L6902集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器規(guī)格書PDF中文資料

L6902屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由意法半導(dǎo)體集團(tuán)制造生產(chǎn)的L6902穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。

Description

The L6902D is a complete and simple step down switching regulator with adjustable current limit.

Based on a voltage mode structure it integrates a current error amplifier to have a constant voltage and constant current control.

By means of an on board current sense resistor and the availability of the current sense pins (both compatible to Vcc and for Cs- compatible with GND too) a current limit programming is very simple and accurate (±5). Moreover constant current control can be used to charge NiMH and NiCd batteries.

The device can be used as a standard DC/DC converter with adjustable current limit (set by using the external sense resistor)

Features

■ Up to 1 A output current

■ Operating input voltage from 8 V to 36 V

■ Precise 3.3 V (±2) reference voltage

■ 5 output current accuracy

■ Output voltage adjustable from 1.235 V to 34 V

■ 250 kHz internally fixed frequency

■ Voltage feedforward

■ Zero load current operation

■ Adjustable current limit

■ Protection against feedback Disconnection

■ Thermal shutdown

Applications

■ Chargers for NiCd, NiMH batteries and preregulator for lithium-ion batteries

■ Adjustable current generator

■ Simple step-down converters with adjustable current limit

■ Battery equipped systems

■ Distributed power supply

■ Mobile PC and subnotebook