DRV8848 Texas instruments

DRV8848

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DRV8848

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Описание

The DRV8848 provides a dual H-bridge motor driver for home appliances and other mechatronic applications. The device can be used to drive one or two DC motors, a bipolar stepper motor, or other loads. A simple PWM interface allows easy interfacing to controller circuits. The output block of each H-bridge driver consists of N-channel and P-channel power MOSFETs configured as full H-bridges to drive the motor windings. Each H-bridge includes circuitry to regulate the winding current using a fixed off-time chopping scheme. The DRV8848 is capable of driving up to 2 A of current from each output or 4 A of current in parallel mode (with proper heat sinking, at 12 V and TA = 25°C). A low-power sleep mode is provided, which shuts down internal circuitry to achieve very-low quiescent current draw. This sleep mode can be set using a dedicated nSLEEP pin. Internal protection functions are provided for UVLO, OCP, short-circuit protection, and overtemperature. Fault conditions are indicated by a nFAULT pin.

Dual H-Bridge Motor Driver
- Single/Dual Brushed DC
- Stepper
PWM Control Interface
Optional Current Regulation With 20-µs Fixed Off-
Time
High Output Current per H-Bridge
- 2-A Maximum Driver Current at 12 V and
  T_A = 25°C
- Parallel Mode Available Capable of 4-A
  Maximum Driver Current at 12 V and
  T_A = 25°C
4- to 18-V Operating Supply Voltage Range
Low-Current 3-µA Sleep Mode
Thermally-Enhanced Surface Mount Package
Protection Features
- VM Undervoltage Lockout (UVLO)
- Overcurrent Protection (OCP)
- Thermal Shutdown (TSD)
- Fault Condition Indication Pin (nFAULT)

Number of full bridges	2
Vs (min) (V)	4
Vs ABS (max) (V)	20
Peak output current (A)	2
RDS(ON) (HS + LS) (mΩ)	900
Sleep current (µA)	3
Control mode	Independent 1/2-Bridge, PWM
Control interface	Hardware (GPIO)
Features	Current Regulation
Rating	Catalog
Operating temperature range (°C)	-40 to 85