Current-Mode PWM Controller The TL2843DR-8 is a PWM controller IC manufactured by Texas Instruments (TI). Here are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** TL2843DR-8
- **Type:** Current-Mode PWM Controller
- **Package:** SOIC-8
- **Operating Temperature Range:** -40°C to +85°C
- **Input Voltage Range (VCC):** 7V to 30V
- **Switching Frequency:** Up to 500 kHz (adjustable with external components)
- **Output Drive Current:** ±200 mA (peak)
- **Duty Cycle Range:** 0% to 100%
- **Reference Voltage:** 5V (±1% accuracy)
- **Start-Up Current:** <1 mA
- **UVLO (Undervoltage Lockout):** 7V (on), 6V (off)
### **Descriptions:**
- The TL2843DR-8 is a high-performance current-mode PWM controller designed for DC-DC converter applications.
- It features a fixed-frequency oscillator, error amplifier, current-sensing comparator, and a totem-pole output driver.
- The device is optimized for offline and DC-DC power supplies with minimal external components.
- It includes built-in protections such as undervoltage lockout (UVLO) and cycle-by-cycle current limiting.
### **Features:**
- **Current-Mode Control:** Improves loop response and simplifies compensation.
- **Adjustable Frequency:** Set via external resistor and capacitor.
- **Precision Reference Voltage:** 5V with ±1% tolerance.
- **Low Start-Up Current:** Ensures efficient power-up.
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.
- **Wide Input Voltage Range:** Supports 7V to 30V operation.
- **SOIC-8 Package:** Compact and suitable for space-constrained designs.
This information is based solely on the manufacturer's datasheet and technical documentation.
