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PAM2803 Datasheet(PDF) 1 Page - Power Analog Micoelectronics |
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PAM2803 Datasheet(HTML) 1 Page - Power Analog Micoelectronics |
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1 / 8 page  Features LED Power Efficiency: up to 90% Current Accuracy: 5%(V =3.6V to 1.8V @V =3.7V) 1MHz Switching Frequency Uses small, Low Profile External Components Low RDS(ON) : 100mΩ (TYP.) Open LED Protection Over Temperature Protection Low Profile SOT-23-6 Package Pb-Free Package ± IN F Low Start-Up Voltage: 0.9V(I =270mA) Low Hold Voltage:0.75V(I =200mA) White LED Torch (Flashlight) White LED Camera Flash DSC(Digital Still Camera)Flash Cellular Camera Phone Flash PDA Camera Flash Camcorder Torch(Flashlight) Lamp The PAM2803 is a set-up DC-DC converter that delivers a regulated output current. The device switches at a 1 .0MHz c onstant 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, 100 device can provide high efficiency e ven a t 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 1uA. The PAM2803 is available in the 6-lead SOT-23-6 package. LED LED Applications General Description mΩ NMOS switch, the n n n n n n n n n n n n n n n n n Typical Application 95mV Reference + A1 - Rc Cc - A2 + Comparator VOUT VIN SW PWM Logic And Driver + - GND 1.0MHz Oscillator Shutdown And Soft-start FB Σ Ramp Generator SHDN Block Diagram 1 www.poweranalog.com 08/2007 PAM2803 3W High Power White LED Driver 10uF 2.2uH 10uF OFF ON R S 3 2 1 6 5 4 SW VIN VOUT FB SHDN GND WLED V IN C O C IN 3W PAM2803 I =750mA, R =0.127 LED S Ω , Power Analog Microelectronics Inc |
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Descripción similar - PAM2803 |
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