LV8098CS

Ordering number : ENA1515 Bi-CMOS IC LV8098CS Overview For VCMs Constant-current Driver IC The LV8098CS is a constant current driver IC for voice coil motors that supports I2C control integrating a digital/analog converter (DAC). It uses an ultraminiature WLP package and includes a current detection resistor for constant current control, which makes the IC ideal for miniaturization of camera modules intended for use in camera-equipped mobile phones. The output transistor has a low on-resistance of 1Ω and the resistance of the built-in current detection resistor is 1Ω, which minimizes the voltage loss and helps withstand voltage drop in VCC. The current consumption when the DAC is set to code 0 is 0 (ICC ≈ 0, IOUT ≈ 0) allowing reduction in current consumption. Functions • Constant current driver for voice coil motors. • Constant current control enabled by DAC (8 bits). 2 • I C bus control supported. • Wide operating voltage range (2.2 to 5.0V). • The current consumption is 0 when the DAC is set to code 0. • 6-pin WLP package used (1.27 × 0.87 × 0.5mm). • Built-in thermal protection circuit. • Built-in voltage drop protection circuit (VCC = 2V output off). • Low output block total-resistance of 2Ω helps withstand voltage drop in VCC. (Current detection resistance + output transistor on-resistance). • Built-in current detection resistor. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output voltage Input voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VOUT max VIN max Pd max Topr Tstg SCL, SDA, ENA With specified substrate * Conditions Ratings 5.5 VCC + 0.5 5.5 350 -30 to +85 -40 to +150 Unit V V V mW °C °C * Specified substrate : 40mm × 40mm × 1.6mm, Single layer glass epoxy substrate Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer' s products or equipment. 72909 SY PC 20090626-S00003 No.A1515-1/8 LV8098CS Allowable Operating Conditions at Ta = 25°C Parameter Supply voltage Maximum preset output current High-level input voltage Low-level input voltage Symbol VCC IO VIH VIL Applied to SCL, SDA, and ENA pins Conditions Ratings 2.2 to 5.0 100 1.3 to VCC -0.3 to 0.5 Unit V mA V V Electrical Characteristics at Ta = 25°C, VCC = 2.8V Parameter Supply current Symbol ICCOa ICCOb ICCOc ICC1 Input current Total resistance value of the output block (built-in resistor + transistor on-resistance) DAC block Resolution Relative accuracy Differential linearity Full code current Error code current 0 Spark killer diode Reverse current Forward voltage IS (leak) VSF 1 1.3 μA V INL DNL Ifull Izero D0 to D7 = 1 D0 to D7 = 0 100 1 8 ±1 ±1 bits LSB LSB mA μA IIN RTTL ENA = L ENA = H, PD = 1 ENA = H, D0 to D7 = 0 ENA = H, D0 to D7 ≠ 0 SCL, SDA, ENA VCC = 2.8V, IOUT = 80mA -1 0.5 0 2 Conditions min Ratings typ max 1 1 1 3 1 3 μA μA μA mA μA Ω Unit Package Dimensions unit : mm (typ) 3380 0.4 Pd max -- Ta Specified board : 40 × 40 × 1.6mm3 Single layer glass epoxy TOP VIEW 0.87 SIDE VIEW BOTTOM VIEW Allowable power dissipation, Pd max -- W 0.35 0.3 1.27 3 0.24 0.4 0.2 0.18 LASER MARKED INDEX SIDE VIEW 0.2 0.4 B A 0.24 1 2 0.1 0.5 MAX 0 --30 --20 0 20 40 60 80 100 120 0.12 Ambient temperature, Ta -- °C SANYO : WLP6(1.27X0.87) No.A1515-2/8 LV8098CS Pin Assignment Bottom View ( Ball side up ) 3 0.4 2 1 Pin No. A1 A2 A3 B1 A Pin Name SCL ENA GND SDA VCC OUT Pin Description I2C SCL input pin Enable & reset *1, 2 Ground I2C SDA input pin Power supply pin Output pin B2 B3 0.4 0.87 B 1.27 *1 : Setting the ENA pin to low powers down and resets the IC. It is necessary to power on the IC by setting the ENA pin to low and hold it high during normal operation. *2 : When the ENA pin is to be used with pull_up, it is necessary to send code 0 in advance after power-on. Block Diagram VCC 0.1μF VCM ENA Bias Reference voltage Voltage drop protection & thermal protection SDA C P U SCL I2C IF I 2C DECODE OUT DAC 8 bits current setting + - RF 1Ω GND No.A1515-3/8 LV8098CS Pin Description Pin No. A1 A2 Pin name SCL ENA SCL I2C serial clock input pin ENABLE When low, standby mode and reset is performed at the same time. This pin is held high for normal use. Input high level : 1.3V to 5.0V Input low level : -0.3V to 0.5V A1 A2 Description Equivalent circuit VDD GND A3 B3 GND OUT Ground pin. OUT Output pin This is an NMOS open drain output, and the voice coil motor is connected between this pin and the VCC pin for use. VCC B3 1Ω B2 VCC SDA VCC Power supply input pin SDA I2C serial data input pin Input high level : 1.3V to 5.0V Input low level : -0.3V to 0.5V B1 B1 VDD GND No.A1515-4/8 LV8098CS Serial Bus Communication Specifications I2C serial transfer timing conditions Standard mode twH SCL twL th2 SDA th1 ts2 ts1 ts3 th1 tbuf Start condition ton tof Resend start condition Stop condition Input waveform condition Standard mode Parameter SCL clock frequency Data setup time symbol fscl ts1 ts2 ts3 Data hold time th1 th2 Pulse width twL twH Input waveform conditions ton tof Bus free time tbuf SCL clock frequency Setup time of SCL with respect to the falling edge of SDA Setup time of SDA with respect to the rising edge of SCL Setup time of SCL with respect to the rising edge of SDA Hold time of SCL with respect to the rising edge of SDA Hold time of SDA with respect to the falling edge of SCL SCL low period pulse width SCL high period pulse width SCL, SDA (input) rising time SCL, SDA (input) falling time Interval between stop condition and start condition 4.7 Conditions min 0 4.7 250 4.0 4.0 0 4.7 4.0 1000 300 typ max 100 unit kHz μs ns μs μs μs μs μs ns ns μs High-speed mode Parameter SCL clock frequency Data setup time Symbol fscl ts1 ts2 ts3 Data hold time th1 th2 Pulse width twL twH Input waveform conditions ton tof Bus free time tbuf SCL clock frequency Setup time of SCL with respect to the falling edge of SDA Setup time of SDA with respect to the rising edge of SCL Setup time of SCL with respect to the rising edge of SDA Hold time of SCL with respect to the rising edge of SDA Hold time of SDA with respect to the falling edge of SCL SCL low period pulse width SCL high period pulse width SCL, SDA (input) rising time SCL, SDA (input) falling time Interval between stop condition and start condition 1.3 Conditions min 0 0.6 100 0.6 0.6 0 1.3 0.6 300 300 typ max 400 unit kHz μs ns μs μs μs μs μs ns ns μs No.A1515-5/8 LV8098CS I C bus transmission method Start and stop conditions The I2C bus requires that the state of SDA be preserved while SCL is high as shown in the timing diagram below during a data transfer operation. SCL 2 SDA ts2 th2 When data is not being transferred, both SCL and SDA are in the high state. The start condition is generated and access is started when SDA is changed from high to low while SCL and SDA are high. Conversely, the stop condition is generated and access is ended when SDA is changed from low to high while SCL is high. Start condition Stop condition SCL SDA th1 th3 Data transfer and acknowledgement response After the start condition has been generated, the data is transferred one byte (8 bits) at a time. Generally, in an I2C bus, a unique 7-bit slave address is assigned to each device, and the first byte of the transfer data is allocated to the 7-bit slave address and to the command (R/W) indicating the transfer direction of the subsequent data. However, this IC is provided with only a write mode for receiving the data. Every time 8 bits of data for each byte are transferred, the ACK signal is sent from the receiving end to the sending end. Immediately after the clock pulse of SCL bit 8 in the data transferred has fallen to low, SDA at the sending end is released, and SDA is set to low at the receiving end, causing the ACK signal to be sent. When, after the receiving end has sent the ACK signal, the transfer of the next byte remains in the receiving status, the receiving end releases SDA at the falling edge of the ninth SCL clock. Start M S B Slave address L S B W A C K M S B Data L S B A C K M S B Data L S B A C K Stop SCL 1st byte SDA (WRITE) A1 A2 A3 A4 A5 A6 A7 0 2nd byte PD X D7 D6 D5 D4 D3 D2 X : DON'T CARE 3ed byte D1 D0 X X X X X X No.A1515-6/8 LV8098CS The standard data transfer to this device consists of three bytes : the slave address of the first byte and the data of the second and third bytes. Slave address : 0110011(0) PD : Power-down D1-D7 : 8-bit data used to set output constant current ; MIN = 00000000, MAX = 11111111 The table below shows the format of the second and third bytes. 2nd byte Serial data bits Function SD7 PD SD6 × SD5 D7 SD4 D6 SD3 D5 SD2 D4 SD1 D3 SD0 D2 SD7 D1 SD6 D0 SD5 × 3rd byte SD4 × SD3 × SD2 × SD1 × SD0 × PD bit setting method PD = 1 → Power_down (standby mode) and reset D0-D7 setting method Current setting code 0 1 2 D7 0 0 0 D6 0 0 0 D5 0 0 0 D4 0 0 0 D3 0 0 0 D2 0 0 1 D1 0 1 0 Output setting (LSB) 0 1 2 Output current (mA) (design value) 0 0.392 0.784 254 255 1 1 1 1 1 1 1 1 1 1 1 1 0 1 254 255 99.608 100 Relationship between the ENA pin input, I2C input data PD, and current setting 0 (code 0) This IC supports the following three modes of setting up the standby mode : 1) Setting the ENA pin low. 2) Setting the PD bit to 1 (high) with I2C input data. 3) Setting the output current to 0 with I2C input data. Execution of one of the steps 1) to 3) causes the output current to 0 and stops operation of the circuit. When the ENA pin is set low, the I2C data register is reset and the IC is reset to its default state (PD bit set to 0 and output current setting to code 0). Since the IC starts operation in the data reset state at power-on time, it is necessary to start using the IC in the default state by setting the ENA pin low before turning on VCC and then high after VCC is established. No.A1515-7/8 LV8098CS SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of July, 2009. Specifications and information herein are subject t o change without notice. PS No.A1515-8/8