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4.9 LA6579H-X (IC1681) : 4-Channel bridge driver
• Pin layout & Block diagram
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1
2
3
4
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9
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14
FR
FR
VIN1
VIN1-B
VIN1+B
S-GND
VIN1-S
W
MUTE
VREFIN
VCCS
3.3VREG
REGIN
VIN2G
VIN2
VIN3G
VIN3
FR
VIN1-A
VIN1+A
VCCP1
VO+
VO-
VO2+
VO2-
VO3+
VO3-
VO4+
VO4-
VCCP2
VIN4
VIN4G
FR
+
-
+
-
+
-
[H]
[L]
VIN1_SW
[H]: OP-AMP_A
[L]: OP-AMP_B
33k
11k
Signal system
power supply
All outputs ON/OFF
H : ON
L : OFF
MUTE
Level shift
Level shift
Power system GND
Signal system
power supply
3.3VREG
(External:PTP Tr)
+
-
Power system
GND
Level shift
Level shift
+
-
33k
11k
+
-
+
-
+
-
11k
33k
33k
11k