Overview
The SN6505ADBVR, produced by Texas Instruments, is a low-noise, 1-A, 160-kHz transformer driver designed for isolated power supplies. This device is part of the SN6505x series, which includes the SN6505A and SN6505B models. The SN6505ADBVR is specifically tailored for small form factor applications, driving low-profile, center-tapped transformers from a 2.25 V to 5 V DC power supply. It features ultra-low noise and EMI, achieved through slew rate control of the output switch voltage and Spread Spectrum Clocking (SSC).
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.25 V to 5.5 V | V |
| Output Drive Current | 1 A at 5 V supply | A |
| Output Switch On Resistance (RON) | 0.25 Ω max at 4.5 V supply | Ω |
| Internal Oscillator Frequency | 160 kHz (SN6505A) | kHz |
| Current Limit | 1.7 A | A |
| Shutdown Current | <1 µA | µA |
| Temperature Range | –55°C to 125°C | °C |
| Package Type | 6-Pin SOT23 (DBV) |
Key Features
- Push-pull driver for transformers
- Ultra-low EMI and noise through slew rate control and Spread Spectrum Clocking (SSC)
- Synchronization of multiple devices with external clock input
- Slew-rate control for output switch voltage
- Soft-start feature to reduce inrush current during power-up
- Internal protection features: 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry
- Small 6-pin SOT23 (DBV) package
Applications
- Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, and low-power LAN
- Low-noise isolated USB supplies
- Process control
- Telecom supplies
- Radio supplies
- Distributed supplies
- Medical instruments
- Precision instruments
- Low-noise filament supplies
Q & A
- What is the input voltage range of the SN6505ADBVR?
The input voltage range is 2.25 V to 5.5 V.
- What is the maximum output drive current of the SN6505ADBVR?
The maximum output drive current is 1 A at a 5 V supply.
- What is the internal oscillator frequency of the SN6505ADBVR?
The internal oscillator frequency is 160 kHz for the SN6505A model.
- What are the key features for reducing EMI and noise in the SN6505ADBVR?
The key features include slew rate control of the output switch voltage and Spread Spectrum Clocking (SSC).
- What is the current limit of the SN6505ADBVR?
The current limit is 1.7 A.
- What is the shutdown current of the SN6505ADBVR?
The shutdown current is less than 1 µA.
- What is the temperature range for the SN6505ADBVR?
The temperature range is –55°C to 125°C.
- What package type is the SN6505ADBVR available in?
The SN6505ADBVR is available in a 6-pin SOT23 (DBV) package.
- What are some of the internal protection features of the SN6505ADBVR?
The internal protection features include 1.7 A current limiting, under-voltage lockout, thermal shutdown, and break-before-make circuitry.
- Does the SN6505ADBVR support synchronization with external clock inputs?
Yes, the SN6505ADBVR supports synchronization of multiple devices with an external clock input.
