DRV201_15 Datasheet, PDF (5/29 Pages) Texas Instruments – DRV201 Voice Coil Motor Driver for Camera Auto Focus

www.ti.com
DRV201
SLVSB25C – AUGUST 2011 – REVISED JUNE 2015
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)
I_LIMIT
I_DETCODE
PARAMETER
Average VCM current limit
Minimum VCM code for OPEN and
SHORT detection
See ⁽¹⁾
See ⁽²⁾
TEST CONDITIONS
MIN
TYP
MAX UNIT
110
160
240 mA
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
LOGIC I/Os (SDA AND SCL)
When 1/f_VCM compensation is used
When 2/f_VCM compensation is used
–10%
–30%
10%
30%
I_IN
Input leakage current
R_PullUp
I²C pull-up resistors
V_IH
Input high level
V_IL
Input low level
t_TIMEOUT SCL timeout for shutdown detection
R_PD
Pull down resistor at SCL line
f_SCL
I²C clock frequency
INTERNAL OSCILLATOR
V = 1.8 V, SCL
V = 1.8 V, SDA
SDA and SCL pins
See ⁽⁴⁾
See ⁽⁵⁾
–4.25
–1
1.17
0
0.5
4.25
µA
1
4.7
kΩ
3.6 V
0.63 V
1 ms
500
kΩ
400 kHz
f_OSC
Internal oscillator
Frequency accuracy
THERMAL SHUTDOWN
20°C ≤ T_A ≤ 70°C
-40°C ≤ T_A ≤ 85°C
–3%
3%
–5%
5%
T_TRIP
Thermal shutdown trip point
140
°C
(1) During short circuit condition driver current limit comparator will trip and short is detected and driver goes into STANDBY and short flag
is set high in the status register.
(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. For example, 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) During shutdown to standby transition V_IH low limit is 1.28 V.
(5) During shutdown to standby transition V_IL high limit is 0.51 V.
Copyright © 2011–2015, Texas Instruments Incorporated
Product Folder Links: DRV201
Submit Documentation Feedback
5