Automotive 3-Phase BLDC Controller
and MOSFET Driver
A3930 and
A3931
5
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Continued on the next page…
Turn-Off Propagation Delay t
p(off)
From Hall input change to unloaded
gate output change
300 500 700 ns
From other control input change to
unloaded gate output change
– 150 200 ns
Dead Time (turn-off to turn-on delay) t
DEAD
R
DEAD
= 5 k – 180 – ns
R
DEAD
= 50 k 835 960 1090 ns
R
DEAD
= 400 k – 3.3 – s
RDEAD = tied to V5 – 6 – s
Logic Inputs and Outputs
FFx Fault Output (Open Drain) V
OL
I
OL
= 1 mA, fault asserted – – 0.4 V
FFx Fault Output Leakage Current
2
I
OH
V
O
= 5 V, fault not asserted –1 – 1 A
TACHO and DIRO Output High Voltage V
OH
I
OH
= –1 mA V
5
– 1 V – – V
TACHO and DIRO Output Low Voltage V
OL
I
OL
= 1 mA – – 0.4 V
Input Low Voltage V
IL
– – 0.8 V
Input High Voltage (Except RESET) V
IH
2––V
RESET Input High Voltage V
IHR
2.2 – – V
Input Hysteresis V
IHys
300 500 – mV
Input Current (Except H1, H2, H3, and
RESET)
2
I
IN
–1 – 1 A
RESET Input Pull-Down Resistor R
PD
V
IN
= 5 V – 50 – k
Hx Input Pull-Up Resistor R
PU
V
IN
= 0 V – 100 – k
Current Sense Differential Amplifier
Input Bias Current
2
I
IBS
CSP = CSN = 0 V –250 –200 –150 A
Input Offset Current
2
I
IOS
CSP = CSN = 0 V –10 – 10 A
CSP Input Resistance R
CSP
Measured with respect to AGND – 80 – k
CSN Input Resistance R
CSN
Measured with respect to AGND – 4 – k
Differential Input Voltage V
ID
V
ID
= CSP – CSN, –1.3 V < CSP < 4 V,
–1.3 V < CSN < 4 V
0 – 200 mV
Output Offset Voltage V
OOS
CSP = CSN = 0 V 100 320 550 mV
Output Offset Voltage Drift V
OOS(t)
CSP = CSN = 0 V – 100 – V/°C
Input Common Mode Range V
CM
CSP = CSN –1.5 – 4 V
Differential Input Voltage Gain A
V
40 mV < V
ID
< 175 mV, V
CM
in range 18.5 19 19.5 V/V
Low Output Voltage Error V
err
0 < V
ID
< 40 mV,
V
CSOUT
= (19 × V
ID
) + V
OOS
+ V
err
–20 – 20 mV
DC Common Mode Gain A
CMdc
CSP = CSN = 200 mV – –30 – dB
Source Resistance r
CSOUT
V
CSOUT
= 2 V, –2 mA < I
CSOUT
< 0.5 mA – 80 –
Output Dynamic Range V
CSOUT
–100 A < I
CSOUT
< 100 A 0.1 –
V
5
– 0.2
V
Output Current – Sink I
CSOUT(sink)
V
CSOUT
= 2 V ±5% – 1 – mA
Output Current – Source
2
I
CSOUT(source)
V
CSOUT
= 2 V ±5% – –19 – mA
ELECTRICAL CHARACTERISTICS (continued) at T
J
= –40°C to 150°C, V
BB
= 7 to 45 V, unless otherwise noted
1
Characteristics Symbol Test Conditions Min. Typ. Max. Units