High-Performance Current-Mode PWM Controller 8-SOIC 0 to 70 The TL3842BD-8 is a PWM controller IC manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** TL3842BD-8
- **Package:** SOIC-8 (D)
- **Type:** Current-Mode PWM Controller
- **Operating Voltage Range:** 7V to 30V
- **Output Duty Cycle:** Up to 100%
- **Switching Frequency:** Up to 500 kHz
- **Output Current (Source/Sink):** 1A (Peak)
- **Error Amplifier Gain Bandwidth:** 1 MHz (Typical)
- **Start-Up Current:** 1 mA (Typical)
- **Undervoltage Lockout (UVLO):** 7V (Turn-On), 10V (Turn-Off)
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The TL3842BD-8 is a fixed-frequency current-mode PWM controller designed for DC-DC converter and offline power supply applications. It features an integrated high-gain error amplifier, current sensing comparator, and a totem-pole output stage capable of driving power MOSFETs. The device includes an undervoltage lockout (UVLO) circuit for reliable start-up and shutdown.
### **Features:**
- **Current-Mode Control:** Ensures cycle-by-cycle current limiting.
- **Adjustable Oscillator Frequency:** Set by external timing components.
- **Precision Reference Voltage:** 5V (±1%) for stable regulation.
- **Error Amplifier:** High gain-bandwidth for tight output regulation.
- **Soft-Start Capability:** Reduces inrush current during start-up.
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.
- **Totem-Pole Output:** Directly drives MOSFETs with 1A peak current.
- **Low Start-Up Current:** Enables efficient operation in low-power applications.
- **Undervoltage Lockout (UVLO):** Ensures proper operation under low-voltage conditions.
This information is sourced from the manufacturer's datasheet.
