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LM3492HCMH 데이터시트(PDF) 4 Page - Texas Instruments |
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LM3492HCMH 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 29 page LM3492HC-Q1, LM3492HC SNVS797B – MARCH 2012 – REVISED OCTOBER 2015 www.ti.com Pin Functions (continued) PIN TYPE(1) DESCRIPTION NAME NO. Current regulator ground. Must be connected to the GND pin and exposed pad for normal operation. LGND 14 G The LGND and GND pins are not internally connected. 17 Integrated MOSFET ground. Must be connected to the GND pin and exposed pad for normal PGND G operation. The PGND and GND pins are not internally connected. 18 Frequency control pin. An external resistor from the VOUT pin to this pin sets the switching RT 6 I frequency. 3 SW I Switch node. Internally connected to the drain of the integrated MOSFET. 4 Internal LED regulator output. Nominally regulated to 5.5 V. Connect a capacitor of 0.47- μF or larger VCC 19 O between the VCC and GND pins. VIN 2 I Input supply voltage pin. Input voltage range is from 4.5 V to 65 V. VOUT 5 I Output voltage sense pin. Senses the output voltage for nearly constant switching frequency control. Exposed Pad G Thermal connection pad. Connect to a ground plane. 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT VIN, RT, VOUT to GND, SW to GND −0.3 67 Input voltage V SW to GND (transient <100 ns) −2 ILIM to GND −0.3 1 Output voltage FB to GND −0.3 5 V COMM, DIM1, DIM2, to GND −0.3 6 Junction temperature, TJ 150 °C Storage temperature, Tstg –65 150 (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. 7.2 ESD Ratings VALUE UNIT Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V(ESD) Electrostatic discharge V Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±750 (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Pins listed as ±2000 V may actually have higher performance. (2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Pins listed as ±750 V may actually have higher performance. 7.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN NOM MAX UNIT Supply input voltage, VIN 4.5 65 V Junction temperature, TJ −40 125 °C 4 Submit Documentation Feedback Copyright © 2012–2015, Texas Instruments Incorporated Product Folder Links: LM3492HC-Q1 LM3492HC |
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