component
HE3342EAP8
Public Made by Adomby adom
HEERMICR Battery Management, ESOP-8. 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
markdownHE3342EAP8
HEERMICR · Battery Management · ESOP-8
HE3342EAP8 from HEERMICR, in a ESOP-8. 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 | GND | power_in | Ground terminal of the charger, which must be connected to the system ground and the exposed pad. |
| 2 | VCC | power_in | Input supply pin, operating at 4.5 V to 6.5 V; when VCC is less than 30 mV above BAT the device enters low-power shutdown with BAT pin current below 2 µA. |
| 3 | CHRG | output | Open-drain charge status output that is pulled low by an internal switch while charging and is high-impedance otherwise, with a low-level output of 0.35 V to 0.5 V at 5 mA. |
| 4 | STDBY | output | Open-drain charge-complete output that is pulled low when charging is finished and is high-impedance otherwise, with a low-level output of 0.35 V to 0.5 V at 5 mA. |
| 5 | TEMP | input | Battery NTC input where charging pauses if the voltage is below 45% or above 80% of VCC, tying it to VCC disables temperature sensing, and tying it to GND puts the device in standby with charging terminated. |
| 6 | BAT | power_out | Battery positive connection that delivers the charge current and limits the battery to 4.2 V or 4.35 V, with leakage below 2 µA when disabled or in sleep mode. |
| 7 | SEN | input | Charge-current setting pin where the charge current is Ibat = 0.1/Rs, with 100 mV across the sense resistor in constant-current mode. |
| 8 | SW | power_out | Switching output connected to the external inductor, which forms the battery charge-current path, with an absolute maximum rating of -0.3 V to 7.0 V. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HEERMICR |
| Package | ESOP-8 |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN input voltage | VIN | -0.3 | 6.5 | V | 3 | ||
| VBAT terminal voltage | VBAT | -0.3 | 7 | V | 3 | ||
| CHRG, STDBY terminal voltage | -0.3 | 8 | V | 3 | |||
| SW, SEN, TEMP terminal voltage | -0.3 | 7 | V | 3 | |||
| Maximum operating junction temperature | 145 | °C | 3 | ||||
| Operating temperature range | -40 | 85 | °C | 3 | |||
| Storage temperature range | Tstg | -65 | 125 | °C | 3 | ||
| Package thermal resistance, junction to ambient | θJA | 60 | °C/W | 3 | |||
| Lead soldering temperature | -260 | 260 | °C | Soldering, 10 sec | 3 | ||
| ESD machine model | -200 | 200 | V | Machine mode | 3 | ||
| ESD human body model | -2000 | 2000 | V | Human body mode | 3 | ||
| Input supply voltage | VCC | 4.5 | 5 | 6.5 | V | 4 | |
| Input supply current, charge mode | ICC | 250 | 500 | uA | 充电模式 | 4 | |
| Input supply current, standby (charge terminated) | ICC | 220 | 280 | uA | 待机模式（充电终止） | 4 | |
| Input supply current, shutdown | ICC | 190 | 280 | uA | VCC < VBAT, or VCC < VUVLO | 4 | |
| Float (output) voltage, HE3342EA | VFLOAT | 4.16 | 4.2 | 4.25 | V | 0°C≤TA≤85°C（HE3342EA） | 4 |
| BAT constant charge current | IBAT | 900 | 1000 | 1100 | mA | 恒流模式，RS =0.1Ω | 4 |
| BAT constant charge current | IBAT | 1800 | 2000 | 2200 | mA | 恒流模式，RS =0.05Ω | 4 |
| BAT standby current | IBAT | 0 | -2 | -5 | uA | 待机模式，VBAT =4.20V | 4 |
| BAT shutdown current | IBAT | 1 | 2 | uA | 停机模式 | 4 | |
| Trickle charge current | ITRIKL | 150 | 200 | 250 | mA | VBAT＜VTRIKL, RS =0.05Ω | 4 |
| Trickle charge threshold voltage | VTRIKL | 2.8 | 2.9 | 3 | V | VBAT上升 | 4 |
| Trickle charge threshold hysteresis | VTRHYS | 70 | 100 | 130 | mV | VBAT下降 | 4 |
| VCC undervoltage lockout threshold | VUVLO | 3.6 | 3.8 | 4 | V | VCC上升 | 4 |
| VCC undervoltage lockout hysteresis | VUVHYS | 150 | 200 | 250 | mV | VCC下降 | 4 |
| VCC-VBAT lockout voltage (rising) | VASD | 120 | 200 | 280 | mV | VCC上升 | 4 |
| VCC-VBAT lockout voltage (falling) | VASD | 30 | 40 | 50 | mV | VCC下降 | 4 |
| C/10 termination current threshold | ITERM | 100 | mA | RS =0.1Ω | 4 | ||
| C/10 termination current threshold | ITERM | 200 | mA | RS =0.05Ω | 4 | ||
| CHRG output low voltage | VCHRG | 0.35 | 0.5 | V | ICHRG=5mA | 4 | |
| STDBY output low voltage | VSTDBY | 0.35 | 0.5 | V | ISTDBY=5mA | 4 | |
| TEMP pin high-side trip voltage | VTS-H | 80 | %VCC | 4 | |||
| TEMP pin low-side trip voltage | VTS-L | 45 | %VCC | 4 | |||
| Recharge threshold voltage | VRECHG | 200 | 330 | mV | VFLOAT-VRECHG | 4 | |
| Switching frequency | fosc | 1.5 | MHz | 4 | |||
| P-MOSFET on-resistance | RPFET | 150 | mΩ | 4 | |||
| N-MOSFET on-resistance | RNFET | 120 | mΩ | 4 | |||
| Soft-start time | tSS | 20 | us | 4 | |||
| Recharge delay time | tRECHG | 0.8 | 1.8 | 4 | ms | VBAT由高到低 | 4 |
| Charge termination delay time | tTERM | 0.6 | 1.4 | 3 | ms | IBAT降至 ICHG/10 以下 | 4 |
CAD (KiCad official)
- Symbol:
HE3342EAP8 - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
he3342eap8-etched.step/he3342eap8-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);he3342eap8.step/he3342eap8.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HEERMICR datasheet (10 pp, sha256
330bdc562199a265, 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-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).