High Performance Current Mode Controller The UC2842B is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are the specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Input Voltage (VCC):** 8.4V to 30V
- **Operating Frequency:** Up to 500 kHz
- **Output Current (Peak):** ±1A
- **Duty Cycle Range:** 0% to 100%
- **Reference Voltage (VREF):** 5V ±1%
- **Start-up Current:** <1mA
- **Operating Temperature Range:** -40°C to +85°C
- **Package Options:** SO-8, PDIP-8
### **Descriptions:**
- The UC2842B is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converter applications.
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.
- The device includes features such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a built-in trimmed bandgap reference.
- It is commonly used in offline and DC-DC power supplies, battery chargers, and LED drivers.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies loop stabilization.
- **Automatic Feed-Forward Compensation:** Improves line regulation.
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.
- **Trimmed Oscillator Discharge Current:** Tightens frequency control.
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.
- **Low Start-up and Operating Current:** Reduces power consumption.
- **Internal Soft-Start:** Minimizes stress during power-up.
This information is based on the manufacturer's datasheet and technical documentation.
