliminary pinout compatibility: TEMP, ISET, GND, VIN, BAT, STAT/CHRG, FB in SOP-8-style package (verify exact pin ordering against CN3063). - FP8102 (Feeling / Advanced Analog Technology or equivalent) — Preliminary availability: referenced on distributor/product pages; Lifecycle status: appears active; Preliminary pinout compatibility: single-cell linear Li-ion charger in SOP-8/MSOP-8 with exposed pad, programmable ISET, TEMP, status outputs and FB (datasheet check needed for exact pin mapping). Notes: Each candidate above meets the functional requirements at a high level (single-cell linear Li-ion charger, programmable ISET, TEMP input, status outputs, FB, SOP-8/EP package). All entries are preliminary — datasheet review is required to confirm VIN/VBAT limits, ISET programming range/absolute max, thermal regulation/shutdown behavior, exact pin ordering for drop-in compatibility, and current sourcing/availability and formal lifecycle status (active, legacy, obsolete) from primary distributors. - **Part Type:** Integrated Circuit - **Package or Case Code:** 8-SOP - **Integrated Circuit Type:** Power Management - **U1_Replacement_Candidates:** - U2: CN3065 (Consonance) — Availability: listed in vendor/distributor references; Lifecycle status: appears active; Pinout Compatibility: TEMP, ISET, GND, VIN, BAT, ~DONE, ~CHARG, FB functions present in SOP-8-EP with likely matching pin order. - U3: CN3082 (Consonance) — Availability: documented in Consonance family literature; Lifecycle status: appears active; Pinout Compatibility: TEMP, ISET, GND, VIN, BAT, STAT/~CHARG, FB in SOP-8-EP; datasheet check needed for exact pin mapping. - U4: FP8102 (Feeling/Advanced Analog Technology) — Availability: referenced on distributor/product pages; Lifecycle status: appears active; Pinout Compatibility: single-cell linear Li-ion charger in SOP-8-EP with TEMP, ISET, GND, VIN, BAT, status outputs, and FB; verify precise pin arrangement. - **Mount:** Surface Mount - **Copies:** 2 ## Key Components ### U1 — [CN3063](https://www.flux.ai/collinsemasi/cn3063.md) - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2410121502_ShangHai-Consonance-Elec-CN3063_C28078.pdf - Manufacturer Name: Shanghai Consonance Elec - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Package or Case Code: SOP-8-EP - Manufacturer Part Number: CN3063 **Pins:** - 9 [pin 9] - ~CHARG [pin 7] - ~DONE [pin 6] - BAT [pin 5] - FB [pin 8] - GND [pin 3] - ISET [pin 2] - TEMP [pin 1] - VIN [pin 4] ### U2 — [CN3065](https://www.flux.ai/adrian95/cn3065.md) - Role Details: Single-cell Li-ion linear charger replacement for CN3063 with TEMP, ISET, status outputs, and exposed pad to GND - Datasheet URL: https://www.snapeda.com/parts/CN3065/Seeed%20Technology/datasheet/ - Manufacturer Name: Seeed - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: CN3065 - Role: Battery Charger - Package: SOP-8-EP **Pins:** - ~CHRG [pin 7] - ~DONE [pin 6] - BAT [pin 5] - EXP [pin 9] - FB [pin 8] - GND [pin 3] - ISET [pin 2] - TEMP [pin 1] - VIN [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/collinsemasi/battery-charger-v0p1](https://www.flux.ai/collinsemasi/battery-charger-v0p1).* --- *Generated from [https://www.flux.ai/collinsemasi/battery-charger-v0p1](https://www.flux.ai/collinsemasi/battery-charger-v0p1)*