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SI9979CS-E3

P1-P3P4-P6P7-P9P10-P11
Si9979
Vishay Siliconix
Document Number: 70012
S-41209—Rev. E, 21-Jun-04
www.vishay.com
1
3-Phase Brushless DC Motor Controller
FEATURES
D Hall-Effect Commutation
D 60_ or 120_ Sensor Spacing
D Integral High-Side Drive for all N-Channel MOSFET
Bridges
D PWM Input
D Quadrature Selection
D Tachometer Output
D Reversible
D Braking
D Output Enable Control
D Cross Conduction Protection
D Current Limiting
D Undervoltage Lockout
D Internal Pull-Up Resistors
DESCRIPTION
The Si9979 is a monolithic brushless dc motor controller with
integral high-side drive circuitry. The Si9979 is configured to
allow either 60_or 120_ commutation sensor spacing. The
internal low-voltage regulator allows operation over a wide
input voltage range, 20- to 40-V dc.
The Si9979 provides commutation from Hall-effect sensors.
The integral high-side drive, which utilizes combination
bootstrap/charge pump supplies, allows implementation of an
all n-channel MOSFET 3-phase bridge. PWM, direction,
quadrature select, and braking inputs are included for control
along with a tachometer output. Protection features include
cross conduction protection, current limiting, and undervoltage
lockout. The FAULT
output indicates when undervoltage, over
current, disable, or invalid sensor shutdown has occurred.
The Si9979 is available in both standard and lead (Pb)-free
48-pin SQFP packages and is specified to operate over the
commercial temperature range of 0 to 70_C (C suffix), and the
industrial temperature range of −40 to 85_C (D suffix).
FUNCTIONAL BLOCK DIAGRAM
IN
A
IN
C
BRK
PWM
TACH
QS
V+
GT
A
F/R
EN
V
DD
R
T
V
DD
Input
Logic
V
DD
V
REF
V
REF
V
REF
V
DD
V
REF
CAP
A
CAP
B
Low-Side
U.V. Lockout
V
REF
−
+
I
S
−
I
S
+
R
T
/C
T
42
43
2
4
5
6
10
9
11
8
18
17
34
20
19
Low-Voltage
Regulator
High-Side
U.V. Lockout
Bootstrap Reg.
Charge Pump
S
A
35
GT
B
30
Bootstrap Reg.
Charge Pump
S
B
31
CAP
A
36
CAP
B
32
GB
A
33
GB
B
29
V
DD
13-16, 21-24
GND
CAP
C
GT
C
26
Bootstrap Reg.
Charge Pump
S
C
27
CAP
C
28
GB
C
25
One Shot
37-41, 44-48
FAULT
7
IN
B
V
DD
3
60/120
V
DD
1
V
REF
Si9979
Vishay Siliconix
www.vishay.com
2
Document Number: 70012
S-41209—Rev. E, 21-Jun-04
ABSOLUTE MAXIMUM RATINGS
Voltage on Pin 42 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage on Pins 1−4, 10, 11 −0.3 V to V
DD
+ 0.3 V. . . . . . . . . . . . . . . . . . . . .
Voltage on Pins 5−9 −0.3 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage on Pins 26, 28, 30, 32, 34, 36 60 V. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage on Pins 27, 31, 35 −2 to 50 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature
C Suffix 0 to 70_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Suffix −40 to 85_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature −65 to 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Junction Temperature (T
J
) 150_C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (P
D
)
C Suffix 0.70 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D Suffix 0.55 W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RECOMMENDED OPERATING RANGE
V+ +20 to 40 V
DC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R
T
10 kW Min. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SPECIFICATIONS
Test Conditions
Unless Otherwise Specified
Limits
Parameter Symbol
Unless Other
w
ise Specified
V+ = 20 to 40 V, I
DD
= 0 mA
Min
a
Typ
b
Max
a
Unit
Power
Supply Voltage Range V+ 20 40
V
Logic Voltage V
DD
−20 mA v I
DD
v 0 mA 14.5 16 17.5
V
Supply Current I+ 4.5
mA
Logic Current I
DD
−20
mA
Internal Reference
d
V
REF
4.2 V
Commutation Inputs (IN
A
, IN
B
, IN
C
, 60/120)
High-State V
IH
4.0
V
Low-State V
IL
1.0
V
High-State Input Current I
IH
V
IH
= V
DD
10
mA
Low-State Input Current I
IL
V
IL
= 0 V −50
mA
Logic Inputs (F/R, EN, QS, PWM, BRK)
High-State V
IH
2.0
V
Low-State V
IL
0.8
V
High-State Input Current I
IH
V
IH
= 5.5 V 10
mA
Low-State Input Current I
IL
V
IL
= 0 V −125
mA
Outputs
Low-Side Gate Drive, High State V
GBH
14 16 17.5
Low-Side Gate Drive, Low State V
GBL
0.1
High Side Gate Drive High State
V
GTH
T
A
= 0 to 70_C C Suffix 16 18
V
High-Side Gate Drive, High State V
GTH
T
A
= −40 to 85_C D Suffix 16 20
V
High-Side Gate Drive, Low State V
GTL
0.1
Capacitor Voltage
d
V
CAP
V+ = 40 V 55
Low-Side Switching, Rise Time t
rL
70
Low-Side Switching, Fall Time t
fL
Risetime = 1 to 10 V
Falltime = 10 to 1 V
25
High-Side Switching, Rise Time t
rH
Falltime = 10 to 1 V
C
L
= 600 pF
100
ns
High-Side Switching, Fall Time t
fH
C
L
= 600 pF
40
ns
Break Before Make Time
t
BLH
100
Break-Before-Make Time
t
BHL
300
TACH Output/FAULT Output V
OL
I
OL
= 1.0 mA 0.15 0.4 V
TACH Output Pulsewidth t
T
300 600 ns
Si9979
Vishay Siliconix
Document Number: 70012
S-41209—Rev. E, 21-Jun-04
www.vishay.com
3
SPECIFICATIONS
Limits
Test Conditions
Unless Otherwise Specified
V+ = 20 to 40 V, I
DD
= 0 mA
Parameter UnitMax
a
Typ
b
Min
a
Test Conditions
Unless Otherwise Specified
V+ = 20 to 40 V, I
DD
= 0 mA
Symbol
Protection
Low-Side Undervoltage Lockout UVLL 12.2
Low-Side Hysteresis V
H
0.8
V
High-Side Undervoltage Lockout UVLH S
A,
B,
C
= 0 V V
DD
− 3.3
Current Limit
Comparator Input Bias Current I
IB
−5 mA
Comparator Threshold Voltage
V
TH
T
A
= 0 to 70_C C Suffix 90 100 110
mV
Comparator Threshold Voltage V
TH
T
A
= −40 to 85_C D Suffix 85 100 125
mV
Common Mode Voltage V
CM
0 1 V
One Shot Pulse Width
t
R
T
= 10 k, C
T
= 0.001 mF 8 10 12
ms
One Shot Pulse Width t
p
R
T
= 10 k, C
T
= 0.01 mF 80 100 120
ms
Notes
a. The algebraic convention whereby the most negative value is a minimum and the most positive a maximum.
b. Typical values are for DESIGN AID ONLY, not guaranteed nor subject to production testing.
c. The reference voltage is not available for external use.
d. V
CAP
= (V+) + (V
DD
).
COMMUTATION TRUTH TABLE
Inputs Outputs Conditions
Sensors
(60_Spacing)
Sensors
(120_Spacing)
Top Drive Bottom Drive
IN
A
IN
B
IN
C
IN
A
IN
B
IN
C
EN F/R
BR
K
I
S
+
GT-
A
GT-
B
GT-
C
GB
A
GB
B
GB
C
FAULT
0 0 0 1 0 1 1 1 0 0 1 0 0 0 1 0 1
1 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 1
1 1 0 1 1 0 1 1 0 0 0 1 0 0 0 1 1
1 1 1 0 1 0 1 1 0 0 0 1 0 1 0 0 1
0 1 1 0 1 1 1 1 0 0 0 0 1 1 0 0 1
0 0 1 0 0 1 1 1 0 0 0 0 1 0 1 0 1
0 0 0 1 0 1 1 0 0 0 0 1 0 1 0 0 1
1 0 0 1 0 0 1 0 0 0 0 0 1 1 0 0 1
1 1 0 1 1 0 1 0 0 0 0 0 1 0 1 0 1
1 1 1 0 1 0 1 0 0 0 1 0 0 0 1 0 1
0 1 1 0 1 1 1 0 0 0 1 0 0 0 0 1 1
0 0 1 0 0 1 1 0 0 0 0 1 0 0 0 1 1
X X X X X X 0 X 0 X 0 0 0 0 0 0 0 Disable
X X X X X X 0 X 1 X 0 0 0 1 1 1 0 Power Down
L L L L L L 1 X 1 0 0 0 0 1 1 1 1 Brake
L L L L L L 1 X 1 1 0 0 0 1 1 1 0 Over I in BRK
L L L L L L 1 X 0 1 0 0 0 0 0 0 0 Over I
1 0 1 1 1 1 1 X 0 X 0 0 0 0 0 0 0
1 0 1 1 1 1 1 X 1 X 0 0 0 1 1 1 0
0 1 0 0 0 0 1 X 0 X 0 0 0 0 0 0 0
0 1 0 0 0 0 1 X 1 X 0 0 0 1 1 1 0
Notes: L. Any valid sensor combination
X. Don’t care
P1-P3P4-P6P7-P9P10-P11

SI9979CS-E3

Mfr. #:
Buy SI9979CS-E3
Manufacturer:
Vishay / Siliconix
Description:
Motor / Motion / Ignition Controllers & Drivers DC Motor Controller
Lifecycle:
New from this manufacturer.
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