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AS1109-BSST Datasheet(PDF) 3 Page - ams AG |
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AS1109-BSST Datasheet(HTML) 3 Page - ams AG |
3 / 25 page www.ams.com/LED-Driver-ICs/AS1109 Revision 1.21 2 - 24 AS1109 Datasheet 4 Pin Assignments Figure 2. Pin Assignments (Top View) 4.1 Pin Descriptions Table 1. Pin Descriptions Pin Number Pin Name Description 16-pin QSOP-150 16-pin SOIC-150 16-pin QFN (4x4mm) 115 GND Ground 216 SDI Serial Data Input 31 CLK Serial Data Clock. The rising edge of the CLK signal is used to clock data into and at the falling edge out of the AS1109 shift register. In error mode, the rising edge of the CLK signal is used to switch error modes. 42 LD Serial Data Load. Data is transferred to the data register at the rising edge of this pin. 5:12 3:10 OUTN0:7 Output Current Drivers. These pins are used as LED drivers or for input sense for diagnostic modes. 13 11 OEN Output Enable. The active-low pin OEN signal can always enable output drivers to sink current independent of the AS1109 mode. 0 = Output drivers are enabled. 1 = Output drivers are disabled. 14 12 SDO Serial Data Output. In normal mode SDO is clocked out 8.5 clock cycles after SDI is clocked in. In global error detection mode this pin indicates the occurrence of a global error. 0 = Global error mode returned an error. 1 = No errors. 15 13 REXT External Resistor Connection. This pin connects through the external resistor (REXT) to GND, to setup the load current. 16 14 VDD Positive Supply Voltage 1 GND AS1109 16 VDD 2 SDI 3 CLK 4 LD 5 OUTN0 15 REXT 14 SDO 13 OEN 9 OUTN4 8 OUTN3 7 OUTN2 6 OUTN1 12 OUTN7 11 OUTN6 10 OUTN5 SDO GND VDD REXT 13 6 12 OUTN7 10 5 14 15 CLK 1 LD 2 OUTN1 4 AS1109 16-pin QFN (4x4mm) OUTN0 3 7 8 OUTN6 9 OEN 11 SDI 16 16-pin QSOP-150 16-pin SOIC-150 |
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