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| DRV8804_16 Datasheet, PDF (8/27 Pages) Texas Instruments – Quad Serial Interface Low-Side Driver IC | |||
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DRV8804
SLVSAW4F â JULY 2011 â REVISED DECEMBER 2015
7 Detailed Description
www.ti.com
7.1 Overview
The DRV8804 is an integrated 4-channel low side driver solution for a low side switch application. A serial
interface controls the low-side driver outputs and allows for multiple drivers to be chained together and save
space on communication lines. The four low-side driver outputs consist of four N-channel MOSFETs that have a
typical RDS(on) of 500 mâ¦. A single motor supply input VM serves as device power and is internally regulated to
power the low side gate drive. The device outputs can be disabled by bringing nENBL pin logic high. This device
has several safety features including integrated overcurrent protection that limits the motor current to a fixed
maximum above which the device will shut down. Thermal shutdown protection enables the device to
automatically shut down if the die temperature exceeds a TTSD limit and will restart once the die reaches a safe
temperature. UVLO protection will disable all circuitry in the device if VM drops below the undervoltage lockout
threshold.
7.2 Functional Block Diagram
8.2V â 60V
VM
Internal
Reference
Regs
UVLO
Int. VCC
LS Gate
Drive
8.2V â 60V
Optional
Zener
VCLAMP
nENBL
LATCH
SDATIN
SDATOUT
SCLK
RESET
nFAULT
Control
Logic
OCP
&
Gate
Drive
OCP
&
Gate
Drive
OCP
&
Gate
Drive
OUT1
Inductive
Load
OUT2
Inductive
Load
OUT3
Inductive
Load
Thermal
Shut down
OCP
&
Gate
Drive
OUT4
Inductive
Load
GND
(multiple pins)
8
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Product Folder Links: DRV8804
Copyright © 2011â2015, Texas Instruments Incorporated
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