8904
3-PHASE BRUSHLESS DC
MOTOR CONTROLLER/DRIVER
ELECTRICAL CHARACTERISTICS continued
Characteristic
CWD Current
Symbol
ICWD
CWD Threshold Voltage
Max. FLL Oscillator Frequency
Oscillator High Duration
Oscillator Low Duration
Maximum Output Current
VTL
VTH
fOSC
ton
toff
IOUT(MAX)
Transconductance Gain
gm
Centertap Resistors
RCT
Back-EMF Threshold with respect
—
to VCTAP at FCOM transition
Test Conditions
Charging, D26 = 0, D27 = 0
Charging, D26 = 0, D27 =1
Charging, D26 = 1 D27 = 0
Charging, D26 = 1, D27 =1
D3 = 0, D4 = 0, D28 = 0
D3 = 0, D4 = 1, D28 = 0
D3 = 1, D4 = 0, D28 = 0
D3 = 1, D4 = 1, D28 = 0
D3 = 0, D4 = 0, D28 = 1
D3 = 0, D4 = 1, D28 = 1
D3 = 1, D4 = 0, D28 = 1
D3 = 1, D4 = 1, D28 = 1
D28 = 1
D28 = 0
Min.
-9.0
-18
-27
-36
0.22
2.25
20*
20
20
1.0
0.9
500
—
500
415
—
—
210
420
5.0
5.0
-5.0
Limits
Typ. Max.
-10 -11
-20 -22
-30 -33
-40 -44
0.25 0.28
2.5 2.75
—
—
—
—
—
—
1.2
1.4
1.0
1.1
600 700
250
—
600 700
500 585
300
—
125
—
250 290
500 580
10
13
20
37
-20 -37
Negative current is defined as coming out of (sourcing) the specified device terminal.
* Operation at an oscillator frequency greater than the specified minimum value is possible but not waranteed.
Units
µA
µA
µA
µA
V
V
MHz
ns
ns
A
A
mA
mA
mA
mA
mA
mA
mA/V
mA/V
kΩ
mV
mV
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