LY2326 是一款PWM控制模式的开关型DC/DC 升压恒流芯片。用来驱动3W 大功率白光LED，LED 电流可通过调节外部电阻恒定在500mA～1A，且95mV 的反馈电压可减小外部电阻的功率损耗。LY2326的具有1100KHz 的固定开关频率，因此外围器件可使用低值电感和陶瓷电容。
LY2326只适用于两节串联干电池驱动1W 或3W 的白光LED， LY2326 一节干电池即可驱动单颗1W 或3W 的白光LED。
特点
1. 高效率：92％
2. LED 恒流精度：±10％
3. 低启动电压：0.9V（ILED＝270mA）
4. 低保持电压：0.75V（ILED＝200mA）
5. 开关频率：1000KHz(TYP.)
6. 仅需电容、电感、肖特基二极管、电阻等少量外部元器件
7. 低导通电阻：100mΩ（TYP.）
8. 开路LED 保护
9. 过温保护
封装形式：SOT-23-6
典型应用： 给大功率LED 提供能源 恒流源
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
