DRV8847 2A dual H-bridge motor driver | TI.com

DRV8847
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2A dual H-bridge motor driver

2A dual H-bridge motor driver - DRV8847
Datasheet
 

Description

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.

Features

  • 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 TA = 25°C
    • 2-A RMS driver current in parallel mode at TA = 25°C
  • Low on-state resistance at VM > 5-V
    • 1000 mΩ RDS(ON) (HS + LS) at TA = 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 VVM = 12-V, TA = 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)

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Parametrics

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Part number Order Number of full bridges Vs (Min) (V) Vs (Max) (V) Peak output current (A) Control mode Control interface Micro-stepping levels Features Package size: mm2:W x L (PKG) RDS(ON) (HS + LS) (mOhms) Approx. price (US$)
DRV8847 Order now 2     2.7     18     2     PWM     Hardware (GPIO)
I2C    
  Current Regulation
Open-Load Detection    
16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
1000     0.80 | 1ku    
DRV8833 Order now 2     2.7     10.8     2     PWM     Hardware (GPIO)       Current Regulation     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16QFN: 16 mm2: 4 x 4 (QFN | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
360     0.90 | 1ku    
DRV8833C Order now 2     2.7     10.8     1     PWM     Hardware (GPIO)       Current Regulation     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)
16WQFN: 9 mm2: 3 x 3 (WQFN | 16)    
1735     0.75 | 1ku    
DRV8834 Order now 2     2.5     10.8     2     PH/EN
STEP/DIR    
Hardware (GPIO)     32     Current Regulation     24HTSSOP: 34 mm2: 4.4 x 7.8 (HTSSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
305     1.15 | 1ku    
DRV8848 Order now 2     4     18     2     PWM     Hardware (GPIO)       Current Regulation     16HTSSOP: 32 mm2: 6.4 x 5 (HTSSOP | 16)     900     0.94 | 1ku