DRV591 Datasheet, PDF (5/16 Pages) Texas Instruments – 3-A HIGH-EFFICIENCY PWM POWER DRIVER

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FUNCTIONAL BLOCK DIAGRAM
AVDD AGND
AVDD
R
2.34 × R
IN–
_
_
+
+
_
_
+
+
IN+
R
2.34 × R
SHUTDOWN
INT/EXT
FREQ
COSC
ROSC
AREF
TTL
Input
Buffer
Biases
and
References
Ramp
Generator
DRV591
SLOS389A – NOVEMBER 2001– REVISED MAY 2002
+
Gate
_
Drive
PVDD
OUT–
PGND
PVDD
+
Gate
_
Drive
OUT+
PGND
Start-Up
Protection
Logic
OC
Detect
Thermal
VDDok
FAULT0
FAULT1
5