Charging System Safety Circuit The ISL9209IRZ-T is a battery charger IC manufactured by Intersil (now part of Renesas Electronics). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Intersil (Renesas Electronics)
- **Part Number:** ISL9209IRZ-T
- **Package:** 16-Lead QFN (4mm x 4mm)
- **Input Voltage Range:** 4.35V to 6.5V
- **Charge Voltage Accuracy:** ±0.5%
- **Charge Current Range:** Programmable up to 1.5A
- **Battery Chemistry Support:** Single-Cell Li-ion/Li-polymer
- **Operating Temperature Range:** -40°C to +85°C
- **Charge Termination:** C/10 or Timer-Based
- **Pre-Charge Current:** Programmable
- **Thermal Regulation:** Yes
- **Status Indicators:** Charge Status Output
### **Descriptions:**
The ISL9209IRZ-T is a highly integrated, standalone Li-ion/Li-polymer battery charger IC designed for portable applications. It features a constant-current/constant-voltage (CC/CV) charging algorithm with thermal regulation to optimize charging efficiency and safety. The device includes an internal MOSFET, reverse-blocking diode, and current sensing, reducing external component count.
### **Features:**
- **Standalone Operation:** No external microcontroller required.
- **Programmable Charge Current:** Up to 1.5A via external resistor.
- **Thermal Regulation:** Reduces charge current if temperature exceeds safe limits.
- **Automatic Recharge:** Initiates charging if battery voltage drops below threshold.
- **Charge Status Output:** Indicates charging, completion, or fault conditions.
- **Reverse Polarity Protection:** Safeguards against incorrect battery insertion.
- **Low Battery Leakage Current:** Minimizes discharge when input power is removed.
- **Pre-Charge Mode:** For deeply discharged batteries.
This information is based on the manufacturer's datasheet and technical documentation.
