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EA4021

Public Made by Adom

by adom

Everanalog IC design Battery Management, DFN-8(2x2). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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EA4021

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.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ea4021.step / ea4021.glb are 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, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF