DRV8847 Texas instruments

DRV8847

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DRV8847

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Описание

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 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 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 TA).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 on the nFAULT pin. The I2C device variant (DRV8847S) has detailed diagnostics.

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
I²C Device Variant Available (DRV8847S)
- Detailed diagnostics on I²C registers
- Multi-slave operation support
- Supports standard and fast I²C 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)

Number of full bridges	2
Vs (min) (V)	2.7
Vs ABS (max) (V)	20
Full-scale current (A)	1
Peak output current (A)	2
RDS(ON) (HS + LS) (mΩ)	1000
Sleep current (µA)	1.7
Control mode	Independent 1/2-Bridge
Control interface	Hardware (GPIO), I2C
Features	Current Regulation, Open-Load Detection
Rating	Catalog
Operating temperature range (°C)	-40 to 125