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MAX16801B Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX16801B Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 15 page Off-Line and DC-DC PWM Controllers for High-Brightness LED Drivers ______________________________________________________________________________________ 11 MAX16801 VSUPPLY IN VOUT VCC R1 R6 R5 C1 C2 C3 C4 LEDs Q1 D1 T1 R7 R4 R3 D2 R2 CS NDRV COMP GND DIM/FB UVLO/EN GND Figure 5. Off-line Nonisolated Flyback LED Driver with Programmable Input-Supply Start Voltage Application Circuits Figure 5 shows an off-line application of a HB LED dri- ver using the MAX16801. The use of transformer T1 allows significant design flexibility. Use the internal error amplifier for a very accurate LED current control. Figure 6 shows a discontinuous flyback LED driver with linear dimming capability. The total LED voltage can be lower or higher than the input voltage. Figure 7 shows a continuous conduction mode HB LED buck driver with linear dimming and just a few external components. Figure 8 shows an off-line isolated flyback HB LED dri- ver with low-frequency PWM using MAX16801. The PWM signal needs to be inverted (see the Functional Diagram). Transformer T1 provides full safety isolation and operation from universal AC line (85VAC to 265VAC). |
Similar Part No. - MAX16801B |
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Similar Description - MAX16801B |
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