HV853 High Voltage, Low Noise, Inductorless EL Lamp Driver Features General Description No external components required when using an The Supertex HV853 is a high voltage, low noise EL external EL clock frequency (electroluminescent) lamp driver. It is the low noise version of the HV852 with improved EMI performance, operating over an Audible noise reduction with improved EMI input voltage range of 3.2V to 5.0V. It is designed to drive EL EL frequency can be set by an external resistor 2 lamps of up to 1.5in , with capacitive values up to 5.3nF. The DC to AC converter HV853 converts a low voltage DC input to a high voltage AC 2 Drives up to 5.3nF (approx. 1.5in lamp) load output across an EL lamp. A nominal regulated output voltage Output voltage regulation of 80V is applied to the EL lamp. It uses a charge pump Enable function scheme to boost the input voltage eliminating the need for an EL Lamp dimming external inductor, diode, and high voltage capacitor commonly found in conventional topologies. Available in 10-Lead DFN and 8-Lead MSOP packages The charge pump circuit discharges its energy into an EL lamp through a high voltage H-bridge. Once the voltage reaches Applications its regulated limit, it is turned off to conserve power. The EL lamp is then discharged to ground and the H-bridge changes Cellular phone keypad state to allow the charge pump to charge the EL lamp in the Watches opposite direction. Small handheld wireless devices The EL lamp frequency can be set either by an external MP3 Players resistor R or by applying an external clock where the clock EL frequency is divided by 128 to set the EL lamp frequency. Typical Application Circuits V = ON V = ON DD DD GND = OFF GND = OFF 1 8 1 8 VA VA VDD VDD + + EL EL R EL 2 7 2 7 V V LAMP C DD C DD LAMP REL VB DD REL VB DD 3 6 3 6 - - EN GND EN GND 4 5 4 5 CLKIN CLKEN CLKIN CLKEN V DD V DD GND H V 8 5 3 M G H V 8 5 3 M G EL Lamp Frequency set by R EL Lamp Frequency set by External Clock EL 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.comHV853 Ordering Information Pin Congurations Package Options 1 10 VDD 1 8 VDD VA VA 10-Lead DFN 8-Lead MSOP REL 2 9 VB DEVICE 2 7 VB REL 3.00x3.00mm body 3.00x3.00mm body EN 3 8 GND 0.80mm height (max) 1.10mm height (max) EN 3 6 GND 4 CLKIN 7 GND 0.50mm pitch 0.65mm pitch 5 NC 6 CLKEN 4 5 CLKIN CLKEN HV853 HV853K7-G HV853MG-G -G indicates package is RoHS compliant (Green) 10-Lead DFN (K7) 8-Lead MSOP (MG) (top View) (top view) Note: Pads are at the bottom of the package. Center heat slug should be connected to GND or left oating. Product Marking Y = Last Digit of Year Sealed H853 W = Code for Week Sealed Y W L L L = Lot Number Absolute Maximum Ratings = Green Packaging Parameter Value 10-Lead DFN (K7) V , supply voltage -0.5V to 6.5V DD Top Marking Storage temperature -65C to +150C H 8 5 3 Power dissipation (10-Lead DFN) 1.6W L L L L Power dissipation (8-Lead MSOP) 300mW L = Lot Number Absolute Maximum Ratings are those values beyond which damage to YY = Year Sealed the device may occur. Functional operation under these conditions is not Bottom Marking WW = Week Sealed implied. Continuous operation of the device at the absolute rating level may affect device reliability. All voltages are referenced to device ground. = Green Packaging Y Y W W 8-Lead MSOP(MG) Recommended Operating Conditions Sym Parameter Min Typ Max Units Conditions V Input voltage 3.2 - 5.0 V --- DD f EL lamp frequency 50 - 500 Hz --- EL C EL lamp capacitance 0 - 5.3 nF --- load O T Operating temperature -25 - +85 C --- A Electrical Characteristics (Over recommended operating conditions unless otherwise specied, T = 25C) A Sym Parameter Min Typ Max Units Conditions I Quiescent current - - 150 nA EN = 0V DDQ V or V Peak output voltage 68 80 92 V A B No load V -V Peak to peak output voltage 136 160 184 V A B I Operating current - 15 30 mA DD See Figure 1 V or V Peak output voltage 68 80 92 V V = 3.5V A B DD R = 1.5M V -V Peak to peak output voltage 136 160 184 V EL A B Load = 3.3nF + 1.0k f EL lamp frequency 240 280 320 Hz EL 1235 Bordeaux Drive, Sunnyvale, CA 94089 Tel: 408-222-8888 www.supertex.com 2