The MIC4609 features a 300 ns typical input filtering
time to prevent unwanted pulses and a 550 ns of
propagation delay. The MIC4609 has TTL input
thresholds.
The robust operation of the MIC4609 ensures that the
outputs are not affected by supply glitches, High Side
(HS) ringing below ground, or HS slewing with
high-speed
voltage
transitions.
Undervoltage
protection is provided on both the low-side and
high-side drivers.
The MIC4609 is available in a 28-pin wide SOIC
package. The MIC4609 has an operating junction
temperature range of –40°C to +125°C.
Typical Applications
•
•
•
•
3-Phase Motor Drive
Field-Oriented Control (FOC)
White Goods Appliances
Brushless DC Fans
Package Type
MIC4609
28-Pin SOICW
V
DD
AHI
BHI
CHI
ALI
BLI
CLI
FAULT
ISNS
EN
RCIN
V
SS
COM
CLO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AHB
AHO
AHS
NC
BHB
BHO
BHS
NC
CHB
CHO
CHS
NC
ALO
BLO
2017 Microchip Technology Inc.
DS20005531B-page 1
MIC4609
Functional Block Diagram MIC4609 – Top Level Circuit
V
DD
UVLO
V
DD
V
DD
UVLO
AHB
AHO
Phase A Drive Circuit
UVLO
EN
AHI
Input Filter &
Anti-Shoot-Through
AHI
ALO
ALI
COM
AHS
V
SS
ALI
V
SS
V
DD
UVLO
EN
BHI
Input Filter &
Anti-Shoot-Through
BHI
Phase B Drive Circuit
BHB
BHO
BHS
BLO
BLI
COM
V
SS
BLI
V
SS
V
DD
UVLO
EN
CHI
Input Filter &
Anti-Shoot-Through
CHI
Phase C Drive Circuit
CHB
CHO
CHS
CLO
CLI
COM
V
SS
CLI
V
SS
ISNS
+
-
V
ISNS
I
RCIN
RCIN
+
-
V
RCIN+
V
SS
V
SS
Input
Blanking
COM
UVLO
S
Latch
R
Q
_
Q
COM
FAULT
V
SS
EN
Input
Filter
V
SS
EN
DS20005531B-page 2
2017 Microchip Technology Inc.
MIC4609
Functional Block Diagram MIC4609 – Phase x Drive Circuit
xHB
V
DD
UVLO
UVLO
EN
LEVEL
SHIFT
xHS
DRIVER
xHO
xHI
S
R
xLI
Q
Q
DRIVER
xLO
COM
Note:
The x in the suffix of a pin name designates any of the three phases, e.g., xHS refers to either AHS,
BHS or CHS.
2017 Microchip Technology Inc.
DS20005531B-page 3
Typical Application Circuit MIC4609 – 300V, 3-Phase Motor Driver
V
DD
R3
R2
R1
D3
D2
D1
DS20005531B-page 4
2017 Microchip Technology Inc.
MIC4609
300V
SUPPLY
V
CC
V
DD
FAULT
EN
AHB
AHO
AHS
BHB
Q2
C1
Q4
Q6
AHI
ALI
BHO
BHS
C2
Controller
BHI
BLI
MIC4609
CHB
CHO
CHS
ALO
C3
CHI
CLI
BLO
CLO
ISNS
Q1
Q3
Q5
RCIN
V SS
COM
CDLY
RS
MIC4609
1.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings †
Supply Voltage (V
DD
, V
xHB
– V
xHS
) ........................................................................................................... –0.3V to +25V
Input Voltages (V
xLI
, V
xHI
, V
EN
).................................................................................................................... –0.3V to V
DD
Voltage on LO (V
xLO
) ................................................................................................................................... –0.3V to V
DD
Voltage on HO (V
xHO
) .......................................................................................................................... V
HS
– 0.3V to V
HB
Voltage on HS ............................................................................................................................................. –5V to +630V
Voltage on HB .........................................................................................................................................................+655V
) .................................................................................................................................. +10V to +20V
Voltage on xHS (continuous) ...................................................................................................................... –1V to +600V
Voltage on xHS (repetitive transient)........................................................................................................... –5V to +600V
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