A6260 ALLEGRO [Allegro MicroSystems], A6260 Datasheet
A6260
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A6260 Summary of contents
Page 1
... For automotive applications, optimum performance is achieved when driving between 1 and 3 LEDs at cur- rents up to 350 mA. The low dropout voltage of the A6260 allows a single white LED to be driven safely, at full current, with a supply voltage down enable input allows PWM dimming and can be used to enable low-current sleep mode ...
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... A6260 Selection Guide Part Number A6260KLJTR-T 3000 pieces per reel Absolute Maximum Ratings* Characteristic Load Supply Voltage EN Pin Voltage LA and LC Pins Voltage LSS Pin Voltage SENSE Pin Voltage THTH Pin Voltage Ambient Operating Temperature Range Junction Operating Temperature Range Storage Temperature Range ...
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... A6260 VBATT R TH Terminal List Table Number High Brightness LED Current Regulator Functional Block Diagram VIN Reg Control EN Logic THTH Temp Temp Comp Monitor Reference Slew Limit Generator GND Pin-out Diagram SENSE 1 8 LSS GND THTH VIN ...
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... A6260 ELECTRICAL CHARACTERISTICS valid at T Characteristics Supply and Reference 1 V Functional Operating Range IN V Quiescent Current IN V Shutdown Current IN Startup Time Current Regulation Maximum Current Sink Current Sink Current Sink Accuracy SENSE Reference Voltage Switch Dropout Voltage Regulator Saturation Voltage Output Current Slew Time ...
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... The A6260 is a constant current controller, that is, it controls the output current irrespective of output voltage (within the compli- ance range). This allows the outputs of two or more A6260s to be connected in parallel (see figure 4e, in the Applications Infor- mation section). In this configuration, each A6260 must have a ...
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... Note that EN can be used for PWM dimming even when the high-side switch is bypassed. (See figure 4(d)). Sleep Mode When EN is held low, the A6260 will be in shutdown mode and all internal circuits will low-power sleep mode. In this mode, the input current will be less than 10 μ ...
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... A6260. As the junction temperature of the A6260 increases, the integrated temperature monitor lowers the regulated current level, reducing the dissipated power in the A6260 and in the LEDs. As shown in figure 2, from the full 100% current level (see the LED Current Level section), current is reduced at a rate of 4% per degree Celsius typically, until the point at which the current drops to 25% of the full level ...
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... A6260 example, with R connected − 124 124 THTH R Figure 3 shows how the nominal value of the thermal monitor activation temperature varies with the voltage at THTH and with a pull-down resistor GND or with a pull-up resistor 5V. In extreme cases, if the chip temperature exceeds the overtem- ...
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... A6260 Automotive VIN 12V Power Net PWM Dimming and EN On-Off Control THTH SENSE GND Ground (a) Basic circuit with PWM Automotive VIN 12 V Power Net EN THTH SENSE GND Ground (c) Simple switched supply (lamp replacement) Automotive 12 V Power Net PWM Dimming and On-Off Control Ground Figure 4 ...
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... A6260 Package LJ 8-Pin SOICN with Exposed Thermal Pad 8X 0.10 C 0.41 Copyright ©2007, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to per- mit improvements in the per for mance, reliability, or manufacturability of its products ...