CURRENT MODE PWM CONTROLLER The UC2842D is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are its specifications, descriptions, and features based on factual information:
### **Specifications:**
- **Manufacturer:** STMicroelectronics
- **Type:** Current-Mode PWM Controller
- **Topology:** Flyback, Forward, Boost, Buck
- **Input Voltage (VCC):** 8.4V to 30V (Operating), 16V (Max Absolute)
- **Output Drive Current:** ±1A (Peak)
- **Switching Frequency:** Up to 500kHz
- **Duty Cycle Range:** 0% to 100%
- **Reference Voltage (VREF):** 5V ±1%
- **Operating Temperature Range:** -40°C to +85°C
- **Package:** SOIC-8
### **Descriptions:**
The UC2842D is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converters. It incorporates a current-mode control architecture for improved loop response and simplified compensation. The device includes features such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed bandgap reference.
### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within specified voltage range.
- **Trimmed Oscillator Discharge Current:** Provides accurate frequency control.
- **High-Current Totem Pole Output:** Directly drives power MOSFETs with ±1A peak current.
- **Programmable Soft-Start:** Reduces inrush current during startup.
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.
- **Low Startup Current (<1mA):** Reduces power consumption during initial operation.
- **Error Amplifier with High Gain-Bandwidth Product:** Ensures stable feedback loop performance.
This information is based solely on the manufacturer's datasheet for the UC2842D from STMicroelectronics.
