DRV3203E-Q1 Datasheet, PDF (22/39 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3203E-Q1
SLVSCE5A – NOVEMBER 2013 – REVISED JANUARY 2014
www.ti.com
Phase Comparator
Description:
The three-channel comparator module monitors the external FETs by detecting the drain-source voltage across
the high-side and low-side FETs. PHTM is the threshold level of the comparators usable for sensorless
communication. Figure 14 shows an example of the threshold level.
UHS,
VHS,
WHS
PH1M
VB
PH2M
VCC
PH3M
PHTM
+
Clamp
-
PMV1
PMV2
PMV3
Clamp
Figure 14. Phase Comparator Block Diagram
Table 7. Phase Comparator Electrical Characteristics
PARAMETER
CONDITIONS
VB = 12 V, T_A = –40°C to +150℃ (unless otherwise specified)
PHASE COMPARTOR
V_IOfs
V_Im1
V_Im2
V_Ip
Input offset voltage
Input voltage range, PHTM
Input voltage range, PHTM
Input voltage range, PHxM
VB = 6 V – 26.5 V
VB = 5.3 V
V_hys
Threshold hysteresis voltage
SPI register SPARE. SEL_COMP_HYS
V_OH
Output high voltage
Isink = 2.5 mA
MIN TYP
–15
-
1.3
-
1.3
-
–1
-
-
0
12.5
25
25
50
50
100
0.9 ×
VCC
-
V_OL
Output low voltage
t_{res_tr} ⁽¹⁾
t_{res_tf} ⁽¹⁾
Response time, rising
Response time, falling
(1) Specified by design.
Isource = 2.5 mA
C_L = 100 pF
C_L = 100 pF
-
-
-
0.7
-
0.7
MAX UNITS
15 mV
4.5 V
4.2 V
VB V
-
50 mV
100
200
-V
0.1 ×
VCC
V
1.5 µs
1.5 µs
22
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