DRV3202-Q1_15 Datasheet, PDF (21/39 Pages) Texas Instruments – 3-Phase Brushless Motor Driver

DRV3202-Q1
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PHASE COMPARATOR
SLVSBJ4A – OCTOBER 2012 – REVISED DECEMBER 2012
Description
A 3-channel comparator module monitors the external FET by detecting voltage across the drain-source for high-
side and low-side FETs. PHTM is the threshold level of comparators usable for sensorless communication.
Figure 16 shows an example of the threshold level. There is no detection when CTLEN = Low.
UHS,
VHS,
WHS
CTLEN
VCOM
PHxM
PHTM
Clamp
Clamp
V_CC
+
-
PMVx
Figure 16. Phase Comparator Block Diagram
PHASE COMPARATORS ELECTRICAL CHARACTERISTICS
VB = 12 V, T_A = –40°C to 125°C (unless otherwise specified)
PARAMETER
CONDITIONS
PHASE COMPARATOR
V_iofs
V_inp
V_inm
V_ihys
V_OH
V_OL
T_{res_tr} ⁽¹⁾
T_{res_tf} ⁽¹⁾
Input offset voltage
Input voltage range (PHTM)
Input voltage range (PHxM)
Input hysteresis voltage
Output high voltage
Output low voltage
Response time (rising)
Response time (falling)
VB = 5.3 ~18 V
I_sink = 2.5 mA
I_source = 2.5 mA
C_L = 100 pF
C_L = 100 pF
(1) Specified by design
MIN TYP
MAX UNITS
–15
1.325
–1
100
0.9 × V_CC
–
–
–
–
15 mV
–
4.5 V
–
VB V
200
400 mV
–
–V
– 0.1 × V_CC
V
0.2
0.5 µs
0.4
1 µs
Copyright © 2012, Texas Instruments Incorporated
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