SI9979 Datasheet, PDF (3/7 Pages) Vishay Siliconix – 3-Phase Brushless DC Motor Controller

Si9979
Vishay Siliconix
SPECIFICATIONS
Parameter
Symbol
Test Conditions
Unless Otherwise Specified
V+ = 20 to 40 V, I_DD = 0 mA
Limits
-40°C to 85°C
Min^a
Typ^b
Max^a
Protection
Low-Side Undervoltage Lockout
UVLL
12.2
Low-Side Hysteresis
High-Side Undervoltage Lockout
Current Limit
V_H
UVLH
S_{A, B, C} = 0 V
0.8
V_DD - 3.3
Comparator Input Bias Current
I_IB
-5
Comparator Threshold Voltage
V_TH
T_A = 0 to 70°C
C Suffix
90
T_A = -40 to 85°C
D Suffix
85
100
110
100
125
Common Mode Voltage
V_CM
0
1
One Shot Pulse Width
t_p
R_T = 10 k, C_T = 0.001 µF
R_T = 10 k, C_T = 0.01 µF
8
10
12
80
100
120
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)
Units
V
µA
mV
V
µs
COMMUTATION TRUTH TABLE
Inputs
Outputs
Sensors
(60°Spacing)
Sensors
(60°Spacing)
Top Drive
Bottom Drive
IN_A IN_B IN_C IN_A IN_B IN_C EN F/R BRK I_S+ GT_A GT_B GT_C GB_A GB_B GB_C FAULT Conditions
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
FaxBack 408-970-5600, request 70012
www.siliconix.com
S-60752-Rev. D, 05-Apr-99
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