SD3390B是一个高效PWM LED驱动器控制芯片，它在输入电压DC/DC从10V~600V范围内能有效驱动高亮LED。该芯片能以高达300kHz的固定频率驱动外部MOSFET，其 频率外部电阻编程决定.为了保正亮度恒定并增强LED的可靠 性，外部高亮LED串采用恒流方式控制，而不是恒压控制. 其恒流值由外部取样电阻值决定，变化范围从几毫安到1安培。SD3390B使用了一个高压隔离连接工艺能经受高达600V的浪涌输入电压的冲击。对一个 LED 串的输出电流能被编程设定在零和它的大值之间的任何值，它由输入到SD3390B的线性调光器的外部控制电压所控制。另外SD3390B也提供一个低频的PWM 调光功能，能接受一个外部达几千赫磁的控制信号在0-100% 的占空比下进行调光。
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
