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Part: SP4425Q
Category:
Interface and Interconnect
Description: Electroluminescent Lamp Driver Low Voltage Applications
Company: Sipex Corporation
Datasheet: Download SP4425Q datasheet File size : 77 kB
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Datasheet text preview:
®
SP4425 Electroluminescent Lamp Driver Low Voltage Applications
s Low Voltage, Single Battery Operation (VBATTERY > 1.1 VDC) s DC to AC Inverter for EL Backlit Display Panels s Externally Adjustable Internal Oscillator s Low Current Standby Mode
APPLICATIONS
s Pagers s Digital Watches s Backlit LCD Displays
DESCRIPTION
The SP4425 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC power supply. The SP4425 is capable of supplying up to 220 VPP signals, making it ideal for driving electroluminescent lamps. The device features 1 µA (typical) standby current for use in low power portable products. One external inductor is required to generate the high voltage charge and one external capacitor is used to select the oscillator and lamp frequencies. The SP4425 is offered in both an 8-pin narrow SOIC and 8-pin micro SOIC package. For delivery in die form, please consult the factory.
COSC VSS COIL D1
1 2 3 4 SP4425
8 7 6 5
HON VDD EL1 EL2
SP4425 Block Diagram
SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VDD..........5V Input Voltages/Currents HON (pin1).......-0.5V to (VDD + 0.5V) COIL (pin3)...100mA Lamp Outputs......230VPP Storage Temperature....-65°C to +150°C Power Dissipation Per Package 8-pin NSOIC (derate 6.14mW/oC above +70oC).........500mW 8-pin µSOIC (derate 4.85mW/oC above +70oC)..........390mW
The information furnished herein by Sipex has been carefully reviewed for accuracy and reliability. Its application or use, however, is solely the r e s p o n s i b i l i t y of the user. No responsibility for the use of this information is assumed by Sipex, and this information shall not explicitly or implicitly become part of the terms and conditions of any subsequent sales agreement with Sipex. Specifications are subject to change without prior notice. By the sale or transfer of this information, Sipex assumes no responsibility for any infringement of patents or other rights of third parties which may result from its use. No license or other proprietary rights are granted by implication or otherwise under any patent or patent rights of Sipex Corporation.
SPECIFICATIONS
(T= 25°C; VDD = 1.5V; Lamp Capacitance = 8200pFwith 1 00 Series resistance; Coil = 470µH at 4 Ohms; COSC = 180pF unless otherwise noted); CINT=1800pF
PARAMETER Supply Voltage, VDD Supply Current, ICOIL+IDD Coil Voltage, VCOIL HON Input Voltage, VHON LOW: EL off HIGH: EL on HON Current, EL on Shutdown Current, ISD=ICOIL+IDD INDUCTOR DRIVE Coil Frequency, fCOIL=fLAMPx64 Coil Duty Cycle Peak Coil Current, IPK-COIL EL LAMP OUTPUT EL Lamp Frequency, fLAMP Peak to Peak Output Voltage
MIN. 1.1
TYP. 1.5 30
MAX. 1.7 60 1.7
UNITS V mA V
CONDITIONS
VHON=VDD=1.5V
V DD -0.25 VDD-0.25 0 VDD 3 1
0.25V VDD+0.25 15 5
V µA µA
internal pulldown, VHON=VDD=1.5V VHON=0V
25.6 90 90
kHz % mA Guaranteed by design.
300 120 90
400 160
500
Hz
TAMB=+25OC, VDD=1.5V TAMB=-40OC to +85OC, VDD=1.5V TAMB=+25OC, VDD=1.5V TAMB=-40OC to +85OC, VDD=1.5V
VPP
SP4425DS/20
SP4425 Electroluminescent Lamp Driver
© Copyright 2000 Sipex Corporation
2
(T= 25°C; VDD = 3.0V; Lamp Capacitance = 4nF with 100 Series resistance; Coil = 2mH/44ohms; COSC = 180pF, CINT = 470pF unless otherwise noted)
PARAMETER Supply Voltage, VDD Supply Current, ICOIL+IDD Coil Voltage, VCOIL HON Input Voltage, VHON LOW: EL off HIGH: EL on HON Current, EL on Shutdown Current, ISD=ICOIL+IDD INDUCTOR DRIVE Coil Frequency, fCOIL=fLAMPx64 Coil Duty Cycle Peak Coil Current, IPK-COIL EL LAMP OUTPUT EL Lamp Frequency, fLAMP
MIN. 2.2
TYP. 3.0 28
MAX. 3.3 35 3.3
UNITS V mA V VHON=VDD=3V
CONDITIONS
VDD -0.25 VDD-0.25 0 VDD 5 1
0.25V VDD+0.25 20 8
V µA µA
internal pulldown, VHON=VDD=3V VHON=0V
28.8 90 90
kHz % mA Guaranteed by design.
350 275 120 170 120
450
550 775
Hz
TAMB=+25OC, VDD=3.0V TAMB=-40OC to +85OC, VDD=3.0V TAMB=+25OC, VDD=2.2V TAMB=+25OC, VDD=3.0V TAMB=-40OC to +85OC, VDD=3.0V
Peak to Peak Output Voltage
150 190
VPP
This data sheet specifies environmental parameters, final test conditions and limits as well suggested operating conditions. For applications which require performance beyond the specified condition and or limits please consult the factory.
Bonding Diagram:
HON VDD EL1
PAD
VD D EL1 EL2 D1 COIL V SS C OSC HON
X
261.0 813.0 813.0 813.0 767.0 143.5 -790.0 -785.5
Y
427.0 429.0 28.0 -172.0 -381.0 -412.0 -157.5 402.0
COSC EL2 D1
73 x 46 MS666
Coil VSS
NOTES: 1. Dimensions are in Microns unless otherwise noted. 2. Bonding pads are 125x125 typical. 3. Outside dimensions are maximum, including scribe area. 4. Die thickness is 10 mils +/- 1. 5. Pad center coordinates are relative to die center. 6. Die size 74 x 44 mils.
SP4425DS/20
SP4425 Electroluminescent Lamp Driver
© Copyright 2000 Sipex Corporation
3
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