Overview
Description
The EL7583 is a 3-channel DC/DC converter IC that is designed primarily for use in TFT-LCD applications. It features a PWM boost converter with 2.7V to 14V input capability and 5V to 17V output, which powers the column drivers and provides up to 470mA at 12V, 370mA at 15V from a 5V supply. A pair of charge pump control circuits provides regulated outputs of VON and VOFF supplies at 8V to 40V and -5V to -40V, respectively, each at up to 60mA.
Features
- TFT-LCD display supply
- Boost regulator
- VON charge pump
- VOFF charge pump
- 2.7V to 14V VIN supply
- 5V <VBOOST <17V
- 5V <VON <40V
- -40V <VOFF <0V
- VBOOST = 12V at 470mA
- VBOOST = 15V at 370mA
- High frequency, small inductor DC/DC boost circuit
- Over 90% efficient DC/DC boost converter capability
- Adjustable frequency
- Adjustable soft-start
- Adjustable outputs
- Small parts count
- Pb-free plus anneal available (RoHS compliant)
Applications
Documentation
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| Type | Title | Date |
| Application Note |
PDF
453 KB
AI-generated Summary:
The document details thermal design considerations for the EL75XX series, focusing on the 28 PSOP 2 package. It explains two versions of the package—slug down and slug up—with different mounting and heat dissipation options. Various heatsink configurations, bonding materials, and forced air convection methods improve thermal performance, enabling power dissipation from 2W up to 9W. Thermal resistance values and the effects of airflow on heat dissipation are analyzed with graphical data.
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| Application Note |
PDF
817 KB
AI-generated Summary:
The document details the design of a high-efficiency DC-DC converter using the EL75XX series. It explains the pin functions, including charge pump capacitors, voltage doubler input, ground connections, and control signals. The basic buck regulator topology is described, showing how the output voltage depends on input voltage and duty cycle. It also covers synchronized rectification, replacing diodes with low-resistance FETs to improve efficiency and reduce power loss, with the addition of a Schottky diode to enhance reliability during transient states.
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2 items
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Product Options
| Part Number | Status | Stock | Sampleable | Pb (Lead) Free | ECCN (US) | HTS (US) |
|---|---|---|---|---|---|---|
| EL7583IR-EVAL | Obsolete | Out of Stock | Available | No | EAR99 | 8473.30.1180 |
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