Overview
The UCC3804NG4, produced by Texas Instruments, is a low-power BiCMOS current-mode PWM controller. This device is part of the UCC380x family, which is designed for off-line and DC-to-DC fixed frequency current-mode switching mode power supplies. It offers a minimal parts count and is suitable for various power supply applications due to its high-speed and low-power characteristics.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Package Type | SOIC | |
| Pins | 8 | |
| Operating Temperature Range | 0 to 70 | °C |
| Control Method | Current | |
| Duty Cycle (Max) | 50 % | |
| Frequency (Max) | 1000 kHz | |
| Gate Drive (Typ) | 1 A | |
| UVLO Thresholds On/Off | 12.5/8.3 V | |
| Vin (Max) | 400 V | |
| Vin (Min) | 12.5 V | |
| Special Features | Error Amplifier, Leading Edge Blanking, Multi-topology, Soft Start | |
| Topology | Boost, Buck, Flyback, Forward |
Key Features
- 100-µA typical starting supply current and 500-µA typical operating supply current
- Operation up to 1 MHz
- Internal soft start and internal fault soft start
- Internal leading-edge blanking of the current-sense input
- 1-A totem-pole output
- 70-ns typical response from current-sense to gate drive output
- 1.5% tolerance voltage reference
- Same pinout as UC3842 and UC3842A
Applications
The UCC3804NG4 is suitable for a variety of power supply applications, including:
- Off-line and DC-to-DC fixed frequency current-mode switching mode power supplies
- Boost, Buck, Flyback, and Forward converter topologies
- Battery-powered and automotive applications
- Low-power DC-to-DC converters and inverters
Q & A
- What is the operating temperature range of the UCC3804NG4?
The operating temperature range is 0 to 70°C.
- What is the maximum frequency of operation for the UCC3804NG4?
The maximum frequency of operation is 1000 kHz.
- What are the UVLO thresholds for the UCC3804NG4?
The UVLO thresholds are 12.5 V for on and 8.3 V for off.
- What is the typical gate drive current of the UCC3804NG4?
The typical gate drive current is 1 A.
- Does the UCC3804NG4 support multiple topologies?
Yes, it supports Boost, Buck, Flyback, and Forward converter topologies.
- What is the response time from current-sense to gate drive output?
The typical response time is 70 ns.
- Does the UCC3804NG4 have internal soft start and fault soft start features?
Yes, it has both internal soft start and internal fault soft start features.
- What is the voltage reference tolerance of the UCC3804NG4?
The voltage reference tolerance is 1.5%.
- Is the UCC3804NG4 RoHS compliant?
Yes, it is RoHS compliant.
- What is the package type of the UCC3804NG4?
The package type is SOIC with 8 pins.
