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?W@^?I? 9 ? 7 ? 1 silicon touch technology inc . 9-7f-1, prosperity road i, science based industrial park, hsin-chu, taiwan 300, r.o.c. tel 886-3-5645656 fax 886-3-5645626 VM147 version : a.001 issue date : 2010/06/08 file name : sp-VM147-a.001.doc total pages : 13 110ma, 10bit current sinking vcm driver with i 2 c interface
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page1 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 VM147 110ma, 10-bit current sinking vcm driver with i 2 c interface general specifications the VM147 is a vcm(voice coil motor) driver ic with i 2 c interface control that is capable of programmable sinking output current. it has a built-in in ternal voltage reference and operates with a supply voltage range from 2.4v to 5.5v. the dac is controlled by a signal transmit through a 2-wire i 2 c serial interface which operates in an i 2 c fast mode (400 khz). the VM147 is designed for applications such as image stabilization, auto-focus, optical zoom in camera phones, and other portable module devices. features and benefits z programmable sinkin g output current z i 2 c serial interface z dac with 10-bit resolution z 2.4v ? 5.5v power source z selective output slew rate control(src) z low voltage control for digi tal pin ps, sda, and scl (i.e., v ih = 1.68v @ vdd = 2.8v) z power saving mode leakage current 2.4ua max. z power saving mode z automatic power on reset z ultra small package: wlcsp (0.78*1.27*0.35mm) ordering information part number package marking VM147 wlcsp wlcsp, 6pin 7xx* *xx reserved for a data code
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page2 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 terminology resolution the dac resolution is defined by the power fa ctor of 2, which def ines the number of distinct digitized levels. n-bit resolution -> 2 n distinct digitized levels differential nonlinearity (dnl) error the variation in digitized step value away from 1 lsb by any two adjacent digitized levels, gain and offset errors removed. integral nonlinearity (inl) inl is a deviation of the actual transfer respon se from a straight line. usually, inl error is referred to the maximum inl error.
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page3 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 pin assignment of wlcsp (0.78*1.27*0.35mm) top view pin number pin name description 1 sink analog output : current sink pin 2 vss ground input pin 3 vdd power input pin 4 sda i 2 c interface data line(serial data line) 5 scl i 2 c interface clock line(serial clock line) 6 ps digital input: power saving control (when ps=high ,chip is disabled) ( when ps=low ,chip is enabled) absolute maximum ratings unless otherwise noted , t a = 25 characteristic symbol rating unit supply voltage v dd -0.4 ~ 5.5 v input signal voltage v in -0.4 ~ v dd +0.4 v maximum sink current i sink 127 ma operating temperature t opr -40 ~ 85 c storage temperature t stg -55 ~ 150 c
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page4 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 electrical characteristic unless otherwise noted , t a = 25 , v dd = 2.8 v and vcm 18 , 460uh. limit item sym. condition min. typ. max. unit power supply supply voltage v dd 2.4 2.8 5.5 v i ps ps = high (chip is disabled) - 0.3 1 ua i dd0 ps = low, sps(*1)= high - 0.3 0.5 ma supply current ( i dd ) i dd1 ps = low, sps(*1)= low - 1.6 2.3 ma ps, sda, scl digital pin input voltage high v ih - 0.5*v dd - v dd +0.4 v input voltage low v il - -0.4 - 0.1*v dd v parameters dac resolution - 10 - bits dnl - +/-0.7 +/-1 lsb inl - +/-1.5 +/-4 lsb maximum output sink current i s,max d[9:0]=3ff(*2) 102 ma zero code output sink current i s,min d[9:0]=000(*2) - 1 4 ma output offset current i os ps = l, sps(*1)= h - 0.1 1 ua voltage drop v mvss sink v v v ? = (*3) (@i sink = 80 ma) - 0.35 0.44 v note: (*1): sps (soft power saving, 2 nd standby mode): ic power saving mode, controlled by software. (*2): the value of sink current throu gh pin sink is set by d[9:0] linearly. (*3): sink v is the voltage of sink pin, and mvss v is the voltage of motor driver vss pin
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page5 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 block diagram (wlcsp)
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page6 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 data format VM147 write mode in the writing mode, data is written to the VM147 and shifted into a 16-bit input register. after all 16 bits of data have been shifted in , a stop signal is generated by master controller. the data in the input register is transferred to the dac at the same time. VM147 read mode in reading mode, data is read from ic to a master controller in the same bit order.
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page7 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 table msb lsb serial data bits 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 input register r15 r14 r13 r12 r11 r10 r09 r08 r07 r06 r05 r04 r03 r02 r01 r00 function sps 0 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 0 s2 s1 s0 z sps (soft power saving, 2 nd standby mode): ic power saving, controlled by software. the operations are defined by the following table. ps sps ic status high - power saving low normal low high soft power saving if ps is at logic high level; the chip is forced to shut down all power. if ps is at logic low level, the chip will be controlled by the sps bit(the r15 bit of the register) to perform normally(sps=low) or to softly power off the ic(sps=high). it is recommended to keep ps at high level (ps = h) while the chip is in no operation mode to save power for all applications. z d[9:0]: the level of sink current thr ough pin sink is set by d[9:0].
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page8 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 z s[2:0]: output current slew rate control: the output current slew rate can be set by s[2:0] as defined below. full scale transition time (ms) s[2:0] min. typ. max. ratio 0 0 0 1.16 1.57 1.99 1x 0 0 1 37.2 50.2 64 32x 0 1 0 55.8 75.3 96 48x 0 1 1 74.3 100 128 64x 1 0 0 92.9 126 159 80x 1 0 1 111 151 191 96x 1 1 0 130 176 223 112x 1 1 1 149 201 255 128x d[9:0]=000 ? 3ff d[9:0]=3ff ? 000
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page9 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 application circuit
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page10 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 application notes z the VM147 is a constant current drivi ng ic for applications in auto-focus. the supply voltage range vdd of VM147 is from 2.4v to 5.5v. the input range of digital control pin ps, and digital i/o pins scl and sda, are defined such that logic ?high? is from 0.6*vdd to vdd+ 0.4v and logic ?low? is from ?0.4v to 0.1*vdd. therefore, the thr ee digital pins are suitable controlled by 1.8v isp. z in order to ensure the stability of output current, a capacitance c l is suggested to be installed between the two terminals of vcm. the suggested value of c l is in the range of 0.1~0.22uf to match different vcms.
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page11 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 package specifications (wlcsp1): (0.78*1.27*0.35mm) dimension (mm) symbol min. nom. max. a 0.325 0.350 0.375 a1 0.090 0.100 0.110 a2 0.235 0.250 0.265 b 0.234 0.260 0.286 d 1.255 1.270 1.285 e 0.765 0.780 0.795 e1 0.380 0.400 0.420 e2 0.380 0.400 0.420 l1 0.215 0.235 0.255 l2 0.170 0.190 0.210
110ma, 10bit current sinking vcm driver with i2c interface version a.001 page12 ??u}u??_??????P? unauthorized reproduction, duplication, use or disclosure of this documen t will be deemed as infringement. VM147 the products listed herein are designed for or dinary electronic applications, such as electrical appliances, audio-visual equi pment, communications devices and so on. hence, it is advisable that the devices should not be us ed in medical instruments, surgical implants, aerospace machi nery, nuclear power control systems, disaster/crime-prevention equipment and t he like. misusing those products may directly or indirectly endanger human lif e, or cause injury and property loss. silicon touch technology, inc. will not take any responsibilities regarding the misusage of the products m entioned above. anyone who purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. silicon touch technology, inc. and its distributors and all their offi cers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such in tention and manipulation. silicon touch technology, inc. reserve the ri ght to make changes to their products or to discontinue any product or service without notice, and advise cu stomers to obtain the latest version of relevant informati on to verify, before placing orders, that information being relied on is current and complete.

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