DRV3204E-Q1 Datasheet, PDF (21/39 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3204E-Q1
www.ti.com
SLVSCB5A – OCTOBER 2013 – REVISED JANUARY 2013
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 6. Phase Comparator Electrical Characteristics
PARAMETER
CONDITIONS
VB = 12 V, T_A = –40°C to 150℃ (unless otherwise specified)
PHASE COMPARTOR
Viofs
Input offset voltage
Vinm
Input voltage range, PHTM
Vinp
Input voltage range, PHxM
Vhys
Threshold hysteresis voltage
SPI register SPARE. SEL_COMP_HYS
V_OH
Output high voltage
Isink = 2.5 mA
MIN TYP
–15
1.3
–1
0
12.5
25
25
50
50
100
0.9 ×
VCC
V_OL
Output low voltage
Isource = 2.5 mA
t_{res_tr} ⁽¹⁾
Response time, rising
C_L = 100 pF
0.7
t_{res_tf} ⁽¹⁾
Response time, falling
C_L = 100 pF
0.7
(1) Specified by design
MAX UNITS
15 mV
4.5 V
VB V
50 mV
100
200
V
0.1 ×
VCC
V
1.5 µs
1.5 µs
Copyright © 2013, Texas Instruments Incorporated
Product Folder Links: DRV3204E-Q1
Submit Documentation Feedback
21