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AA1700 Datasheet(PDF) 8 Page - Agamem Microelectronic Inc. |
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AA1700 Datasheet(HTML) 8 Page - Agamem Microelectronic Inc. |
8 / 10 page Agamem Microelectronics Inc. AA1700 PRELIMINARY Constant Current White LED driver ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2007/1/22 8 4 3 2 1 5 6 7 8 Q2 C1815 P0 GND CLK ER IN SP Vcc CTL Note: 1.Light striking the surface of the Cds causes a decrease in resistance, while darkness produces a higher resistance. When the light is bright, Q3 is on and Q2 is off, AA1700 will enter stand-by mode and there is no output current provided. When the light is dark, Q3 is off and Q2 is on, AA1700 will output current and driver the IR LEDs. If the light Is gray, the Q2 and Q3 will enter active mode, the impedance of Cds will decide the collector current of Q3 and also Impact on the Internal impedance of Q2, so the driving current can be controlled. 2.VR1 is for light sensitive control, the value will decide how darkness of the light source the IR LEDs will brighten. CdS Light Sensitive Resistor VR1 50K Q3 C1815 R7 300Ω Vcc D3 R2 C8 10uF 390Ω R8 4.7KΩ CDS Control for IR LED |
Similar Part No. - AA1700 |
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Similar Description - AA1700 |
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