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SLOS390A – NOVEMBER 2001– REVISED MAY 2002
Terminal Functions
TERMINAL
I/O DESCRIPTION
NAME
AGND
NO.
2
Analog ground
AVDD
FAULT0
FAULT1
HI-Z
1
I
O
O
I
Analog power supply
5
Fault flag 0, low when active open drain output (see application information)
Fault flag 1, low when active open drain output (see application information)
4
3
Places both outputs of the H-bridge into a high-impedance state (2 kΩ to ground) when a TTL logic low is
applied to this terminal; normal operation when a TTL logic high is applied.
IN–
7
I
I
Negative H-bridge input
IN+
6
Positive H-bridge input
OUT–
OUT+
PGND
PVDD
13–17
24–28
18–23
O
O
Negative H-bridge output (5 terminals)
Positive H-bridge output (5 terminals)
High-current ground (6 terminals)
High-current power supply (8 terminals)
9–12,
29–32
I
I
SHUTDOWN
8
Places the amplifier in shutdown mode when a TTL logic low is applied to this terminal; places the amplifier in
normal operation when a TTL logic high is applied
FUNCTIONAL BLOCK DIAGRAM
AVDD
AVDD
AGND
PVDD
OUT+
Gate
Drive
IN+
IN+
TTL
Input
IN–
IN–
Buffer
PGND
PVDD
SDZ
SHUTDOWN
OUT–
Gate
Drive
HI-Z
PGND
Biases
and
References
Start-Up
Protection
Logic
OC
Detect
Thermal
VDDok
FAULT0
FAULT1
4
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