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ADD5207 데이터시트(PDF) 8 Page - Analog Devices |
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ADD5207 데이터시트(HTML) 8 Page - Analog Devices |
8 / 16 page ADD5207 Data Sheet Rev. A | Page 8 of 16 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TOP VIEW (Not to Scale) OVP SW SHDN PWM FSLCT VIN ISET FB1 FB2 FB3 14 13 GND 12 COMP 11 10 9 VDD 8 6 5 4 2 3 1 FB4 NOTES 1. CONNECT THE EXPOSED PADDLE TO GROUND. 7 ADD5207 Figure 3. Pin Configuration Table 6. Pin Function Descriptions Pin No. Mnemonic Description 1 VIN Supply Input. Must be locally bypassed with a capacitor to ground. 2 FSLCT Frequency Select. A resistor from this pin to ground sets the boost switching frequency from 600 kHz to 1 MHz. 3 ISET Full-Scale LED Current Set. A resistor from this pin to ground sets the LED current up to 25 mA. 4 FB1 Regulated Current Sink. Connect the bottom cathode of the LED string to this pin. 5 FB2 Regulated Current Sink. Connect the bottom cathode of the LED string to this pin. 6 FB3 Regulated Current Sink. Connect the bottom cathode of the LED string to this pin. 7 FB4 Regulated Current Sink. Connect the bottom cathode of the LED string to this pin. If unused, connect FB4 to GND. 8 VDD Internal Linear Regulator Output. This regulator provides power to the ADD5207. 9 PWM PWM Signal Input. 10 SHDN Shutdown Control for PWM Input Operation Mode. Active low. 11 COMP Compensation for the Boost Converter. Two capacitors and a resistor are connected in series between ground and this pin for stable operation. 12 GND Ground. 13 OVP Overvoltage Protection. The boost converter output is connected to this pin directly. 14 SW Drain Connection of the Internal Power FET. EP Exposed Paddle. Connect the exposed paddle to ground. |
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