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SP4491EU Datasheet(PDF) 3 Page - Sipex Corporation |
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SP4491EU Datasheet(HTML) 3 Page - Sipex Corporation |
3 / 13 page Rev. 12/19/00 SP4491 Two Panel Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation 3 PIN ASSIGNMENTS Pin 1 — ELEN1 — Electroluminescent Lamp Enable Control Line 1. This is a control line to enable a single or dual EL lamp output. Refer to Table 1 for the control logic. Pin 2 — V DD — Positive Battery Power Supply. Connect such that +2.636V < V DD < +3.15V. Pin 3 — R OSC — Oscillator Resistor. Connecting a resistor between this input pin andV DD sets the frequency of the internal clock. Pin 4 — ELEN2 — Electroluminescent Lamp Enable Control Line 2. This a control line to enable a single or dual EL lamp output. Refer to Table 1 for the control logic. Pin 5 — V SS — Power Supply Common. Con- nect to the lowest circuit potential, typically ground. Pin 6 — COIL — Coil. The inductor for the boost converter is connected from V BATT to this input pin. Pin 7 — CAP — Integrator Capacitor. An integrating capacitor (1800pF typically) connected from this pin to ground filters out any coil switching spikes or ripple present in the output waveform to the EL lamps. Con- necting a fast recovery diode from COIL to CAP increases the light output of the EL lamp. Pin 8 — EL COMMON — Electroluminescent Common. This is a high voltage lamp driver output pin common to both EL lamps. Pin 9 — EL2 — Electroluminescent Lamp Out- put 2. This is a high voltage lamp driver output pin connect to the second EL lamp. Pin 10 — EL1 — Electroluminescent Lamp Output 1. This is a high voltage lamp driver output pin to connect to the first EL lamp. PINOUT ROSC VDD ELcommon EL1 1 2 3 4 7 8 9 10 VSS 5 EL2 COIL 6 CAP SP4491 ELEN1 ELEN2 |
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