Overview
The SN6501DBVR, produced by Texas Instruments, is a monolithic oscillator/power-driver designed specifically for small form factor, isolated power supplies in isolated interface applications. This device drives a low-profile, center-tapped transformer primary from a single 3.3-V or 5-V DC power supply. The secondary of the transformer can be wound to provide any isolated voltage based on the transformer turns ratio. The SN6501DBVR is housed in a small 5-Pin SOT-23 package and operates over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-23 (5) |
| Supply Voltage | 3.3 V or 5 V |
| Primary-Side Current Drive | 350 mA (Max) at 5 V, 150 mA (Max) at 3.3 V |
| Operating Temperature | –40°C to 125°C |
| Frequency | 300 kHz to 620 kHz |
| Output Voltage | Dependent on transformer turns ratio |
| Pin Configuration | D1 (Open Drain output 1), VCC (Supply voltage input), D2 (Open Drain output 2), GND (Device ground) |
Key Features
- Push-pull driver for small transformers
- Single 3.3-V or 5-V supply
- High primary-side current drive: up to 350 mA at 5 V and up to 150 mA at 3.3 V
- Low ripple on rectified output, allowing for small output capacitors
- Small 5-Pin SOT-23 package
- Internal logic ensures break-before-make action between the two switches
- Self-correcting effect on voltage-time imbalance
Applications
- Isolated interface power supplies for CAN, RS-485, RS-422, RS-232, SPI, I2C, and Low-Power LAN
- Industrial automation
- Process control
- Medical equipment
Q & A
- What is the primary function of the SN6501DBVR?
The SN6501DBVR is a monolithic oscillator/power-driver designed for driving small transformers in isolated power supply applications.
- What are the available supply voltages for the SN6501DBVR?
The device can operate from a single 3.3-V or 5-V DC power supply.
- What is the maximum primary-side current drive of the SN6501DBVR?
The maximum primary-side current drive is 350 mA at 5 V and 150 mA at 3.3 V.
- What is the operating temperature range of the SN6501DBVR?
The device operates over a temperature range of –40°C to 125°C.
- What type of package does the SN6501DBVR come in?
The SN6501DBVR is housed in a small 5-Pin SOT-23 package.
- How does the SN6501DBVR ensure voltage-time balance?
The device has a self-correcting effect on voltage-time imbalance, which helps maintain balance through changes in the MOSFET's resistance.
- What are some common applications of the SN6501DBVR?
Common applications include isolated interface power supplies for various communication protocols, industrial automation, process control, and medical equipment.
- How does the internal logic of the SN6501DBVR manage the switching of the power switches?
The internal logic ensures break-before-make action between the two switches to prevent short circuits.
- Can the SN6501DBVR be used with different transformer configurations?
Yes, the secondary of the transformer can be wound to provide any isolated voltage based on the transformer turns ratio.
- What is the frequency range of the SN6501DBVR?
The device operates at a frequency range of 300 kHz to 620 kHz.
