Pin 3 (BAT) ----+---- [Battery +] ---- [Battery -] ---- GND | +---- [1uF Capacitor] ---- GND
Contrary to popular belief, "Xin Zhi Zhao" is not a single, ubiquitous chip like the LM317 or NE555. Instead, it is a specific series of power management ICs (PMICs) and battery protection circuits originating from Chinese semiconductor manufacturers, often found in low-cost Bluetooth speakers, power banks, e-cigarettes, and LED flashlights. xin zhi zhao schematic
| Pin | Name | Function Description | | :--- | :--- | :--- | | 1 | | Input voltage (4.5V to 8V, typically USB 5V) | | 2 | GND | System ground | | 3 | BAT | Battery positive connection (to 3.7V cell) | | 4 | PROG | Charge current programming (resistor to GND) | | 5 | CHRG | Open-drain charge status output (LED indicator) | | 6 | OUT | Output to load (protected 4.2V) | Note: If your board has an 8-pin chip (SOP-8), it might integrate two MOSFETs internally. You will need a specific datasheet for that XZZ model. The Complete Xin Zhi Zhao Schematic Diagram Below is a textual representation of a typical Xin Zhi Zhao application circuit . You can recreate this in EDA software like EasyEDA or KiCad. Schematic Netlist: [USB +5V] ----+---- [1uF Capacitor] ---- Pin 1 (VCC) | +---- [10k Resistor] ---- Pin 5 (CHRG) ---- [LED] ---- GND Pin 2 (GND) ------------------------------------ GND Pin 3 (BAT) ----+---- [Battery +] ---- [Battery
This article provides a comprehensive breakdown of the generic , covering the common pin configuration, typical application circuit, troubleshooting tips, and how to interpret the markings on these elusive chips. What is the Xin Zhi Zhao IC? The name "Xin Zhi Zhao" (新智兆) refers to a Shenzhen-based semiconductor design house. Their chips are typically marked with logos or codes that are often scratched off or poorly printed, leading hobbyists to search for the Xin Zhi Zhao schematic to reverse-engineer the board. You will need a specific datasheet for that XZZ model