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ADD5207 Arkusz danych(PDF) 5 Page - Analog Devices |
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ADD5207 Arkusz danych(HTML) 5 Page - Analog Devices |
5 / 16 page Data Sheet ADD5207 Rev. A | Page 5 of 16 LED CURRENT REGULATION SPECIFICATIONS VIN = 12 V, SHDN = high, TA = −25°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. Table 2. Parameter Symbol Test Conditions/Comments Min Typ Max Unit CURRENT SOURCE ISET Pin Voltage VSET 6 V ≤ VIN ≤ 21 V 1.14 1.18 1.22 V Adjustable LED Current1 ILED 0 25 mA Constant Current Sink of 20 mA2 ILED20 RSET = 180 kΩ 19.4 20 20.6 mA Minimum Headroom Voltage2 VHR20 RSET = 180 kΩ 0.66 0.9 V Current Matching Between Strings2 RSET = 180 kΩ −1.5 +1.5 % LED Current Accuracy2 RSET = 180 kΩ −3 +3 % Current Source Leakage Current 1 µA FPWM GENERATOR Dimming Frequency fPWM 6.8 8.0 9.2 kHz LED FAULT DETECTION Open Fault Delay1 tD_OPENFAULT 6.5 µs 1 This electrical specification is guaranteed by design. 2 Tested at TA = +25°C. |
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