SD9910B是一款高效恒流LED 驱动电路，支持从8V 到 600V 的宽工作电压输入。采用固定频率或固定关断时间模式，频率或关断时间通过外接电阻可调。其驱动电流大小由外接电阻设定，其驱动电流可以从几毫安一直到高超过 1 安培。
           SD9910B支持线性调光和 PWM 脉宽调光。具有欠压保护、过温保护、过流保护等功能，大限度地保障使用安全。
           产品应用
●DC/DC、AC/DC LED 驱动应用
●RGB 背光 LED 驱动
●平板显示器背光驱动
●普通应用恒流源
●LED 信号灯或装饰灯
●汽车用 LED 灯
●恒流充电器

          产品特点

●8~600V 宽输入电压范围
●工作效率可达 90%以上
●恒流输出 LED 驱动
●从几 mA 到 1A 的宽驱动能力
●可驱动 1 个到上百个 LED 灯串
●固定频率或固定关断时间工作模式
●频率或关断时间可调
●外部线性及 PWM 调光
●欠压、过温、过流保护等功能
●采用无铅 SOP8 封装

The LY73XX series is a set of three-terminal, low power, high voltage regulators implemented in CMOS  ogy. The series features extremely low quiescent cur-technol-rent which is typically 4uμA. They  high as 12V. The device provides large current with aallow input voltages as significantly small dropout voltage.

The LY73XX consists of a high-precision voltage refer- ence, an error correction circuit, and a current limnited output driver. They are available with several fixed out-put voltages ranging from 1.8V to 5.0V. CMOS technol-ogy ensures low dropout voltage and low current consumption. Although designed primarily as fixed volt-age regulators, these devices can be used with external components to generate variable voltages and currents.

   Features

UItra low quiescent current: 4μA (typ.)

High input voltage (up to 12V)

Output voltage:1.8V, 2.5V, 2.7V, 3.0V, 3.3V, 3.5V, 5.0V

Output voltage accuracy: tolerance +3%

Maximum output current: 250mA

Low dropout voltage

Low temperature coefficient

package：TO-92, SOT-89-3  SOT23-3 

  Application

Battery-powered equipment

Voltage regulator for microprocessor

Voltage regulator for L AN cards

Wireless Communication equipment

Audio/Video equipment

LY76XX serieslow-dropoutlinear voltage regulators with a built-in voltage reference module, error correction module and phase compensation module. LY76XX series are based on the CMOS process and allow high voltage input with low quiescent current. This series can deliver 100mA output current and allow an input voltage as high as 40V.This series has the function of internal feedback resistor setting from 2.1Vto 12V. The output accuracy is t 2%.

    Features

High output accuracy:土2%

Input voltage: up to 40 V

Output voltage: 2.1V ~ 12V

Utralow quiescent current (Typ.=3μA) Output Current: lour= 100mA

(When VIN = 5.5V and Vout =3.3V)Low temperature cofficient

Ceramic capacitor can be used

Package: SOT89-3. T092、SOT23-3

    Typical Application

Electronic weighbridge

SCM

Phones, cordless phones

Security Products

Water meters, power meters