Datasheet ALED6000 (STMicroelectronics) - 4

ALED6000 Pin settings 3 Pin settings 3.1 Pin connection Figure 3. Pin connection (top view)
VBIAS 1 16 GND VIN 2 15 BOOT VIN 3 14 LX VCC 4 EXPOSED 13 LX PAD TO EN 5 SGND 12 DIM SS 6 11 ILIM SYNCH 7 10 FSW COMP 8 9 FB
3.2 Pin description Table 1. Pin description # Pin Description
Auxiliary input that can be used to supply part of the analog circuitry to increase the efficiency at light load. 1 VBIAS Connect to GND if not used or bypass with a 1 µF ceramic capacitor if supplied by an auxiliary rail 2 VIN DC input voltage 3 VIN DC input voltage Filtered DC input voltage to the internal 4 VCC circuitry. Bypass to the signal GND by a 1 µF ceramic capacitor Active high enable pin. Connect to VCC 5 EN pin if not used An internal current generator (5 µA 6 SS typ.) charges the external capacitor to implement the soft-start 7 SYNCH Master / slave synchronization Output of the error amplifier. The 8 COMP designed compensation network is connected on this pin 9 FB Inverting input of the error amplifier A pull-down resistor to GND selects the 10 FSW switching frequency
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Document Outline Cover image Features Applications Description 1 Application schematic 2 Block diagram 3 Pin settings 3.1 Pin connection 3.2 Pin description 3.3 Maximum ratings 3.4 Thermal data 3.5 ESD protection 4 Electrical characteristics 5 Functional description 5.1 Oscillator and synchronization 5.2 Soft-start 5.3 Digital dimming 5.4 Error amplifier and light-load management 5.5 Low VIN operation 5.6 Overcurrent protection 5.7 Overtemperature protection 6 Application information 6.1 Input capacitor selection 6.2 Output capacitor and inductor selection 6.3 Compensation strategy 6.4 Thermal considerations 6.5 Layout considerations 7 Demonstration board 8 Application notes – alternative topologies 8.1 Inverting buck-boost 8.2 Positive buck-boost 8.3 Floating boost 8.4 Compensation strategy for alternative topologies 9 Package information 9.1 HTSSOP16 package information Revision history