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LP8550TLX/NOPB 数据表(PDF) 4 Page - Texas Instruments |
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LP8550TLX/NOPB 数据表(HTML) 4 Page - Texas Instruments |
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4 / 49 page  GND SW GND SW EN PWM FB SW SW ISET FSET GND_S VIN FILTER FAULT VDDIO OUT3 VLDO VSYNC SCLK SDA OUT2 OUT6 OUT5 OUT4 GND_L OUT1 A B C D E 1 2 3 4 5 GND SW GND SW EN PWM FB SW SW ISET FSET GND_S VIN FILTER FAULT VDDIO OUT3 VLDO VSYNC SCLK SDA OUT2 OUT6 OUT5 OUT4 GND_L OUT1 A B C D E 1 2 3 4 5 LP8550 SNVS657E – SEPTEMBER 2010 – REVISED SEPTEMBER 2014 www.ti.com 6 Pin Configuration and Functions 25 25 DSBGA (YZR) DSBGA (YZR) Top View Bottom View Pin Functions PIN TYPE(1) DESCRIPTION NUMBER NAME A1 GND_SW G Boost switch ground A2 GND_SW G Boost switch ground A3 EN I Enable input pin A4 PWM A PWM dimming input. This pin must be connected to GND if not used. A5 FB A Boost feedback input B1 SW A Boost switch B2 SW A Boost switch B3 ISET A Set resistor for LED current. This pin can be left floating if not used. B4 FSET A PWM frequency set resistor. This pin can be left floating if not used. B5 GND_S G Signal ground C1 VIN P Input power supply up to 22 V. If 2.7 V ≤ VBATT < 5.5 V (Figure 31) then external 5-V rail must be used for VLDO and VIN. C2 FILTER A Low pass filter for PLL. This pin can be left floating if not used. C3 FAULT OD Fault indication output. If not used, can be left floating. C4 VDDIO P Digital IO reference voltage (1.65 V to 5 V) for I2C interface. If brightness is controlled with PWM input pin then this pin can be connected to GND. C5 OUT3 A Current sink output D1 VLDO P LDO output voltage. External 5-V rail can be connected to this pin in low voltage application. D2 VSYNC I VSYNC input. This pin must be connected to GND if not used. D3 SCLK I Serial clock. This pin must be connected to GND if not used. D4 SDA I/O Serial data. This pin must be connected to GND if not used. D5 OUT2 A Current sink output E1 OUT6 A Current sink output E2 OUT5 A Current sink output E3 OUT4 A Current sink output E4 GND_L G LED ground E5 OUT1 A Current sink output (1) A: Analog Pin, G: Ground Pin, P: Power Pin, I: Input Pin, I/O: Input/Output Pin, O: Output Pin, OD: Open Drain Pin 4 Submit Documentation Feedback Copyright © 2010–2014, Texas Instruments Incorporated Product Folder Links: LP8550 |
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