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LM3488MMX データシート(PDF) 3 Page - Texas Instruments |
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LM3488MMX データシート(HTML) 3 Page - Texas Instruments |
3 / 37 page LM3488, LM3488-Q1 www.ti.com SNVS089N – JULY 2000 – REVISED DECEMBER 2014 5 Pin Configuration and Functions 8-Pin DGK VSSOP Package Top View Pin Functions PIN TYPE DESCRIPTION NAME NO. ISEN 1 I Current sense input pin. Voltage generated across an external sense resistor is fed into this pin. COMP 2 A Compensation pin. A resistor, capacitor combination connected to this pin provides compensation for the control loop. FB 3 I Feedback pin. The output voltage should be adjusted using a resistor divider to provide 1.26 V at this pin. AGND 4 P Analog ground pin. PGND 5 P Power ground pin. DR 6 O Drive pin of the IC. The gate of the external MOSFET should be connected to this pin. FA/SYNC/S 7 A Frequency adjust, synchronization, and Shutdown pin. A resistor connected to this pin sets the oscillator D frequency. An external clock signal at this pin will synchronize the controller to the frequency of the clock. A high level on this pin for ≥ 30 µs will turn the device off. The device will then draw less than 10µA from the supply. VIN 8 P Power supply input pin. 6 Specifications 6.1 Absolute Maximum Ratings (1) MIN MAX UNIT Input voltage 45 V FB pin voltage –0.4 < VFB VFB < 7 V FA/SYNC/SD pin voltage –0.4 < VFA/SYNC/SD VFA/SYNC/SD < 7 V Peak driver output current (< 10 µs) 1 A Power dissipation Internally Limited Junction temperature 150 °C Lead temperature Vapor Phase (60 s) 215 °C Infared (15 s) 260 °C DR pin voltage −0.4 ≤ VDR VDR ≤ 8 V ILIM pin voltage 600 mV (1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Recommended Operating Conditions are conditions under which operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics. Copyright © 2000–2014, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3488 LM3488-Q1 |
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