DRV8809 Datasheet, PDF (10/44 Pages) Texas Instruments – COMBINATION MOTOR DRIVERS WITH DC-DC CONVERTERS

DRV8809
DRV8810
SLVS854A – JULY 2008 – REVISED JULY 2008 ............................................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
T_J = 0°C to 120°C, V_M = 7 V to 40 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
H-Bridge Drivers (OUTx+ and OUTx–)
I_OUT1(max)
I_OUT2(max)
I_OUT(max)
Peak output current 1
Peak output current 2
Average continuous output
current
Less than 500-ns period
Less than 100-ms period
8A
3A
0.8 A
R_ds(ON)
I_CEX
I_RS
I_{OC Motor}
FET ON resistance at 0.8 A
Output leakage current
Sense resistor supply current
Motor overcurrent threshold for
each H-bridge⁽⁶⁾
T_J = 25°C
T_J = 120°C
V_OUTX = 0 V or 10 V
nORT = Low
t_filterM
Motor overcurrent filter time
f_OSCM
Motor oscillator frequency
F_OSCM = (0,0)
f_chop
Motor chopping frequency =
f_OSCM/8
F_OSCM = (0,0)
Stepper Motor Drive (Parameters Are Tested Without Motor Loading)
0.55
3
2.5
5
720 800
90 100
Ω
1
10 µA
15 µA
5A
8.5 µs
880 kHz
110 kHz
I_STEPMOTORAVG
Average stepper motor current
for H-bridge
V_M = 40 V
800
mA
I_{STEPMOTORPeak}
Peak stepper motor current
for H-bridge
V_M = 40 V
1.3
A
I_OUT
Isw_Leakage
Stepper motor current limit
threshold
(internal reference)⁽⁷⁾
Output current accuracy at 100%
setting ⁽⁷⁾
Switch (driver MOSFET) leakage
current
VL₁₆ , Phase angle = 90°
VL₁₅ , Phase angle = 84°
VL₁₄ , Phase angle = 79°
VL₁₃ , Phase angle = 73°
VL₁₂ , Phase angle = 68°
VL₁₁ , Phase angle = 62°
VL₁₀ , Phase angle = 56°
VL₉ , Phase angle = 51°
VL₈ , Phase angle = 45°
VL₇ , Phase angle = 40°
VL₆ , Phase angle = 34°
VL₅ , Phase angle = 28°
VL₄ , Phase angle = 23°
VL₃ , Phase angle = 17°
VL₂ , Phase angle = 11°
VL₁ , Phase angle = 6°
VL₀ , Phase angle = 0°
Excludes VREF and RSENS errors,
I_OUT > 1 A^{(7) (8)}
Outputs off
100
100
98
96
92
88
83
77
71
63
56
47
38
29
20
10
0
–5
–10
%
5%
10 µA
t_ab
Stepper motor blanking time
By OSCi cycles
8
9 cycles
(6) When the overcurrent is detected, all H-bridges are shut down and assert nORT pulse (40 ms).
(7) This is not measured directly, checked by Itrip amplifier gain without motor loading
(8) This device may show current setting error when motor current is less than 1 A, due to noise filter delay at the Itrip comparator.
10
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