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LM3423 数据表(PDF) 4 Page - Texas Instruments |
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LM3423 数据表(HTML) 4 Page - Texas Instruments |
4 / 72 page LM3421, LM3421-Q1, LM3423, LM3423-Q1 SNVS574F – JULY 2008 – REVISED JULY 2015 www.ti.com Pin Functions (continued) PIN I/O DESCRIPTION FUNCTION NAME LM3423 LM3421 Connect to the drain of the main N-channel MOSFET switch IS 17 13 I Main switch current sense for RDS-ON sensing or to a sense resistor installed in the source of the same device. Connect the low side of all external resistor dividers (VIN RPD 18 14 I Resistor Pulldown UVLO, OVP) to implement zero-current shutdown. LED current sense Connect through a series resistor to the positive side of the HSP 19 15 I positive LED current sense resistor. LED current sense Connect through a series resistor to the negative side of the HSN 20 16 I negative LED current sense resistor. Thermal PAD on bottom Star ground, connecting AGND and PGND. DAP DAP (21) DAP (17) GND of IC 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) (2) MIN MAX UNIT VIN, EN, RPD, nDIM –0.3 76 V –1 continuous mA OVP, HSP, HSN, LRDY, FLT, DPOL –0.3 76 V –100 continuous µA RCT –0.3 76 V –1 continuous 5 continuous mA IS –0.3 76 V –2 for 100 ns –1 continuous mA VCC –0.3 8 V TIMR –0.3 7 V –100 continuous 100 continuous µA COMP, CSH –0.3 6 V –200 continuous 200 continuous µA GATE, DDRV –0.3 VCC V –2.5 for 100 ns VCC+ 2.5 for 100 ns –1 continuous 1 continuous mA PGND –0.3 0.3 V –2.5 for 100 ns 2.5 for 100 ns Continuous power dissipation Internally Limited Maximum junction temperature Internally Limited Maximum lead temperature (solder and reflow) (3) 260 °C Storage temperature –65 150 °C (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) If Military/Aerospace specified devices are required, contact the Texas Instruments Sales Office/Distributors for availability and specifications. (3) Refer to http://www.ti.com/packaging for more detailed information and mounting techniques. 4 Submit Documentation Feedback Copyright © 2008–2015, Texas Instruments Incorporated Product Folder Links: LM3421 LM3421-Q1 LM3423 LM3423-Q1 |
类似零件编号 - LM3423 |
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类似说明 - LM3423 |
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