TMC603A Datasheet, PDF (37/44 Pages) TRINAMIC Motion Control GmbH & Co. KG. – Three phase motor driver with BLDC back EMF commutation hallFX™ and current sensing

TMC603A DATA SHEET (V. 1.15 / 2009-Nov-19)
37
Current measurement block
Parameter
DC-Characteristics, Timing-Characteristics
V_VM = 24 V, V_VCC = 5.0 V
Symbol Conditions
Min
Typ
Amplification of voltage
V_FILTXRSX (or V_BMX) to V_CURX
Zero current level at CURX
A_CURLO+
A_CURHI+
V_0CURX
SENSE_HI = GND
SENSE_HI = VCC
-4.72
-20.4
V_VCC/3
-50mV
-4.82
-20.8
V_VCC/3
-11mV
Measurement voltage range at
V_BMX
V_BMX
SENSE_HI = GND
SENSE_HI = VCC
-300
-70
V_CURX output voltage swing low
V_CURX output voltage swing high
Ripple voltage / hold step noise
at output
note 2)
V_CURX
V_CURX
V_CURX
V_BMX = 0V
SENSE_HI = GND
V_BMX = 0V
SENSE_HI = VCC
0.02
V_VCC-1.2 V_VCC-0.6
17
50
Minimum low side on time for
t_BLHICURX SAMPLEx = VCC
3.5
5.3
current measurement
(Delay from BLx going active to
CURx tracking amplified signal)
Delay from SAMPLEx going
active to CURx tracking
amplified signal
t_SMPHICURX SAMPLEx = VCC
t_BLHICURX
/2
Delay from BLx or SAMPLEx
t_BLXLO
0
going inactive to CURx hold
Sample and hold drop during
hold period
dV_CURX
0.001
Auto zero drop of current
amplifier during sampling period
(low side on)
dV_CURX
0.003
Minimum initial auto zero period t_BLXLO0
5
(low side off or SAMPLEx low)
after power on
t_SMPXLO0
Minimum refreshing time for auto t_SMPXLO
1
zero during continuous
measurement, e.g. each 10ms
Minimum sample period after
t_BLHICURX for a 100% current step
Output current limit at CURx
t_BLXHIADD
I_CURX Current sourcing
1
0.45
Max
-4.92
-21.2
V_VCC/3
+30mV
300
70
0.1
26
75
7.2
1.6
3
Unit
V/V
V/V
V
mV
mV
V
V
mV
mV
µs
µs
µs
V/s
V/s
µs
µs
µs
mA
2) Note on first ICs TMC603 rather than TMC603A:
CURx outputs are sensible to ripple voltage on VCC pin and frequency below 5MHz. Ripple voltage is amplified by 1/3 * Set
amplification, i.e. factor 1.5 with SENSE_HI low and factor 6 with SENSE_HI high. Thus, it is suggested to use 5VOUT only for
VCC supply, if possible, if exact measurements are required. This is corrected for TMC603A, ripple does not become amplified.
Copyright © 2009 TRINAMIC Motion Control GmbH & Co. KG