LT1776 High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime
The LT®1776 is a wide input range, high efficiency Buck (step-down) switching regulator. The monolithic die includes all oscillator, control and protection circuitry. The part can accept input voltages as high as 60V and contains an output switch rated at 700mA peak current. Current mode control delivers excellent dynamic input supply rejection and short-circuit protection.
The LT1776 contains several features to enhance efficiency. The internal control circuitry is normally powered via the VCC pin, thereby minimizing power drawn directly from the VIN supply (see Applications Information). The action of the LT1776 switch circuitry is also load dependent. At medium to high loads, the output switch circuitry maintains fast rise time for good efficiency. At light loads, rise time is deliberately reduced to avoid pulse skipping behavior.
The available SO-8 package and 200kHz switching frequency allow for minimal PC board area requirements
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LT1776 订购信息和价格参考Package Variations and Pricing
| 器件型号 | 封装 | 引脚 | 温度 | 价格 (以 1 ~ 99 片为批量) | 价格 (以 1000 片为批量) * |
| LT1776CN8 | PDIP | 8 | C | $3.05 | $2.50 |
| LT1776CN8#PBF | PDIP | 8 | C | $3.05 | $2.50 |
| LT1776CS8 | SO | 8 | C | $3.15 | $2.60 |
| LT1776CS8#PBF | SO | 8 | C | $3.15 | $2.60 |
| LT1776CS8#TR | SO | 8 | C | $2.66 | |
| LT1776CS8#TRPBF | SO | 8 | C | $2.66 | |
| LT1776IN8 | PDIP | 8 | I | $3.55 | $2.85 |
| LT1776IN8#PBF | PDIP | 8 | I | $3.55 | $2.85 |
| LT1776IS8 | SO | 8 | I | $3.60 | $3.00 |
| LT1776IS8#PBF | SO | 8 | I | $3.60 | $3.00 |
| LT1776IS8#TRPBF | SO | 8 | I | $3.06 |
LT1776 数据手册及相关资料下载
- 数据手册(英文) : LT1776 - High Power CCFL Controller for Wide Dimming Range and Maximum Lamp Lifetime.PDF
- 设计要点 (英文) : DN191 - The LT1776 Provides Power for the IEEE1394 Fire Wire.PDF
- 设计要点 (英文) : DN202 - 60V, High Efficiency Buck Switching Regulators in SO-8.PDF
- 可靠性数据 : R012 Reliability Data .PDF
