Manuali utente per STMicroelectronics STEVAL-TLL009V1 Camera flash based on the STCF07 STEVAL-TLL009V1

Sommario

• Table 1. Device summary

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• 1 Block diagram

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  • Figure 1. STCF07 block diagram

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• 2 Pin configuration

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  • Figure 2. STCF07 pin connections (top view)

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  • Table 2. STCF07 pin description

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• 3 Maximum ratings

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  • Table 3. Absolute maximum ratings

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  • Table 4. Thermal data

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• 4 Application information

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  • Figure 3. Application schematic diagram

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  • Table 5. List of external components

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• 5 Electrical characteristics

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  • Table 6. Electrical characteristics

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• 6 Introduction

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• 7 Logic pin description

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  • 7.1 CSEL pin

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  • 7.2 FAULT pin

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  • 7.3 ENABLE pin

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• 8 Detailed description

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  • 8.1 Buck-boost converter

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  • 8.2 High current mode

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  • 8.3 Low current mode

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  • 8.4 Shutdown mode

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  • 8.5 Soft-start

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    • Figure 4. Startup: LED current rise time

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  • 8.6 STCF07 protection features

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    • 8.6.1 Peak current and short-circuit protection

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    • 8.6.2 Overvoltage protection

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    • 8.6.3 Thermal shutdown protection

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    • 8.6.4 Sensing of LED temperature with the NTC resistor

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      • Figure 5. Typical LED temperature sensing application with the NTC resistor

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    • 8.6.5 Undervoltage lockout function

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• 9 PCB design

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  • 9.1 PCB design rules

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  • 9.2 PCB design of the demonstration board

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    • Figure 6. Top layer

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    • Figure 7. Bottom layer

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    • Figure 8. Top overlay

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  • 9.3 Schematic of the demonstration board

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    • Figure 9. Schematic diagram of the STCF07 demonstration board

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• 10 Typical performance characteristics

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  • Figure 10. IOUT 80 mA vs. VIN

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  • Figure 11. IOUT 800 mA vs. VIN

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  • Figure 12. Efficiency vs. VIN

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  • Figure 13. Efficiency vs. VIN, IO = 400 mA

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  • Figure 14. Line transient

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• 11 External component selection

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  • 11.1 Input and output capacitor selection

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  • 11.2 Inductor selection

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  • 11.3 LED selection

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  • 11.4 RHC selection

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  • 11.5 RLC selection

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  • 11.6 NTC and RX resistor selection

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• 12 Package mechanical data

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• 13 Revision history

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  • Table 7. Document revision history

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