Description: Polol VNH5019 - single channel 24V/12A motor controller
The module with a single-channel H VNH3SP30 bridge fromST allows you to control motors supplied with voltage from 5.5 V - 24 V with continuous current consumption up to 12 A, temporary up to 30 A. The system allows changing the direction of motor rotation and speed control via PWM signal.
VNH5019 controller specification
- Power supply voltages: 5.5 V - 24 V
- Continuous output current: 12 A
- Maximum instantaneous current: 30 A
- PWM frequency: up to 20 kHz
- Output for current measurement
- LED indicators
- Safeguards
- Before the power supply is incorrectly connected
- Before the supply voltage is too high and too low
- Before short circuit to ground and supply voltage
Included:
- module with VNH5019 control unit
- power connector
- goldpin
Minimum number of connections between VNH5019 and microcontroller.
The PWM signal inputs are pulled to ground. The motor power outputs are therefore blocked by default. No potential is set by default on the INA, INB direction control outputs.
The LEDs on the board are very helpful when detecting connection problems. The brightness increases with the motor speed and the color changes with the direction of rotation.
| Pin | Description |
| VIN | 24 V power supply |
| VDD | Power supply for the logical part 2.5 V to 5 V |
| VOUT | Voltage output behind the reverse power connection protection system. |
| OUTA | Half-bridge A output of the motor supply |
| OUTB | Half-bridge B output of the motor supply |
| PWM | PWM signal input pulled to ground by default (up to 20 kHz) |
| INA/INB | Reversal of direction of rotation. Not connected by default. |
| GND | Mass |
| CS | Current measurement outputs. 140mV on 1A. Active when CS_DIS PIN is low. |
| ENA/DIAGA | Half-bridge A lock. Low state I lock the operation of half-bridge A. By default in high state. |
| ENB/DIAGB | Half-bridge lock B. Low state I'm blocking half-bridge B. Default high state. |
| CS_DIS | Current measurement output blockade. High state I'm blocking the CS output. Default low state. |
VNH519 schematic.
| VNH3SP30 | VNH2SP30 | VNH5019 | |
| Supply voltage | 5.5 – 16 V | 5.5 – 16 V | 5.5 – 24 V |
| MOSFET Resistance | 34 mΩ type. | 19 mΩ max. | 18 mΩ type. |
| Max. PWM frequency | 10 kHz | 20 kHz | 20 kHz |
| Current measurement output | n/a | 0.13 V/A | 0.13 V/A |
| Minimum level of logical signals | 3.25 V | 3.25 V | 2.1 V |
| Overheating time at 20 A | 8 s | 35 s | 20 s |
| Overheating time at 15 A | 30 s | 150 s | 90 s |
| Continuous current | 9 A | 14 A | 12 A |
Useful links |
