component
ETA9740E8A
Public Made by Adomby adom
etasolution Battery Management, ESOP8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownETA9740E8A
etasolution · Battery Management · ESOP8
ETA9740E8A from etasolution, in a ESOP8. 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 | SW | output | Inductor connection: connect an inductor between SW and the regulator output. |
| 2 | LED1 | output | Fuel gauge LED1 and LED2 connection pin. |
| 3 | LED2 | output | Fuel gauge LED3 and LED4 connection pin (as printed; the name LED2 and the description do not match, see review notes). |
| 4 | LED3 | output | Fuel gauge LED1, LED2, LED3 and LED4 connection pin (as printed in the datasheet). |
| 5 | ISET | passive | Buck charging current setting pin: connect a resistor between this pin and analog ground to set the charge current level. |
| 6 | BAT | bidirectional | Battery pin: connect the Li-ion battery here and place a 10uF bypass capacitor with it. |
| 7 | OUT | bidirectional | Output pin: bypass with a 22uF or larger ceramic capacitor placed close between this pin and GND. |
| 8 | PGND | power_in | Power ground pin. |
| 9 | AGND | power_in | Analog ground pin, also the exposed pad of the ESOP-8 package. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | etasolution |
| Package | ESOP8 |
| Category | Power Management (PMIC) |
| Pins | 9 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| USB Range | 4.5 | 5.5 | V | 2 | |||
| Battery CV Voltage | 4.17 | 4.21 | 4.25 | V | IBAT =0mA, default | 2 | |
| Output Voltage Range | 5.05 | 5.1 | 5.15 | V | Iout=0 | 2 | |
| Switching Frequency | 550 | 650 | 750 | KHz | VIN<4.3V | 2 | |
| Operating Temperature Range | -40 | 85 | °C | 2 | |||
| Storage Temperature Range | -55 | 150 | °C | 2 | |||
| ESD HBM (Human Body Model) | 2 | KV | 2 | ||||
| ESD MM (Machine Model) | 200 | V | 2 | ||||
| OUT, SW Voltage | -0.3 | 6 | V | 2 | |||
| All Other Pin Voltage | -0.3 | 6 | V | 2 | |||
| Thermal Resistance JA (ESOP8) | JA | 10 | °C/W | 2 | |||
| Thermal Resistance Jc (ESOP8) | Jc | 50 | °C/W | 2 | |||
| USB UVLO Voltage | 4.5 | V | Voltage Rising, Hys=500mV | 2 | |||
| USB Operating Current as BUCK | 5 | mA | Switcher Enable, Switching | 2 | |||
| USB Operating Current as BUCK | 800 | μA | Switcher Enable, No Switching | 2 | |||
| Charger Restart Threshold From DONE to Fast Charge | -160 | mV | 2 | ||||
| Battery Pre-Condition Voltage | 2.8 | V | VBAT Rising Hys=250mV | 2 | |||
| Pre-Condition Charge Current | 200 | mA | 2 | ||||
| Fast Charge Current | 3 | A | Riset=56K | 2 | |||
| Fast Charge Current | 2 | A | Riset=91K | 2 | |||
| Charge Termination Current | 200 | mA | 2 | ||||
| Charge Termination Blanking time | 16 | S | 2 | ||||
| BATT Ok Threshold | 3.2 | V | Rising, HYS=0.4V | 2 | |||
| Quiescent Current | 80 | μA | At BATT Vbat=3.6V | 2 | |||
| Inductor Peak Current Limit | 5 | A | 2 | ||||
| Maximum Duty Cycle | 90 | % | 2 | ||||
| Highside Pmos Rdson | 75 | mΩ | ISW =500mA | 2 | |||
| Low side Nmos Rdson | 70 | mΩ | ISW =500mA | 3 | |||
| Short Circuit Hiccup Current | 3.8 | A | 3 | ||||
| Short Circuit Hiccup Timer On Time | 45 | ms | 3 | ||||
| Short Circuit Hiccup Timer Off Time | 2000 | ms | 3 | ||||
| Charging Thermal Regulation threshold | 85 | °C | 3 | ||||
| Thermal Shutdown | 150 | °C | Rising, Hys=20°C | 3 |
CAD (KiCad official)
- Symbol:
ETA9740E8A - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm - 3D model: ESOP8 (KiCad packages3D, STEP)
- 3D model files:
eta9740e8a-etched.step/eta9740e8a-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);eta9740e8a.step/eta9740e8a.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: etasolution datasheet (5 pp, sha256
ae4c4d10be8f1025, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-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).