HV892

HV892_14 SUTEX | Alldatasheet

Document overview

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Technical content

Features

► Drives capacitive loads up to 200pF ► Programmable drive amplitude (compatible with 40VRMS to 60VRMS lenses) ► On-chip boost converter ► No external inductor ► I2C interface ► Low operating current (≤20mA) ► Low standby current (≤1.0µA) ► Controlled drive edge reduces EMI ► 10-Lead 4x4mm DFN Package

Applications

► Cell phone cameras ► PDA and ultracompact cameras ► Bar code readers ► Web and laptop cameras Typical Application Circuit Inductorless Liquid Lens Driver General Description The HV892 liquid lens driver is controlled via an I 2C interface, is capable of driving capacitive loads of up to 200pF, and is compatible with 40VRMS to 60VRMS lenses. A single byte (AMP) written to the HV892 controls the operation of the driver. Setting AMP = 01h to FFh controls output amplitude in 255 monotonic steps. Setting AMP = 00h causes the HV892 to go into low power standby mode, consuming less than 1.0µA. When active, the HV892 draws less than 20mA. A charge pump boost converter integrated on-chip provides the high voltage necessary for driving the lens. No external inductors or diodes are needed. Two ceramic chip capacitors are the only external components required for a complete lens driver circuit. An H-bridge output stage provides AC drive to the lens, allowing the use of a single high voltage boost converter while providing alternating polarity to the lens. Controlled rising and falling edges on the drive waveform reduces EMI. The HV892 is offered in a 10-Lead 4x4mm DFN package. VDD SDA SCL GND1 VIN HV OUT1 OUT2 I2C bus HV892 GND2 CHV 4.7nF 100V VDD 1.7 - 2.95V VIN 2.65 - 5.5V CIN 2.2μF 6.3V Liquid Lens 100 - 200pF

Supertex inc. www.supertex.com Doc.# DSFP-HV892 A042314 Absolute Maximum Ratings Parameter Value VIN, VDD -0.5V to +6.5V SDA, SCL -0.5V to +6.5V Operating temperature -40°C to +85°C Storage temperature -65°C to +150°C Electrical Specifications (Over recommended operating conditions @ TA = 25OC unless otherwise specified) Pin Configuration Product Marking 10-Lead DFN (top view) Note: Pads are at the bottom of the package. Center heat slug is at ground potential Recommended Operating Conditions Sym Parameter Min Typ Max Units Conditions VIN Supply voltage 2.65 - 5.50 V --- VDD I2C logic level reference 1.70 - 2.95 V --- tVIN Time for VIN to ramp to 90%1 - - 2.0 ms --- CIN Supply bypass capacitor - 2.2 - μF --- CHV High voltage storage capacitor 24 - - x CLOAD 100V rating CLOAD Load (lens) capacitance 100 150 200 pF --- fSCL I2C clock - - 400 kHz --- TA Ambient temperature -25 - +85 OC --- Notes: 1. To assure the driver powers up in standby state. No damage will occur if ramped up slower. 10-Lead DFN Sym Parameter Min Typ Max Units Conditions IIN VIN supply current - - 500 nA AMP = 00h, SDA = VDD, SCL = VDD - 8.0 20 mA AMP = FFh, SDA = VDD, SCL = VDD IDD VDD supply current - - 500 nA AMP = 00h, SDA = VDD, SCL = VDD - 9.0 12 μA AMP = FFh, SDA = VDD, SCL = VDD HV Output voltage of internal boost converter 71 75 79 V C LOAD = 0pF 4 7 6 5 VIN SCL NC SDA VDD OUT1 OUT2 GND2 10 1 GND1 HV H892 YWLL Y = Last Digit of Year Sealed W = Code for Week Sealed L = Lot Number = “Green” Packaging Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. Package may or may not include the following marks: Si orTypical Thermal Resistance Package Rθja 10-Lead DFN (4x4) 44OC/W -G indicates package is RoHS compliant (‘Green’)

Ordering Information

Part Number Package Option Packing HV892K7-G 10-Lead DFN (4x4) 3000/Reel ESD Sensitive Device

Supertex inc. www.supertex.com Doc.# DSFP-HV892 A042314 Sym Parameter Min Typ Max Units Conditions VOUT(AC) AC output voltage - 0 - VRMS AMP = 00h 9.0 10 11 AMP = 01h 58.5 62.0 65.5 AMP = FFh VOUT(DC) DC output offset voltage -2.0 0 +2.0 V --- DNL Differential non-linearity (guaranteed monotonic) -1.0 - +1.0 LSB --- fOUT Output frequency 1.0 1.5 2.0 kHz --- DX Transition time (fraction of period) - 4.7 - % --- dV/dt Output slope - 4.7 - V/μs CLOAD = 150pF, VIN = 3.8V tSU Startup time to 90% amplitude1 - - 20 ms AMP = 00h → FFh, CHV = 4.7nF tA Amplitude response time1 - - 5.0 ms Over any 1-step AMP increment or decrement (except 00h) V IL Logic low input voltage - - 0.30 x VDD --- VIH Logic high input voltage 0.7 - - x VDD --- VOL Logic low output voltage - - 0.2 x VDD ILOAD = 3.0mA IL Logic low input current - - 10 μA VDD = 1.70 - 2.95V IH Logic high input current - - 10 μA VDD = 1.70 - 2.95V CLI Logic input capacitance - - 10 pF VDD = 1.70 - 2.95V, grounded or open Notes: 1. Measured from the rising edge of the I2C acknowledge bit that terminates transmission of the AMP data byte. Electrical Specifications (cont.)(Over recommended operating conditions @ TA = 25OC unless otherwise specified) Block Diagram and Typical Application VIN DC/DC SDA SCL Osc H-bridge Driver HV enable Host Controller VDIG 1.70 - 2.95V VANA 2.65 - 5.50V CHV 4.7nF 100V CLENS 100 - 200pF OUT1 OUT2 I2C bus GND2 amp CIN 2.2µF 6.3V Control DAC GND1 VDD HV892

Supertex inc. www.supertex.com Doc.# DSFP-HV892 A042314 Applications Information I2C The HV892 is a write-only fast mode I2C device. Logic voltages are referenced to VDD. Address The HV892 recognizes a 7-bit address. The device is pre-programmed with an I 2C address of 0100011b. For other ad- dresses, please contact the factory. Data A single byte written to the HV892 controls the operation of the lens driver. See the Command Table below. The MSB is clocked-in first. Command Table AMP Description 00h Low power standby mode. When in standby mode, the internal boost converter and H-bridge oscillator are shut down, and the OUT pins are held at ground. Any AMP value other than 00h brings the HV892 out of standby mode. The time it takes the HV892 to exit standby mode and achieve full output amplitude is less than 20ms with a 4.7nF capacitor on the HV pin. Faster startup times may be achieved by lowering C HV at the expense of possible waveform distortion. 01h-FFh Controls output amplitude according to: VOUT(RMS) = 9.8VRMS + AMP • 205mVRMS Supplies VIN should be ramped up in less than 2.0ms to assure the driver starts-up in standby mode. If brought up slower, the driver may not start-up in standby mode, with output amplitude at an indeterminate level. In this case, writing AMP = 00h brings the driver to standby mode. No damage will occur if ramped slower than 2.0ms. Output Waveform DX 1/fOUT dV/dt (all edges) V OUT AMP = FFh DX AMP < FFh

Supertex inc. www.supertex.com Doc.# DSFP-HV892 A042314 Pin Functions Pin Name Description 1 GND1 Ground for the DC–DC converter. Connect GND1 and GND2 together close to the IC. 2 VIN Input voltage. Bypass with a 2.2µF capacitor to GND1. 3 SCL Clock for the I2C interface. The HV892 is a Fast Mode device (fSCL ≤ 400kHz). 4 SDA Serial data for the I2C interface. The HV892 is a write-only device, with a single 8-bit command byte (AMP, see page 4). 5 VDD Externally supplied reference voltage for the I2C logic levels. Connect to the I2C bus supply. 6 GND2 Ground for the IC except the DC-DC converter. Connect GND1 and GND2 together close to the IC. 7 OUT2 Outputs of the H-bridge driver. The liquid lens connects between these two pins. When disabled (AMP = 00h), both of these outputs are held at ground.8 OUT1 9 NC Not connected. 10 HV High voltage DC output of the internal boost converter. Connect a 4.7nF, 100V ceramic capacitor to ground close to the IC. Exposed backside pad is at ground potential and should be connected to circuit ground.

Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such appl ications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liabilit y to the replacement of the devices determined defective due to workmanship. No responsibility is assumed for possible omissions and inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications refer to the Supertex inc. (website: http//www.supertex.com) ©2014 Supertex inc. All rights reserved. Unauthorized use or reproduction is prohibited. Supertex inc.

1235 Bordeaux Drive, Sunnyvale, CA 94089

Tel: 408-222-8888 www.supertex.com HV892 Doc.# DSFP-HV892 A042314 10-Lead DFN Package Outline (K7) 4.00x4.00mm body, 0.80mm height (max), 0.65mm pitch Symbol A A1 A3 b D D2 E E2 e L L1 θ Dimension (mm) MIN 0.70 0.00 0.20 REF 0.65 BSC 0.30 0.00* 0O JEDEC Registration MO-229, Variation WGGC, Issue C, Aug. 2003. * This dimension is not specified in the JEDEC drawing. Drawings not to scale. Supertex Doc.#: DSPD-10DFNK74X4P065, Version B041309. Seating Plane Top View Bottom View D E L View B Note 3 Note 2 Note 1 (Index Area D/2 x E/2) Note 1 (Index Area D/2 x E/2) eb A θ Side View View B Notes: 1. A Pin 1 identifier must be located in the index area indicated. The Pin 1 identifier can be: a molded mark/identifier; an embedded metal marker; or a printed indicator. 2. Depending on the method of manufacturing, a maximum of 0.15mm pullback (L1) may be present. 3. The inner tip of the lead may be either rounded or square.