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HT7939 Datasheet(PDF) 2 Page - Holtek Semiconductor Inc |
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HT7939 Datasheet(HTML) 2 Page - Holtek Semiconductor Inc |
2 / 13 page Block Diagram Pin Assignment Pin Description Pin No. Pin Name Description 1 SW Switching pin. Internal power MOSFET drain. Connected to inductor and diode. 2 GND Signal Ground. 3FB Feedback pin. Reference voltage. The HT7939 feedback voltage is 200mV. Connect the sense resistor from FB to GND to set the LED current. Calculate resistor value according to R mV I FB LED = 200 . 4EN Shutdown & Dimming control input. Don ¢t allow this pin to float. 5 OVP Over voltage protection pin which is connected to the output. 6 VIN Input supply pin. The input supply pin for the IC. Connect VIN to a supply voltage between 2.6V~5.5V. HT7939 Rev 1.30 2 November 9, 2010 S W G N D T o p V i e w V I N E N F B 1 2 3 4 6 5 O V P S O T 2 3 - 6 32V |
Similar Part No. - HT7939_10 |
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Similar Description - HT7939_10 |
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