DW9718S
- High efficiency driver IC for VCM
Ver. 1.7.1
CONTENTS
1.G ENERAL D ESCRIPTION (1)
2.B LOCK D IAGRAM (1)
3.P IN I NFORMATION (2)
4.A BSOLUTE M AXIMUM R ATINGS (3)
5.R ECOMMENDED O PERATING C ONDITION (3)
6.E LECTRICAL S PECIFICATIONS (4)
7.P OWER ON&R ESET SEQUENCE (5)
7.1.Power ON (5)
7.2.PD(Power Down) sequence (5)
7.3.Hardware Reset (6)
8.M ODE CHANGE (6)
9.R EGISTER (7)
9.1.I2C format (7)
9.2.Register table (7)
9.3.Register description (8)
10.S LEW R ATE C ONTROL S ET UP M ETHOD (11)
10.1.Direct & LSC(Linear Slope Control) scheme (11)
10.2.SAC(Smart Actuator Control) scheme (11)火药
爆炸 11.I2C P ROTOCOL (12)
11.1.Start and Stop condition (12)
11.2.Complete I2C Data Transfer (12)
11.3.I2C timing (13)
12.T YPICAL A PPLICATION C IRCUIT (14)
13.P ACKAGE D IMENSION (6WLCSP,0.73MM X1.13MM X0.3 MM) (15)
1. General Description
The DW9718S has a single 10-bit DAC with 100mA output current sinking capability, which is designed for linear control of voice coil motors, capable of operating voltage up to 4.8V. The SAC(Smart Actuator Control) mode is applied to minimize mechanical vibrations automatically. The SAC mode highly improves the actuator’s settling time and tolerance coverage compared with conventional LSC(Linear Slope Control) mode. The DW9718S is controlled via an I2C serial interface, the clock rates of which is up to 400 kHz.
The DW9718S has a POR(Power On Reset) circuit and power down mode. POR circuit gets to operate when VDD(supply power) turns on. The output current keeps 0mA until valid register value takes place. During the power down mode, it consumes max. 1uA.
The DW9718S is designed for auto focus and optical zoom for mobile cameras, digital still cameras, camcorders and other nano actuator applications.
■Features
VCM driver for auto-focus
High efficiency switching mode operation
10bit resolution current sinking of 100mA for VCM
SAC(Smart Actuator Control) mode, LSC(Linear Slope Control) mode
Supply voltage range(VDD): 2.3V to 4.8V(Linear Mode)
Fast mode I2C interface(1.8V interface available)
Power down mode
Power on reset(POR)
UVLO(Under Voltage Lockout), OCP(Over Current Protection)
Package: 6 pin WLCSP(0.73 X 1.13 X 0.31(mm))
铬酸盐钝化■Applications
Mobile camera
Digital still camera
Camcorder
Web camera
Nano actuator
2. Block Diagram
VDD
IOUT
VSS
SENSE
3. Pin Information
■ Pin assignment and dimension
Bottom View
Top View
IC size : 0.73(W) X 1.13(L) X 0.31(T)mm
Pin pitch = 0.4mm(6 pin WLCSP)
SDA SENSE VSS IOUT SCL VDD SDA
SENSE
韦伯VSS
IOUT SCL VDD
■ Pin Description
4. Absolute Maximum Ratings
■Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range (Topr) may result in IC damage. The implementation of a physical safety measures such as a fuse should be considered when you use the IC in a special mode in which you anticipate the absolute maximum ratings may be exceeded.
5. Recommended Operating Condition
6. Electrical Specifications
(VDD=2. 8V, Vin=1.8V to VDD, Ta= 25℃, unless otherwise specified.)
碳化钨(1) These are guaranteed by design spec. and characterization.
(2) Test condition is 1Mhz at free-air temperature.
河南化肥厂爆炸(3) Linearity is guaranteed for code 32 through code 992.
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