パッケージ情報
パッケージ | ピン数 WQFN (RTW) | 24 |
動作温度範囲 (℃) |
パッケージ数量 | キャリア 1,000 | SMALL T&R |
LM27965 の特徴
LM27965 に関する概要
The LM27965 is a highly integrated charge-pump-based dual-display LED driver. The device can drive up to 9 LEDs in parallel with a total output current of 180mA. Regulated internal current sinks deliver excellent current and brightness matching in all LEDs.
The LED driver current sinks are split into three independently controlled groups. The primary group can beconfigurabled with
4 or 5 LEDs, for backlighting a larger main display and the second group can be configured with 2 or 3 LEDs, for backlighing
a smaller secondary display. An additional, independently controlled led driver is provided for driving an indicator or general
purpose LED. The LM27965 has an I
The device provides excellent efficiency without the use of an inductor by operating the charge pump in a gain of 3/2, or in Pass-Mode. The proper gain for maintaining current regulation is chosen based on LED forward voltage, so that efficiency is maximized over the input voltage range.
The LM27965 is available in National's small 24-pin Leadless Leadframe Package (LLP-24).