DRV8844 Texas instruments

DRV8844

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DRV8844

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Описание

The DRV8844 provides four individually controllable 1/2-H-bridge drivers. It can be used to drive two DC motors, one stepper motor, four solenoids, or other loads. The output driver channel for each channel consists of N-channel power MOSFET’s configured in a 1/2-H-bridge configuration. The DRV8844 can supply up to 2.5-A peak or 1.75-A RMS output current per channel (with proper PCB heatsinking at 24 V and 25°C) per H-bridge. Separate inputs to independently control each 1/2-H-bridge are provided. To allow operation with split supplies, the logic inputs and nFAULT output are referenced to a separate floating ground pin. Internal shutdown functions are provided for over current protection, short circuit protection, undervoltage lockout, and overtemperature. The DRV8844 is available in a 28-pin HTSSOP package with PowerPAD (Eco-friendly: RoHS & no Sb/Br). For all available packages, see the orderable addendum at the end of the data sheet.

Quad 1/2-H-Bridge DC Motor Driver
- Can Drive Four Solenoids, Two DC Motors, One Stepper Motor, or Other Loads
- Full Individual Half Bridge Control
- Low MOSFET On-Resistance
2.5-A Maximum Drive Current at 24 V, 25°C
Floating Input Buffers Allow Dual (Bipolar) Supplies (up to ±30 V)
Built-In 3.3-V, 10-mA LDO Regulator
Industry Standard IN/IN Digital Control Interface
8-V to 60-V Operating Supply Voltage Range
Outputs Can Be Connected in Parallel
Thermally Enhanced Surface Mount Package

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Number of full bridges	2
Vs (min) (V)	8
Vs ABS (max) (V)	65
Peak output current (A)	2.5
RDS(ON) (HS + LS) (mΩ)	480
Sleep current (µA)	500
Control mode	Independent 1/2-Bridge, PWM
Control interface	Hardware (GPIO)
Rating	Catalog
Operating temperature range (°C)	-40 to 125