SP4425CU Sipex Corporation, SP4425CU Datasheet

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SP4425CU

Manufacturer Part Number
SP4425CU
Description
Electroluminescent lamp driver low voltage applications
Manufacturer
Sipex Corporation
Datasheet

Specifications of SP4425CU

Dc
00+

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APPLICATIONS
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 V
driving electroluminescent lamps. The device features 1 A (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.
SP4425 Block Diagram
SP4425DS/20
Digital Watches
Low Voltage, Single Battery Operation
(V
DC to AC Inverter for EL Backlit
Display Panels
Externally Adjustable Internal Oscillator
Low Current Standby Mode
Pagers
Backlit LCD Displays
BATTERY
> 1.1 VDC)
®
COIL
C
V
OSC
D1
SS
Electroluminescent Lamp Driver
1
4
2
3
SP4425 Electroluminescent Lamp Driver
SP4425
Low Voltage Applications
1
8
7
6
5
PP
HON
V
EL2
EL1
signals, making it ideal for
DD
© Copyright 2000 Sipex Corporation
SP4425

Related parts for SP4425CU

SP4425CU Summary of contents

Page 1

... For delivery in die form, please consult the factory. C OSC V SS COIL D1 SP4425 Block Diagram SP4425DS/20 Electroluminescent Lamp Driver Low Voltage Applications SP4425 SP4425 Electroluminescent Lamp Driver 1 SP4425 signals, making it ideal for PP HON V DD EL1 EL2 © Copyright 2000 Sipex Corporation ...

Page 2

... © Copyright 2000 Sipex Corporation =1800pF INT ...

Page 3

... 261.0 427.0 813.0 429.0 813.0 28.0 813.0 -172.0 767.0 -381.0 143.5 -412.0 -790.0 -157.5 -785.5 402.0 © Copyright 2000 Sipex Corporation ...

Page 4

... HON Coil 1M SCR1 f COIL f LAMP Q FF6 Q f LAMP V EL2 Lamp SP4425 Electroluminescent Lamp Driver 4 Capacitor value that gives the OSC . The LAMP /f will always equal 64. COIL LAMP = 1.5 BATTERY C =1800pF typ INT 4 D1 SCR2 EL1 5 6 © Copyright 2000 Sipex Corporation ...

Page 5

... F capacitor will cause the output to charge and discharge rapidly creating a square wave output. For most applications an 1800pF integrator capacitor is suitable. SP4425 Electroluminescent Lamp Driver 5 LAMP =400Hz. LAMP © Copyright 2000 Sipex Corporation ...

Page 6

... There are many variables which can be optimized for specific applications. Sipex supplies characterization charts to aid the designer in selecting the optimum circuit configuration (see page 7 and 8). SP4425 Electroluminescent Lamp Driver 6 with a frequency the same application with © Copyright 2000 Sipex Corporation ...

Page 7

... F Low ESR Decoupling Capacitor EL Lamp 5Ftl 1.5 sq.in. 4nF NOTE: Keep high voltage traces short and away from V DD and clock lines =ON DD 0.1 F Low ESR Decoupling Capacitor 100 5Ftl 8.2nF DD =ON DD 0.1 F Low ESR Decoupling Capacitor 100 5Ftl 4nF DD © Copyright 2000 Sipex Corporation ...

Page 8

... Lamp = 1.5 sq 180pF D1N4148 1.2 1 1.1 Lamp = 1.5 sq 180pF D1N4148 SP4425DS/20 V Peak LAMP 1.2 1.25 1.3 1.35 1.4 V (Volts TOTAL 1.3 1.4 V (Volts) DD SP4425 Electroluminescent Lamp Driver 8 Inductors H/DCR A 470/4 B 470/11 C 470/4 1.45 1.5 D 470/2.3 E 470/3.4 Inductors H/DCR A 470/4 B 470/11 C 470/4 1.5 D 470/2.3 E 470/3.4 © Copyright 2000 Sipex Corporation ...

Page 9

... V DD Lamp = 1.5 sq 180pF D1N4148 SP4425DS/20 1.3 1.4 1.5 (Volts) DD 1.3 1.4 1.5 (Volts) SP4425 Electroluminescent Lamp Driver 9 Inductors H/DCR A 470/4 B 470/11 C 470/4 D 470/2.3 E 470/3.4 Inductors H/DCR A 470/4 B 470/11 C 470/4 D 470/2.3 E 470/3.4 © Copyright 2000 Sipex Corporation ...

Page 10

... Coil=2mH/ =470pF; C INT 3.0V 2. SP4425 Electroluminescent Lamp Driver 10 1.5V 1. Temperature ( C) O =180pF; OSC =4.7nF LOAD 3.0V 2. Temperature ( C) O =180pF; OSC =4nF LOAD @3V vs. Temperature Temperature ( C) O =180pF; OSC =4nF LOAD © Copyright 2000 Sipex Corporation ...

Page 11

... Figure 3. EL voltage waveforms from the EL1 and EL2 outputs Differential representation (EL1-EL2) Figure 4. El differential output waveform of the EL1 and EL2 outputs SP4425DS/20 V =80V (typical) PEAK EL1 Output -EL2 Output SP4425 Electroluminescent Lamp Driver 11 EL1 Output -EL2 Output V = 160V PP (typical) © Copyright 2000 Sipex Corporation ...

Page 12

... Dia .115 Max 5.0 0.3 4.5 4.0 0.2 7.3 4.5 Max 2.75 Max NEC Corporation Tokyo, Japan Phone: (03) 3798-9572 Fax: (03) 3798-6134 Seiko Precision Chiba, Japan Phone: (03) 5610-7089 Fax: (03) 5610-7177 Gunze Electronics 2113 Wells Branch Parkway Austin, TX 78728 Phone: (512) 752-1299 Fax: (512) 252-1181 © Copyright 2000 Sipex Corporation ...

Page 13

... SP4425CU 0.050 BSC 0.020 0.020 1 2 0.116 0.004 0.013 0.005 0.118 0.002 50 SP4425CU per tube SOIC-8 13" reels: P=8mm, W=12mm Standard qty per reel 2500 2500 SP4425 Electroluminescent Lamp Driver 13 8-pin SOIC 12.0˚ 4˚ 0.012 0.008 0.003 0˚ - 6˚ ...

Page 14

... Model SP4425CN . ............................................ -40˚C to +85˚C ......................................... 8-Pin NSOIC SP4425CU . ............................................ -40˚C to +85˚C ......................................... 8-Pin SOIC SP4425CX .............................................. -40˚C to +85˚C ........................................................ Die SP4425NEB ..................................................... N/A ............................... NSOIC Evaluation Board SP4425UEB ..................................................... N/A ............................... SOIC Evaluation Board Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE ...

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