一款高效率，稳定可靠的高亮度
LED 灯驱动控制IC，内置高精度比较器，
off-time控制电路，恒流驱动控制电路等，特
别适合大功率，多个高亮度LED灯串恒流驱动。采用固定off-time控制工作方式，
其工作频率高达2MHz，可使外部电感和滤波电
容、体积减少，效率提高。off-time小时间，
可通过外部电阻和电感进行设置，工作频率根
据用户要求而改变。在EN端加PWM信号，可调
节LED 灯的亮度。
通过调节外置的电阻，能控制高亮度LED
灯的驱动电流，使LED 灯亮度达到预期恒定亮
度，流过高亮度LED 灯的电流可从几毫安到2
安培变化。
特性
可编程驱动电流
高效率：高达90%
宽输入电压范围：2V~400V
高工作频率：2 MHz
驱动LED灯功能强：LED 灯串可从1 个到几
十个LED高亮度灯
亮度可调：通过EN 端PWM，调节LED 灯亮
度
LED 灯电流5MA-2A
应用范围
干电池供电LED灯串
LED 灯杯
RGB 大显屏高亮度LED 灯
平板显示器LED背光灯
恒流充电器控制
通用恒流源
封装：SOT89-5
LY73XX
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
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
LY6118
封装： SOT223 TO252
