DRV201A Datasheet, PDF (4/25 Pages) Texas Instruments – VOICE COIL MOTOR DRIVER FOR CAMERA AUTO FOCUS

DRV201A
SLVSBN6 – JUNE 2013
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over recommended free-air temperature range and over recommended input voltage range (typical at an ambient
temperature range of 25°C) (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
I_DETCODE
Minimum VCM code for OPEN and
SHORT detection
See ⁽²⁾
256
mA
f_SW
Switching frequency
V_DRP
Internal dropout
L_VCM
VCM inductance
R_VCM
VCM resistance
LENS MOVEMENT CONTROL
Selectable through CONTROL register
0.5
See ⁽³⁾
30
11
4 MHz
0.4 V
150 µH
22 Ω
t_set1
Lens settling time
t_set2
Lens settling time
VCM resonance frequency
±10% error band
±10% error band
2/f_VCM
ms
1/f_VCM
ms
50
150 Hz
f_VCM
VCM resonance frequency tolerance
When 1/f_VCM compensation is used
-10
When 2/f_VCM compensation is used
-30
10
%
30
(2) When testing VCM open or short this is the recommended minimum VCM code (in dec) to be used.
(3) This is the voltage that is needed for the feedback resistor and high side driver. It should be noted that the maximum VCM resistance is
limited by this voltage and supply voltage. E.g. 3-V supply maximum VCM resistance is: R_VCM = (V_BAT – V_DRP)/I_VCM = (3 V - 0.4
V)/102.3 mA = 25.4 Ω.
4
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