HV853MG-G

HV853 High Voltage, Low Noise, Inductorless EL Lamp Driver Features General Description ► No external components required when using an external EL clock frequency ► Audible noise reduction with improved EMI ► EL frequency can be set by an external resistor ► DC to AC converter ► Drives up to 5.3nF (approx. 1.5in2 lamp) load ► Output voltage regulation ► Enable function ► EL Lamp dimming ► Available in 10-Lead DFN and 8-Lead MSOP packages The Supertex HV853 is a high voltage, low noise EL (electroluminescent) lamp driver. It is the low noise version of the HV852 with improved EMI performance, operating over an input voltage range of 3.2V to 5.0V. It is designed to drive EL lamps of up to 1.5in2, with capacitive values up to 5.3nF. The HV853 converts a low voltage DC input to a high voltage AC output across an EL lamp. A nominal regulated output voltage of ±80V is applied to the EL lamp. It uses a charge pump scheme to boost the input voltage eliminating the need for an external inductor, diode, and high voltage capacitor commonly found in conventional topologies. Applications ► ► ► ► Cellular phone keypad Watches Small handheld wireless devices MP3 Players The charge pump circuit discharges its energy into an EL lamp through a high voltage H-bridge. Once the voltage reaches its regulated limit, it is turned off to conserve power. The EL lamp is then discharged to ground and the H-bridge changes state to allow the charge pump to charge the EL lamp in the opposite direction. The EL lamp frequency can be set either by an external resistor REL or by applying an external clock where the clock frequency is divided by 128 to set the EL lamp frequency. Typical Application Circuits VDD = ON VDD = ON GND = OFF GND = OFF 1 + VDD - CDD REL 2 3 4 VDD VA REL VB EN GND CLKIN CLKEN 8 7 6 5 HV853MG EL Lamp Frequency set by REL EL LAMP 1 + VDD - CDD 2 3 4 VDD GND VDD REL EN CLKIN VA VB GND CLKEN 8 7 6 5 EL LAMP VDD HV853MG EL Lamp Frequency set by External Clock ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com HV853 Ordering Information Pin Configurations Package Options DEVICE HV853 10-Lead DFN VDD 1 8-Lead MSOP 3.00x3.00mm body 0.80mm height (max) 0.50mm pitch 3.00x3.00mm body 1.10mm height (max) 0.65mm pitch HV853K7-G HV853MG-G 10 VA REL 2 9 EN 3 8 GND CLKIN 4 7 GND NC 5 6 -G indicates package is RoHS compliant (‘Green’) VB CLKEN VDD 1 8 VA REL 2 7 VB EN 3 6 GND CLKIN 4 10-Lead DFN (K7) (top View) Note: Pads are at the bottom of the package. Center heat slug should be connected to GND or left floating. 5 CLKEN 8-Lead MSOP (MG) (top view) Product Marking Absolute Maximum Ratings Parameter Y = Last Digit of Year Sealed W = Code for Week Sealed L = Lot Number = “Green” Packaging H853 YWLL Value 10-Lead DFN (K7) -0.5V to 6.5V VDD, supply voltage Top Marking -65°C to +150°C Storage temperature Power dissipation (10-Lead DFN) Power dissipation (8-Lead MSOP) H853 LLLL 1.6W 300mW 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. Bottom Marking YYWW L = Lot Number YY = Year Sealed WW = Week Sealed = “Green” Packaging 8-Lead MSOP(MG) Recommended Operating Conditions Sym Parameter Min Typ Max Units VDD Input voltage 3.2 - 5.0 V --- fEL EL lamp frequency 50 - 500 Hz --- EL lamp capacitance 0 - 5.3 nF --- -25 - +85 O C --- Min Typ Max Units - - 150 nA Peak output voltage 68 80 92 V Peak to peak output voltage 136 160 184 V - 15 30 mA Peak output voltage 68 80 92 V Peak to peak output voltage 136 160 184 V EL lamp frequency 240 280 320 Hz Cload TA Operating temperature Conditions Electrical Characteristics (Over recommended operating conditions unless otherwise specified, TA = 25ºC) Sym Parameter IDDQ Quiescent current VA or VB VA-VB IDD VA or VB VA-VB fEL Operating current Conditions EN = 0V No load See Figure 1 VDD = 3.5V REL = 1.5MΩ Load = 3.3nF + 1.0kΩ ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com 2 HV853 Electrical Characteristics (cont.) (Over recommended operating conditions unless otherwise specified, TA = 25ºC) Sym Parameter Min Typ Max Units Conditions trout Output voltage rise time - 450 - µs 1.0in2 lamp 0V to 90% of final value tfout Output voltage fall time 150 - - µs 90% to 10% of final value Logic Inputs VIL Input logic low voltage 0 - 0.5 V --- VIH Input logic high voltage 2.0 - VDD V --- IIL Input logic low current - - 1.0 µA --- IIH Input logic high current - - 1.0 µA --Using external R-C circuit, see Figure 2 ENrise Enable input rise time (for delay turn off) 0.01 - 10 ms ENfall Enable input fall time (for delay turn off) 10µ - 5.0 s - - 10 pF VSENSE High Voltage Level Translators Cin Logic input capacitance --- Typical Output Waveform Functional Block Diagram VDD EN VDD Capacitor Charge Pump Circuit VA Feedback CLKIN VDD CLKEN EL Oscillator VB MOSFET Full Bridge REL GND ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com 3 HV853 Typical Performance (The following was the observed performance when driving a 1.0in2 green lamp) REL Load VDD (MΩ) 3.3nF + 1.0kΩ 1.5 (V) (mA) IDD VA-VB 3.2 13.1 158 3.5 12.9 158 3.8 12.7 158 4.2 12.5 158 5.0 12.3 158 (V) Figure 1: Typical Application + CDD VDD - 1 REL 2 3 4 VDD = ON GND = OFF VDD VA REL VB EN CLKIN GND CLKEN 8 EL Lamp 7 6 5 HV853MG Figure 2: Push Button Turn on with Delay Turn off 1 + VDD - REL Push Button Turn On 2 3 CDD 4 C R VDD REL EN CLKIN VA VB GND CLKEN 8 EL Lamp 7 6 5 HV853MG RC time constant will set Turn OFF Delay time Figure 3: Independent Programmable Output Frequency (fEL) + VDD - CDD VDD = ON GND = OFF 1 2 3 4 VDD REL EN CLKIN VA 8 VB 7 GND CLKEN EL Lamp 6 5 VDD HV853MG GND Note: fEL = fCLK/128 VDD fCLK ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com 4 fEL (Hz) 294 HV853 EL Lamp Dimming Using PWM EL lamp dimming can be achieved by applying a PWM signal to the ENABLE pin. This is done by pulse skipping the output pulses. The PWM frequency should be kept below the EL frequency but above 50Hz to avoid flickering. Figure 4: PWM Dimming Circuit + VDD PWM Signal CDD VDD R EL 1 VDD VA 8 2 REL VB 7 3 EN GND 4 CLKIN EL Lamp GND 6 CLKEN 5 HV853MG Pin Descriptions: 10-Lead DFN (K7) / 8-Lead MSOP (MG) K7 MG Pin Name 1 VDD Input supply voltage pin. REL An external resistor to VDD will set the EL lamp frequency. The EL frequency is inversely proportional to the REL resistor value. A 1.5MΩ resistor would provide a nominal lamp frequency of 280Hz fEL = (1.5MΩ)(280Hz) / (REL) Pin # 1 2 2 Description When using an external clock to set the EL lamp frequency, the REL pin should be connected to ground. 3 3 EN Enable input pin. Logic high will turn the device on. An external R-C circuit can be added for a delayed turn off. Logic input pin. An external logic clock applied to this pin can be used to set the EL lamp frequency (see Figure 3). The EL lamp frequency is the external clock frequency divided by 128. This is useful for applications requiring the EL lamp to be synchronized to a system clock. Connect to ground when not in use. 4 4 CLKIN 5 - NC 6 5 CLKEN 7,8 6 GND 9 7 VB EL lamp driver output pin. The EL lamp is connected across VA and VB terminals. 10 8 VA EL lamp driver output pin. The EL lamp is connected across VA and VB terminals. No connect. Logic input pin. Logic high will cause the EL lamp frequency to be set by the CLKIN input. Logic low will cause the EL lamp frequency to be set by the external REL resistor. IC ground pin. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com 5 HV853 10-Lead DFN Package Outline (K7) 3.00x3.00mm body, 0.80mm height (max), 0.50mm pitch D2 D 10 10 E E2 Note 1 (Index Area D/2 x E/2) 1 Top View 1 e b Note 1 (Index Area D/2 x E/2) View B Bottom View Note 3 θ A A3 L Seating Plane L1 Note 2 A1 View B Side View 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. Symbol Dimension (mm) A A1 MIN 0.70 0.00 NOM 0.75 0.02 MAX 0.80 0.05 A3 0.20 REF b D D2 E E2 0.18 2.85* 2.20 2.85* 1.40 0.25 3.00 - 3.00 - 0.30 3.15* 2.70 3.15* 1.75 e 0.50 BSC L L1 θ 0.30 0.00* 0O 0.40 - - 0.50 0.15 14O JEDEC Registration MO-229, Variation WEED-5, Issue C, Aug. 2003. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. Drawings not to scale. Supertex Doc.#: DSPD-10DFNK73X3P050, Version C101008. ● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com 6 HV853 8-Lead MSOP Package Outline (MG) 3.00x3.00mm body, 1.10mm height (max), 0.65mm pitch D θ1 (x4) 8 E E1 L 1 Seating Plane θ L1 Top View View B A A Gauge Plane L2 Note 1 (Index Area D/2 x E1/2) View B A2 b e A1 A Seating Plane View A-A Side View Note: 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. Symbol Dimension (mm) A A1 A2 b D E E1 MIN 0.75* 0.00 0.75 0.22 2.80* 4.65* 2.80* NOM - - 0.85 - 3.00 4.90 3.00 MAX 1.10 0.15 0.95 0.38 3.20* 5.15* 3.20* e 0.65 BSC L 0.40 0.60 0.80 L1 0.95 REF L2 0.25 BSC θ θ1 0 5O O - - 8 15O O JEDEC Registration MO-187, Variation AA, Issue E, Dec. 2004. * This dimension is not specified in the original JEDEC drawing. The value listed is for reference only. Drawings are not to scale. Supertex Doc. #: DSPD-8MSOPMG, Version G101008. (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to http://www.supertex.com/packaging.html.) Supertex inc. does not recommend the use of its products in life support applications, and will not knowingly sell them for use in such applications unless it receives an adequate “product liability indemnification insurance agreement.” Supertex inc. does not assume responsibility for use of devices described, and limits its liability 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. ©2008 All rights reserved. Unauthorized use or reproduction is prohibited. Doc.# DSFP-HV853 B110308 7 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com