AAT4901 Datasheet, PDF (8/16 Pages) Advanced Analogic Technologies – Buffered Power Full-Bridge

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AAT4901-1
H-bridge configuration with two enables. Enable B is
active high and enables the H-bridge output. Enable A
toggles the H-bridge outputs A and B in anti-phase. In
steady state, this can provide forward/reverse motor
drive signals.
AAT4901-2
H-bridge configuration with two enables. Enable A and
Enable B are in anti-phase and provide forward/reverse
and braking.
AAT4901-3
Dual independent half-bridge configuration with four
enables. Function similar to 2 x AAT4900.
AAT4901-4
H-bridge with two enables. Enable A and Enable B are in
anti-phase and toggle the H-bridge outputs A and B in
anti-phase respectively. In steady state, this can provide
forward/reverse motor drive signals to adjust the motor
speed by various duty cycles.
PRODUCT DATASHEET
AAT4901
Buffered Power Full-Bridge
AAT4901-1/-4 Logic Table
-1
ENA ENB
0
0
1
0
0
1
1
1
-4
ENA ENB
0
0
1
1
1
0
0
1
OUTA
Hi Z
Hi Z
IN
GND
OUTB
Hi Z
Hi Z
GND
IN
AAT4901-2 Logic Table
ENA
0
1
0
1
ENB
0
0
1
1
OUTA
Hi Z
IN
GND
IN
OUTB
Hi Z
GND
IN
IN
AAT4901-3 Logic Table
ENA/C
0
1
0
1
ENB/D
0
0
1
1
OUTA/B
Hi Z
Hi Z
IN
GND
Timing Diagram
V_ENA
50%
V_OUTA
10%
TON-DLY-R
V_ENB
50%
50%
90%
TON- DLY -F
50%
50%
50%
T ON-DLY-R
(OFF)
Hi Z
TON- DLY -F
50%
(OFF)
Hi Z
50%
90%
V_OUTB
TON-DLY - F
(OFF)
10%
Hi Z
(OFF)
Hi Z
TON- DLY -R
THIZ_GND
Figure 1: AAT4901-4 Timing Diagram.
THIZ_IN
8
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4901.2008.03.1.0