DIGILENT PmodOD1 Open-Drain MOSFETs to Drive User Manual
- June 12, 2024
- DIGILENT
Table of Contents
DIGILENT PmodOD1 Open-Drain MOSFETs to Drive
Revised May 26, 2016
This manual applies to the PmodOD1 rev. A 1300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com
Overview
The Digilent PmodOD1 uses open-drain MOSFETs to drive high-current applications.
The PmodOD1 features include:
- Two dual-power N-FETs
- Comfortable drives 3.0 A of continuous Specification Type1
Functional Description
The PmodOD1 communicates with the host board via the GPIO protocol. A logic high signal turns on a particular MOSFET and a logic low signal turns off the MOSFET.
Pin Signal Description
| Pin | Signal | Description |
|---|---|---|
| 1 | G1 | Output 1 |
| 2 | G2 | Output 2 |
| 3 | G3 | Output 3 |
| 4 | G4 | Output 4 |
| 5 | GND | Power Supply Ground |
| 6 | VCC | Positive Power Supply (3.3/5V) |
Typical Circuit
Each output provides a clamp diode to prevent damage due to flyback voltages generated by inductive loads. Each output transistor functions independently of the others, so they can be used individually or simultaneously.
External Load Connection
As illustrated in Figure 2, a load is connected so that current from an external voltage source conducts through the load to the ground when the output transistor is turned on. In order to complete the circuit, the GND pin on J4 must be connected to the ground for the external voltage supply. Additionally, the external voltage source must be connected to the VL pin on J4 to complete the circuit for the output clamp diode.
Power Requirements
Any external power applied to the PmodOD1 must be within 2.7V and 5.25V; however, it is recommended that Pmod is operated at 3.3V.
Physical Dimensions
The pins on the pin header are spaced 100 mil apart. The PCB is 1.15 inches long on the sides parallel to the pins on the pin header and 0.8 inches long on the sides perpendicular to the pin header.
Overview
The Digilent PmodOD1 uses open-drain MOSFETs to drive high current applications.
Featu res include
- Two dual power N-FETs
- Comfortable drives 3.0 A of continuous current
- 4.1 A peak output current (t < 5 s)
- 20 V maximum output voltage
- Four output clamp diodes
- Small PCB size for flexible designs 1.2“ × 0.8” (3.0 cm × 2.0 cm)
- 6-pin Pmod connector with GPIO interface
- Follows Digilent Pmod Interface Specification Type 1
Functional Description
- The PmodOD1 utilizes two NTHD4508 dual power N-FETs. Each channel can comfortably drive 3.0 A of continuous current at 25°C and up to 4.1 A of current for under 5 seconds, making this Pmod ideal for high current applications that require a simple on/off switch mechanism.
Interfacing with the Pmod
- The PmodOD1 communicates with the host board via the GPIO protocol. A logic high signal “turns on” a particular MOSFET and a logic low signal turns off the MOSFET.
| Pin | Signal | Description |
|---|---|---|
| 1 | G1 | Output 1 |
| 2 | G2 | Output 2 |
| 3 | G3 | Output 3 |
| 4 | G4 | Output 4 |
| 5 | GND | Power Supply Ground |
| 6 | VCC | Positive Power Supply (3.3/5V) |
Table 1. Pinout description table.
- Each output provides a clamp diode to prevent damage due to flyback voltages generated by inductive loads.
- Each output transistor functions independently of the others, so they can be used individually or simultaneously.
- As illustrated in Fig. 2, a load is connected so that current from an external voltage source conducts through the load to ground when the output transistor is turned on. In order to complete the circuit, the GND pin on J4 must be connected to the ground for the external voltage supply. Additionally, the external voltage source must be connected to the VL pin on J4 to complete the circuit for the output clamp diode.
- Any external power applied to the PmodOD1 must be within 2.7V and 5.25V; however, it is recommended that Pmod is operated at 3.3V.
Physical Dimensions
The pins on the pin header are spaced 100 mil apart. The PCB is 1.15 inches long on the sides parallel to the pins on the pin header and 0.8 inches long on the sides perpendicular to the pin header.
- Copyright Digilent, Inc. All rights reserved.
- Other product and company names mentioned may be trademarks of their respective owners.
- 1300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com
Documents / Resources
|
DIGILENT PmodOD1 Open-Drain MOSFETs to
Drive
[pdf] User Manual
PmodOD1 rev. A, PmodOD1 Open-Drain MOSFETs to Drive, PmodOD1, Open-Drain
MOSFETs to Drive
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