component
EA4021
Public Made by Adomby adom
Everanalog IC design Battery Management, DFN-8(2x2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownEA4021
Everanalog IC design · Battery Management · DFN-8(2x2)
EA4021 from Everanalog IC design, in a DFN-8(2x2). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TEMP | input | Battery temperature sense input for the pack NTC; charging stops if the TEMP voltage is below 45% or above 80% of VIN, and the function is disabled when TEMP is tied to GND or left floating. |
| 2 | PROG | passive | Charge current program pin, set by a resistor to ground (1% resistor recommended, e.g. 10K gives 90 mA, 2K gives 450 mA, 1K gives 900 mA); floating PROG puts the charger in shutdown. |
| 3 | GND | power_in | Power ground. |
| 4 | VIN | power_in | Power supply input; recommended 4.5V to 6.5V, absolute maximum 28V, overvoltage threshold 7V. |
| 5 | BAT | power_out | Charge output pin, connected to the battery positive terminal. |
| 6 | STDBY | output | Open-drain standby status indicator that pulls low when charging is complete. |
| 7 | CHRG | output | Open-drain charge status indicator that pulls low while charging is in progress. |
| 8 | CE | input | Charge enable input; high enables charging and low shuts charging off. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Everanalog IC design |
| Package | DFN-8(2x2) |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| BAT pin floating, input voltage range | VIN | -0.3 | 28 | V | BAT pin floating | 3 | |
| BAT pin voltage range | VBAT | -0.3 | 10 | V | 3 | ||
| PROG pin voltage range | VPROG | -0.3 | 8 | V | 3 | ||
| All other pins voltage range | -0.3 | 28 | V | 3 | |||
| BAT pin output current | IBAT | 1.2 | A | Depends on package thermal capability (note 2) | 3 | ||
| PROG pin current | IPROG | 1.2 | mA | 3 | |||
| Ambient temperature operating range | TA | -40 | 85 | °C | 3 | ||
| Junction temperature | TJmax | 125 | °C | 3 | |||
| Soldering temperature | 260 | °C | 10 sec | 3 | |||
| Storage temperature | TS | -65 | 125 | °C | 3 | ||
| Input voltage | VIN | 4.5 | 6.5 | V | 3 | ||
| Input voltage | VIN | 4.5 | 6.5 | V | VIN=5V, TA=25°C unless noted | 4 | |
| Input current, charge mode | ICC | 200 | 600 | μA | Charge mode, RPROG=10K | 4 | |
| Input current, standby mode | ICC | 75 | μA | Standby mode | 4 | ||
| Input current, shut down mode | ICC | 75 | μA | Shut Down Mode: RPROG open, VCE=0, VIN<VBAT, or VIN<VUV | 4 | ||
| Float voltage EA4021x-42 | VFLOAT | 4.158 | 4.2 | 4.242 | V | 0°C≤TA≤85°C | 4 |
| Float voltage EA4021x-43 | VFLOAT | 4.31 | 4.35 | 4.39 | V | 0°C≤TA≤85°C | 4 |
| Output current, constant current mode RPROG=10K | IBAT | 90 | mA | RPROG=10K, constant current charge mode | 4 | ||
| Output current, constant current mode RPROG=2K | IBAT | 450 | mA | RPROG=2K, constant current charge mode | 4 | ||
| Output current, standby mode | IBAT | 1 | 5 | μA | Standby mode, VBAT=VFLOAT | 4 | |
| Output current, shutdown mode | IBAT | 0.5 | 5 | μA | Shutdown mode (RPROG not connected), VCE=0 | 4 | |
| Trickle charge current | ITRIKL | 45 | mA | VBAT < VTRIKL, RPROG=2K | 4 | ||
| Trickle charge cutoff threshold | VTRIKL | 2.7 | 2.9 | 3 | V | VBAT rising, EA4021x-42/43 | 4 |
| Undervoltage lockout threshold | VUV | 3.8 | V | VIN from low to high | 4 | ||
| Undervoltage hysteresis | VUVHYS | 200 | mV | 4 | |||
| Overvoltage lockout threshold | VOV | 7 | V | VIN from low to high | 4 | ||
| Overvoltage hysteresis | VOVHYS | 400 | mV | 4 | |||
| VIN-VBAT lockout threshold, rising | VASD | 150 | mV | VIN from low to high | 4 | ||
| VIN-VBAT lockout threshold, falling | VASD | 50 | mV | VIN from high to low | 4 | ||
| 1/10 C termination current threshold RPROG=10K | ITERM | 9 | mA | RPROG=10K | 4 | ||
| 1/10 C termination current threshold RPROG=2K | ITERM | 45 | mA | RPROG=2K | 4 | ||
| PROG voltage | VPROG | 0.9 | 1 | 1.1 | V | RPROG=10K, constant current charge mode | 4 |
| CHRG and STDBY leakage current | ICHRG | 1 | μA | CE=0V | 4 | ||
| CHRG and STDBY pin voltage to GND | VCHRG | 0.1 | 0.6 | V | ICHRG=5mA | 4 | |
| Recharge threshold | VRECHRG | 4.05 | V | 4 | |||
| Temperature protection threshold (low side, printed as high-temp) | VTEMPH | 45 | %VIN | 4 | |||
| Temperature protection threshold (high side, printed as low-temp) | VTEMPL | 80 | %VIN | 4 | |||
| Thermal regulation temperature | TREG | 120 | °C | Thermal Regulation | 4 | ||
| Overtemperature protection temperature | TLIM | 160 | °C | 4 | |||
| MOS equivalent on-resistance | RDSON | 600 | mΩ | 4 | |||
| Soft-start time | TSS | 100 | μs | IBAT =0 to IBAT =100V/ RPROG (as printed) | 4 | ||
| Recharge delay | TRECHARGE | 10 | ms | VBAT High to Low | 4 | ||
| Charge termination delay | TTERM | 20 | ms | IBAT falling below ICHG 1/10 | 4 | ||
| Bad cell protection time | TBAD_CELL | 45 | min | 4 | |||
| PROG input current | IPROG | 0.5 | μA | 4 | |||
| Junction-to-ambient thermal resistance, DFN 2x2-8 | θJA | 110 | °C/W | 3 | |||
| Power dissipation, DFN 2x2-8 | PDmax | 1.14 | W | TA=25°C | 3 |
CAD (KiCad official)
- Symbol:
EA4021 - Footprint:
Package_DFN_QFN:DFN-8_2x2mm_P0.5mm - 3D model: DFN-8(2x2) (KiCad packages3D, STEP)
- 3D model files:
ea4021-etched.step/ea4021-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ea4021.step/ea4021.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Everanalog IC design datasheet (13 pp, sha256
497c4ac32ae9b06c, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).