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LM3488QMM Fiches technique(PDF) 2 Page - Texas Instruments |
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LM3488QMM Fiches technique(HTML) 2 Page - Texas Instruments |
2 / 33 page LM3488 LM3488-Q1 SNVS089M – JULY 2000 – REVISED MARCH 2013 www.ti.com Connection Diagram Figure 2. 8-Lead VSSOP Package PIN DESCRIPTIONS Pin Name Pin Description No. ISEN 1 Current sense input pin. Voltage generated across an external sense resistor is fed into this pin. COMP 2 Compensation pin. A resistor, capacitor combination connected to this pin provides compensation for the control loop. FB 3 Feedback pin. The output voltage should be adjusted using a resistor divider to provide 1.26V at this pin. AGND 4 Analog ground pin. PGND 5 Power ground pin. DR 6 Drive pin of the IC. The gate of the external MOSFET should be connected to this pin. FA/SYNC/SD 7 Frequency adjust, synchronization, and Shutdown pin. A resistor connected to this pin sets the oscillator 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 ≥ 30µs will turn the device off. The device will then draw less than 10µA from the supply. VIN 8 Power supply input pin. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. Absolute Maximum Ratings (1) Input Voltage 45V FB Pin Voltage -0.4V < VFB < 7V FA/SYNC/SD Pin Voltage -0.4V < VFA/SYNC/SD < 7V Peak Driver Output Current (<10µs) 1.0A Power Dissipation Internally Limited Storage Temperature Range −65°C to +150°C Junction Temperature +150°C ESD Susceptibilty Human Body Model(2) 2kV Lead Temperature Vapor Phase (60 sec.) 215°C Infared (15 sec.) 260°C DR Pin Voltage −0.4V ≤ VDR ≤ 8V ILIM Pin Voltage 600mV (1) Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics. (2) The human body model is a 100 pF capacitor discharged through a 1.5k Ω resistor into each pin. 2 Submit Documentation Feedback Copyright © 2000–2013, Texas Instruments Incorporated Product Folder Links: LM3488 LM3488-Q1 |
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