The TPS92411 is a 100-V floating MOSFET switch for use in offline LED lighting applications. The device is used in conjunction with a current regulator that can achieve a power factor greater than 0.9 to create a LED drive solution with low-ripple current. When properly designed, solution performance is comparable to traditional flyback, buck or boost-based AC/DC LED drivers. The approach requires no inductive components, thus saving size and cost. Slew-controlled low-frequency operation of the TPS92411 switches creates very little EMI. Detailed operation is described in the Application Information section.
Package options include SOT23-5 and PSOP-8 allowing the user to optimize for small size or scale for high power. Using the PSOP-8 package, design of LED luminaires up to 70 W or more is possible. Other features include a UVLO circuit to monitor when the device has sufficient voltage to operate properly and over-voltage protection (TPS92411P).
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS92411, TPS92411P | SOT-23 (5) | 2.90 mm x 1.60 mm |
SO PowerPAD (8) | 4.89 mm x 3.90 mm |
Changes from A Revision (May 2014) to B Revision
Changes from * Revision (October 2013) to A Revision
PIN | I/O | DESCRIPTION | ||
---|---|---|---|---|
NAME | NO. | |||
DDA | DBV | |||
DRAIN | 8 | 4 | O | Drain of the internal switch. |
N/C | 2 | — | — | Not internally connected. |
N/C | 6 | |||
N/C | 7 | |||
VIN | 1 | 3 | I | Positive power supply for the device. |
VS | 4 | 2 | I/O | Source of the internal switch. This pin is also the device floating ground. |
RSET | 3 | 1 | I/O | A resistor connected between the RSET pin and the VIN pin sets the rising threshold to open the switch. |
RSNS | 5 | 5 | I/O | A resistor connected between the RSNS pin to system ground senses the VS voltage relative to system ground. |
Exposed Themal Pad | Connect to VS pin directly beneath the device. |