Current-Mode PWM Controller The TL2845D is a pulse-width modulation (PWM) controller manufactured by Texas Instruments (TI). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Category:** Integrated Circuits (ICs)
- **Family:** PMIC - Voltage Regulators - DC DC Switching Controllers
- **Topology:** Boost, Flyback, Forward
- **Output Type:** Transistor Driver
- **Number of Outputs:** 1
- **Output Phases:** 1
- **Voltage - Supply (Vcc/Vdd):** 8.4V to 30V
- **Frequency - Switching:** Up to 500kHz
- **Duty Cycle (Max):** 50%
- **Synchronous Rectifier:** No
- **Clock Sync:** No
- **Operating Temperature:** -40°C to 85°C
- **Package / Case:** SOIC-8
- **Mounting Type:** Surface Mount
### **Descriptions:**
The TL2845D is a high-performance current-mode PWM controller designed for DC-DC converter applications. It provides precise regulation and high efficiency in power supply designs, including flyback, forward, and boost topologies. The device features an adjustable switching frequency, current-mode control, and under-voltage lockout (UVLO) protection.
### **Features:**
- **Current-Mode Control:** Improves loop response and simplifies compensation.
- **Adjustable Switching Frequency:** Up to 500kHz.
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the supply voltage range.
- **Soft-Start Capability:** Reduces inrush current during startup.
- **Error Amplifier:** Provides high gain-bandwidth for precise regulation.
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.
- **Totem-Pole Output:** Capable of driving power MOSFETs directly.
- **Low Startup Current:** Typically 0.5mA.
This information is based on the manufacturer's datasheet and technical documentation. For detailed electrical characteristics and application circuits, refer to the official TI datasheet.
