The PAM2803 is a step-up DC-DC converter that delivers a regulated output current. The device switches at a 1.0MHz constant frequency, allowing for the use of small value external inductor and ceramic capacitors. The PAM2803 is targeted to be used for driving loads up to 1A from a two-cell alkaline battery. The LED current can be programmed by the external current sense resistor, RS, connected between the feedback pin (FB) and ground. A low 95mV feedback voltage reduces the power loss in the Rs for better efficiency. With its internal 2A, 100mΩ NMOS switch, the device can provide high efficiency even at heavy load. During the shutdown mode, the feedback resistor RS and the load are completely disconnected and the current consumption is reduced to less than 1µA. The PAM2803 is available in the 6-lead SOT23-6 package.
PAM2803特点：
LED Power Efficiency: up to 90%
Current Accuracy: 5%(VIN = 3.6V to 1.8V @VF = 3.7V）
Low Start-Up Voltage: 0.9V (ILED = 270mA)
Low Hold Voltage: 0.75 (ILED = 200mA)
1MHz Switching Frequency
Uses Small, Low Profile External Components
Low RDS(ON): 100mΩ (typ)
Over Temperature Protection
Low Profile SOT23-6 Package
Pb-Free Package
PAM2803应用：
White LED Torch (Flashlight)
White LED Camera Flash
DSC (Digital Still Camera) Flash
Cellular Camera Phone Flash
PDA Camera Flash
Camcorder Torch (Flashlight) Lamp
公司:深圳市哲瀚电子科技有限公司
联系人:陈小姐
手机:13714441972
电话:0755-82549527/83259945/13714441972
传真:0755-83259945
地址:深圳市福田区深圳市福田区华强北街道深南中路3006号佳和大厦3C006
