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HV825, HV825LG, HV826

Table of contents:
Info of HV825
Info of HV825LG
Info of HV826

HV825, HV825LG, HV826 Selling Leads, Datasheet

MFG:SARRIS Package Cooled:SMD8 D/C:00+

HV825, HV825LG, HV826 Datasheet download

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Part Number: HV825

MFG: SARRIS

Package Cooled: SMD8

D/C: 00+

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HV825 General Description

The Supertex HV825 is a high voltage driver designed for driving EL lamps typically up to 6nF. The input supply voltage range is from 1.0V to 1.6V. The device uses a single inductor and a minimum number of passive components. Typical output voltage that can be applied to the EL lamp is ±56V.

The HV825 can be enabled/disabled by connecting the RSW-osc resistor to VDD/ground.

The HV825 has two internal oscillators, a switching bipolar junction transistor (BJT), and a high voltage EL lamp driver. The frequency for the switching BJT is set by an external resistor connected between the RSW-osc pin and the supply pin V_DD. The EL lamp driver frequency is set by an external resistor connected between REL-osc pin and the V_DD pin. An external inductor is connected between the LX and V_DD pins. A 0.01 to 0.1F, 100V capacitor is connected between C_S and ground. The EL lamp is connected between V_A and V_B.

The switching BJT charges the external inductor and discharges it into the 0.01 to 0.1F, 100V capacitor at C_S. The voltage at C_S will start to increase. The outputs V_A and V_B are configured as an H-bridge and are switching in opposite states to achieve a peak-to-peak voltage of two times the V_CS voltage across the EL lamp.

HV825 Maximum Ratings

Supply voltage, V_DD                          -0.5V to +2.5V
Operating Temperature Range     -25°C to +85°C
Storage Temperature Range      -65°C to +150°C
MSOP-8 Power Dissipation                           300mW
SO-8 Power Dissipation                               400mW

Note:
*All voltages are referenced to GND.

HV825 Features

· Processed with HVCMOS^® technology
· 1.0V to 1.6V operating supply voltage
· DC to AC conversion
· Output load of typically up to 6nF
· Adjustable output lamp frequency
· Adjustable converter frequency
· Enable function

HV825 Typical Application

· Pagers
· Portable Transceiver
· Cellular phones
· Remote control units
· Calculators

HV825 Connection Diagram

HV826 General Description

The Supertex HV826 is a high voltage driver designed for driving EL lamps. The input supply voltage range is from 1.8V to 3.5V. The device uses a single inductor and a minimum number of passive components. The nominal regulated output voltage that is applied to the EL lamp is ±80V. The chip can be enabled/ disabled by connecting the resistor on R _SW-OSC to V_DD/ground.

The HV826 has two internal oscillators, a switching MOSFET, and a high voltage EL lamp driver. The frequency for the switching MOSFET is set by an external resistor connected between the R _SW-osc pin and the supply pin V_DD. The EL lamp driver frequency is set by an external resistor connected between REL-osc pin and the V_DD pin. An external inductor is connected between the LX and VDD pins. A 0.01-0.1F capacitor is connected between C_S and ground. The EL lamp is connected between V_A and V_B.

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, the switching MOSFET is turned OFF to conserve power. The outputs VA and VB are configured as an H bridge and are switching in opposite states to achieve 160V peak-to-peak across the EL lamp.

HV826 Maximum Ratings

Supply Voltage, V_DD                       -0.5V to +4.5V
Output Voltage, V_Cs                      -0.5V to +100V
Operating Temperature Range    -25° to +85°C
Storage Temperature Range   -65°C to +150°C
MSOP-8 Power Dissipation                        250mW
SO-8 Power Dissipation                            400mW

HV826 Features

· 1.8V to 3.5V operating supply voltage
· DC to AC conversion
· Adjustable output frequency
· Adjustable switch frequency
· Output voltage regulation
· Enable/disable function

HV826 Typical Application

· Mobile cellular phones
· Pagers
· Portable Transceivers
· Remote Control Units
· Calculators

HV826 Connection Diagram

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