The HX-JE (often marked as "HX=JE") is a specialized Non-Sensing Boost Integrated Circuit (IC) typically manufactured by HEXIN. It is designed to provide stable voltage boosting for electronic systems without requiring external sensing components, which simplifies circuit design and improves space efficiency. Core Specifications Manufacturer: HEXIN Package Type: SOT23-6 (compact 6-pin surface mount) Function: Non-sensing step-up (boost) converter Status: Lead-free / RoHS Compliant Pin Configuration (SOT23-6)

Based on standard applications for this IC type, the pinout is typically organized as follows: Pin Number Description 1 VIN Input voltage supply pin. 2 SW

Switching node; connects to the external inductor and diode. 3 GND Ground reference. 4 VOUT Boosted output voltage pin. 5 EN Enable pin; pulls high to turn on the IC, low to disable. 6 FB Feedback pin for closed-loop voltage regulation. 7 (if present) NC No connection (often reserved for specific variations). Key Features & Applications

Internal Sensing: Unlike traditional boost controllers, the HX-JE is "non-sensing," meaning it reduces the need for external feedback resistors or sensing networks in certain configurations, making it a "plug-and-play" solution for simple voltage stepping.

Power Management: Includes an Enable (EN) feature that allows the system to enter a low-power state when the boost function is not required, extending battery life in portable devices.

Typical Uses: Powering LED strings, driving small motors, and providing regulated power in battery-operated consumer electronics. Sourcing & Documentation

The HX-JE is widely available through electronic component distributors such as Jotrin Electronics and Alibaba. If you require the full technical PDF for precision timing or thermal curves, it is recommended to request the official document directly from the manufacturer or through specialized archives like Scribd. HX-JE - Discrete Semiconductors - Jotrin Electronics

4. Electrical Specifications (Top Critical Parameters)

If you are designing a circuit around the HXJE/BQ24040, these are the must-know specs:

| Parameter | Min | Typ | Max | Unit | |-----------|-----|-----|-----|------| | Input voltage (V_IN) | 4.35 | 5.0 | 6.4 | V | | Overvoltage protection threshold | 6.6 | 6.8 | 7.0 | V | | Charge voltage regulation | 4.158 | 4.20 | 4.242 | V | | Fast charge current (R_ISET=1.2k) | - | 1.0 | - | A | | Pre-charge current (R_ISET=1.2k) | - | 200 | - | mA | | Termination current (C/10) | 70 | 100 | 130 | mA | | Thermal regulation temp | - | 125 | - | °C |

9. Real-World Applications Where HXJE Is Commonly Found

Based on repair logs and teardowns, boards with the HXJE marking appear in:

In all these, the HXJE acts as the main charging controller, accepting 5V USB and safely charging a single 18650 or pouch cell.

1. Decoding the "HXJE" Top Marking

The marking "HXJE" typically follows a specific vendor logic:

After comparing thousands of IC markings, the most likely match for HXJE is the Texas Instruments BQ24040DSQT (or BQ24040 series). However, other possibilities exist depending on the PCB's origin (e.g., Chinese power bank modules, Bluetooth earbud chargers).