Current Mode PWM Controller 8-PDIP -40 to 85 The UC2845ANG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Texas Instruments
- **Category:** Integrated Circuits (ICs)
- **Family:** PMIC - Voltage Regulators - DC DC Switching Controllers
- **Topology:** Buck, Boost, Flyback, Forward
- **Control Mode:** Current Mode
- **Output Type:** Transistor Driver
- **Number of Outputs:** 1
- **Frequency - Switching:** Up to 500kHz
- **Duty Cycle (Max):** 100%
- **Supply Voltage (Vcc/Vdd):** 8V to 30V
- **Operating Temperature Range:** -40°C to +85°C
- **Package / Case:** PDIP-8 (Plastic Dual In-Line Package)
- **Mounting Type:** Through Hole
### **Descriptions:**
- The UC2845ANG4 is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC power supply applications.
- It features current-mode control, which simplifies loop compensation and improves transient response.
- The device includes an internal trimmed oscillator, precision reference, high-gain error amplifier, and current-sensing comparator.
- It is designed for offline and DC-DC converters with minimal external components.
### **Features:**
- **Current-Mode Operation:** Provides inherent line feedforward, cycle-by-cycle current limiting, and simplified loop compensation.
- **Automatic Feedforward Compensation:** Ensures consistent response over varying input voltages.
- **Trimmed Oscillator:** Precise frequency control with external timing components.
- **Undervoltage Lockout (UVLO):** Ensures proper startup and shutdown behavior.
- **High-Current Totem Pole Output:** Capable of driving power MOSFETs directly.
- **Internal Soft-Start:** Reduces inrush current during startup.
- **Low Startup and Operating Current:** Improves efficiency in standby applications.
This information is based solely on the manufacturer's datasheet and technical documentation.
