Gehäuseinformationen
| Gehäuse | Pins WQFN (RTE) | 16 |
| Betriebstemperaturbereich (°C) -40 to 125 |
| Gehäusemenge | Träger 3.000 | LARGE T&R |
Merkmale von DRV8847
- Dual H-bridge motor driver
- Single or dual-brushed DC motors
- One bipolar stepper motor
- Solenoid loads
- 2.7-V to 18-V operating voltage range
- High output current per H-bridge
- 1-A RMS driver current at T A = 25°C
- 2-A RMS driver current in parallel mode at T A = 25°C
- Low on-state resistance at VM > 5-V
- 1000 mΩ R DS(ON) (HS + LS) at T A = 25°C
- Multiple control interface options
- 4-Pin interface
- 2-Pin interface
- Parallel bridge interface
- Independent bridge interface
- Current regulation with 20-µs fixed off-time
- Torque scalar for scaling output current to 50%
- Supports 1.8-V, 3.3-V, 5-V logic inputs
- Low-power sleep mode
- 1.7-µA Sleep mode supply current at V VM = 12-V, T A = 25°C
- I 2C Device Variant Available (DRV8847S)
- Detailed diagnostics on I 2C registers
- Multi-slave operation support
- Supports standard and fast I 2C mode
- Small packages and footprints
- 16 Pin TSSOP (no thermal pad)
- 16 Pin HTSSOP PowerPAD™ package
- 16 Pin WQFN thermal package
- Built-in protection features
- VM undervoltage lockout
- Overcurrent protection
- Open load detection
- Thermal shutdown
- Fault condition indication pin (nFAULT)
Beschreibung von DRV8847
The DRV8847 device is a dual H-bridge motor driver for industrial applications, home appliances, ePOS printers, and other mechatronic applications. This device can be used for driving two DC motors, a bipolar stepper motor, or other loads such as relays. A simple PWM interface allows an easy interface with the controller. The DRV8847 device operates off a single power supply and supports a wide input supply range from 2.7 to 18 V.
The output stage of the driver consists of N-channel power MOSFETs configured as two full H-bridges to drive motor windings or four independent half bridges (in an independent bridge interface). A fixed off time controls the peak current in the bridge which can drive a 1-A load (2-A in parallel mode with proper heat sinking, at 25°C T A).
A low-power sleep mode is provided to achieve a low quiescent current draw by shutting down much of the internal circuitry. Additionally, a torque scalar is provided which dynamically scales the output current through a digital input pin. This feature lets the controller decrease the current required for lower power consumption.
Internal protection functions are provided for undervoltage-lockout, overcurrent protection on each FET, short circuit protection, open-load detection, and overtemperature. Fault conditions are indicated by the nFAULT pin. The I 2C device variant (DRV8847S) has detailed diagnostics.