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Electroluminescent Lamp Drivers

High Side Power Switches


IMP offers a full line of Electroluminescent (EL) lamp driver integrated circuits. The four EL lamp-driving functions are integrated on chip. These are the switch-mode power supply, its high-frequency oscillator, the high-voltage H-bridge lamp driver and its low-frequency oscillator. The IMP522 dual EL lamp driver allows two EL lamps to be driven independently. Either or both EL lamp driver outputs are activated with a Lamp Select pin. Drive voltage is 220 Vpeak-to-peak.

The IMP527 operates from a single 1.5V battery cell and develops a 180V peak-to-peak output voltage for driving EL lamps to maximum brightness. The IMP527 also has a shutdown mode where supply current is reduced to 1 microampere typically. The IMP528 features a 220 V peak-to-peak output voltage for driving EL lamps to maximum brightness. The 220 volt AC peak-to-peak drive signal is developed from a 2.0 volt to 6.5 volt DC input voltage. For EL lamps commonly used in battery powered handheld communication and computing devices, the IMP528 output will be held constant by an internal regulator, maximizing brightness over the full battery life. This is an important benefit in battery operated applications. The IMP560 has the same pin-out as the IMP803, but output drive voltage is limited to 120V peak-to-peak, reducing inductor current by typically 50%. For small EL lamps or applications with moderate ambient light levels, the IMP560 offers significant power savings. The IMP525 operates at voltages as low as 0.9V. It is ideal for single-cell battery applications. The IMP803 is designed as a direct replacement for the Supertex HV803. Two application notes AN-1 and AN-4 are available to assist you in designs. (http://www.ds-imp.com.cn/application.html) EL driver package options include the 8-pin SO and 8/10-pin MicroSO.
Please call 86574-87906358 or email sales@ds-imp.com.cn for EL driver samples and price information.
 
PEL Driver Selection Guide and Data Sheets
IMP Part
Number
Packages
Input Voltage
Range (V)
Output Voltage (Vpp)
Number of Drivers
Samples Available
 Data Sheet
IMP522
10-MicroSO
2.0 to 6.5V
220
2
Prototype: Feb. 2001
IMP525
8-SO, 8-MicroSO, Die
0.9 to 2.5V
112
1
Yes
8-SO, 8-MicroSO, Die 0.9 to 2.5V
180
1
Yes
IMP528
8-SO, 8-MicroSO, Die
2.0 to 6.5
220
1
Yes
IMP560
8-SO, 8-MicroSO, Die
2.0 to 6.5
120
1
Yes
IMP803
8-SO, 8-MicroSO, Die
2.0 to 6.5
180
1
Yes
IMP also offers EL drivers in die form. For additional information download our die specifications: ELDie.pdf

Cross Reference

IMP Part Number
Supertex Part Number
IMP525
HV825
IMP560
?
IMP803
HV803

 
 
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