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Details, datasheet, quote on part number:HV839MG
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Datasheet text preview:
HV831/HV839
HV831/HV839
Demo Kit Available
High Voltage Dual EL Lamp Driver
General Description
The Supertex HV831 and HV839 are high voltage drivers designed for driving two EL lamps with a combined area of 3.5 square inches. The input supply voltage range is from 2.0V to 5.0V. The device is designed to reduce the amount of audible noise emitted by the lamp. These devices use a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ±80V for HV831 and ±90V for HV839. HV839 will provide higher brightness due to its higher output voltage regulation. The chip can be disabled by connecting C1 and C2 (pins 1 and 4) to GND. The HV831 and HV839 have an internal oscillator, a switching MOSFET, and two high voltage EL lamp drivers. The frequency for the switching MOSFET is set by an external resistor connected between the RSW-OSC pin and the voltage supply pin VDD. The EL lamp driver frequency is set by dividing the MOSFET switching frequency by 128. An external inductor is connected between the LX and VDD pins. Depending on EL lamp size, 0.001 to 0.01µF, 100V capacitor is connected between CS and Ground. The EL lamps are connected between EL1 to Com and EL2 to Com. Two input control pins (C1 and C2) are available to select various modes of the device. The device can be disabled by applying GND to both C1 and C2 (pins 1 and 4). C1 and C2 control the ON/ OFF states of EL1 and EL2, respectively. EL1 will be ON when C1 is at VDD and EL2 will be ON when C2 is at VDD. EL1 and EL2 will be ON when both C1 and C2 are at VDD. The switching MOSFET charges the external inductor and discharges it into the capacitor at CS. The voltage at CS will start to increase. Once the voltage at CS reaches a nominal value of 80V for HV831 and 90V for HV839, the switching MOSFET is turned off to conserve power. The outputs EL1 to Com and EL2 to Com are configured as H bridges and are switching in opposite states to achieve 160/180V across the EL lamp for HV831/ HV839.
Features
Independent input control for lamp selection Split supply capability Patented output timing One minature inductor to power both lamps 150nA shutdown current Wide input voltage range (2.0V to 5.0V) Output voltage regulation No SCR output Small package 10-pin MSOP dual EL driver IC Low audible noise via Patent Pending technology
Applications
Mobile cellular phones, dual display Keypad and LCD backlighting Portable instrumentation Dual segment lamps Hand held wireless communication devices
Typical Application Circuit
VDD
0
VDD
0
VDD
1 C1 2 VDD 3 RSW-OSC 4 C2
EL1 10 EL2 Com CS LX
EL Lamp 1
9
EL Lamp 2
8 7
1N914
+
VIN
5 GND
6
LX Cs 100V
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HV831MG/ HV839MG
03/24/03
Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the 1 Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website.
HV831/HV839
Ordering Information
Device HV831 HV839 Output Regulation Voltage 80V 90V Package Options MSOP-10 HV831MG* HV839MG* Die HV831X HV839X
Absolute Maximum Ratings**
Supply voltage, VDD Output voltage, VCS Operating Temperature Range Storage Temperature Range 10 Pin MSOP Power Dissipation
** All voltages are referenced to ground.
-0.5V to 7.5V -0.5V to +120V -40°C to +85°C -65°C to +150°C 250mW
* Product supplied on 2500 piece carrier tape reels only.
Recommended Operating Conditions
Symbol VDD TA Supply voltage Operating temperature Parameter Min 2.0 -40 Typ Max 5.0 85 Units V °C Conditions
Function Table
C1 0 0 1 1 C2 0 1 0 1 EL1 HI Z HI Z ON ON EL2 HI Z ON HI Z ON Com HI Z ON ON ON IC OFF ON ON ON
Pin Configuration
C1 VDD RSW-OSC C2 GND
1 2 3 4 5 top view MSOP-10
10 EL1 9 8 7 6
EL2 Com VCS LX
2
HV831/HV839
HV831 Electrical Characteristics
DC Characteristics (Over recommended operating conditions unless otherwise specified, TA = 25°C)
Symbol RDS(ON) VDD VCS VDIFF IDDQ IDD Parameter On-resistance of switching transistor Input voltage range Output regulation voltage Differential output peak to peak voltage (EL1 to Com, EL2 to Com) Quiescent VDD supply current Input current into VDD pin 2.0 72 144 80 160 Min Typ Max 6.0 5.0 88 176 150 150 45 IIN Input current including inductor current when driving both lamps 26.5 VCS VDIFF fEL fSW fSW Drift D IIL IIH VIL VIH Output voltage on VCS when driving both lamps Differential output peak to peak voltage across each lamp (EL1 to COM, EL2 to COM) Vdiff output drive frequency Switching transistor frequency Switching transistor frequency Drift Switching transistor duty cycle Input logic low current going into the control pin Input logic high current going into the control pin Logic input low voltage Logic input high voltage 0 1.75 85 215 27.5 67.8 135.6 244 31.2 270 35 ±5.0 89 -0.6 0.6 0.25 VDD 35 V V Hz KHz KHz % µA V V VDD = 2.0V to 5.0V. See Figure 1. mA Units V V V nA µA VDD = 2.0V to 5.0V VIN = 3.0V. TA = -40° C to +85° C. See Figure 1. VIN = 3.0V. TA = 25° C. See Figure 1. VIN = 3.0V. See Figure 1. VIN = 3.0V. See Figure 1. VIN = 3.0V. See Figure 1. VIN = 3.0V. See Figure 1. TA = -40° C to +85° C VDD = 2.0V to 5.0V VDD = 2.0V to 5.0V Conditions I = 100mA
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