a8530 Allegro MicroSystems, Inc., a8530 Datasheet
a8530
Related parts for a8530
a8530 Summary of contents
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... LED brightness and on/off can be controlled for 4 display backlight LEDs and 2 flash/torch LEDs through 2 single-wire serial interface pins. The A8530 is available in a very thin profile (0.75 mm nominal height) 3 mm× QFN/MLP 16 pin package. Applications include: ▪ White LED backlights for cellular phones, PDAs ▪ ...
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... J(max) Storage Temperature, T ................................................... –55°C to 150°C S Use the following complete part number when ordering: Part Number A8530EESTR-T *Contact Allegro for additional packing options. Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver Functional Block Diagram C1 1 µF C1 – ...
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... A8530 Terminal List Table Name Number C1– 13 Negative terminal of capacitor C1. Connect capacitor C1 between C1+ and C1–. C1+ 16 Positive terminal of capacitor C1. C2– 15 Negative terminal of capacitor C2 C2+ 1 Positive terminal of capacitor C2. Connect capacitor C2 between C2+ and C2–. ENF 4 Enable and dimming control input for flash/torch. ...
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... A8530 a ELECTRICAL CHARACTERISTICS T = –40°C to +85°C; typical values are Characteristics Input Voltage Range Undervoltage Lockout Threshold UVLO Hysteresis Window Quiescent Current Soft-start Completion Time ISET Bias Voltage ISET Leakage in Shutdown ISET Current Range ISET to LEDx Current Ratio for LED1 through LED4 ...
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... A8530 Efficiency versus Supply Voltage for LED1 through LED4, in parallel 2.7 3.1 3.5 3 (V) Logic Level 1.2 1 1.0 0.9 0.8 0.7 0.6 0.5 2.7 3.1 3.5 3 (V) Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver Performance Characteristics Tests performed using application circuit shown in figure 25° ...
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... A8530 LED5-6 ON, 1.5× mode 200 mA OUT Symbol Parameter Units/Division C3 V Ripple OUT C4 I Ripple IN t time LED5-6 ON, 2× mode 200 mA OUT Symbol Parameter Units/Division C3 V Ripple OUT C4 I Ripple IN t time LED1-4 ON, 1.5× mode mA, V ...
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... A8530 Turn ON LED1 Mode 280 mA IN OUT Symbol Parameter C1 V and V ENF ENM C2 V OUT C3 I OUT t time Ultracompact 6-Channel Backlight and Flash/Torch White LED Driver Performance Characteristics Tests performed using application circuit shown in figure 25°C ...
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... Application Information in 1 × mode unless the 150 mV threshold. When V enters 1.5× mode. When the A8530 switches from 1× to 2× mode, it first switches to 1.5× mode for a typical duration before entering 2× mode. When operating in 1.5× mode switches back to 1× mode every 130 ms, and then reenters 1.5× ...
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... LED6) brightness and on/off can be controlled using digital input at ENF pin. ENF accepts one-wire serial pulse input to enable the A8530 and to set dimming levels, from 100 mA (the default 100% level) down to 5 mA. When the ENF pin is initially pulled up from shutdown, after a ...
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... Normal operation will be resumed when the fault is removed. LED Disconnection Every LEDx pin has a disable subcircuit, as shown in figure 8. The A8530 compares the voltage on each LED pin, and if the voltage on the pin is greater than either V V – 0.4 V, then the corresponding LED pin is disabled. ...
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... A8530 17X 0.08 C +0.05 0.25 –0.07 +0.15 0.40 –0. Copyright ©2005-2008, 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 ...