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TPS92602-Q1 Datasheet(PDF) 10 Page - Texas Instruments |
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TPS92602-Q1 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 45 page ROVFB_B + ± + ± + ± + ± + ± + ROVFB_A RSNS RLED_SNS ROSC RZ CZ CP C CVCC + V(BAT) PWMIN ICTRL COMP RT DIAG TPS9260x-Q1 VDD VCC VIN UVLO LDO Int. FET Voltage Monitor TJ Shutdown Shutdown Logic VCC CLRZ CLRZ QZ D CLK Slope Compensation Over- current Detect 100 mV 2.2 V 0.75 V Soft- start MP D L LED OVFB ISNS GDRV PWMO VOUT ISN ISP GND PGND Osc or PLL Q & LDO Int. FET 1 TPS92601-Q1, TPS92602-Q1, TPS92601A-Q1, TPS92602A-Q1 SLUSBP5D – MARCH 2014 – REVISED JANUARY 2015 www.ti.com 8 Detailed Description 8.1 Overview The TPS92602-Q1 device is a dual-channel LED driver. The base of each independent driver is a peak-current- mode boost controller. The two boost controllers operate 180° out-of-phase in order to reduce ripple currents and radiation. Each controller is independently configurable to regulate the output current (the typical case for driving LEDs) or to regulate the output voltage. Depending on the chosen configuration for each channel, one loop is active while the other loop only acts in case of a failure condition. In a constant-current application, the inactive voltage loop sets the maximum output-voltage limit (and hence becomes active in case of output overvoltage due to an open LED). In constant-voltage applications, the inactive current loop sets the maximum output current limit (and hence becomes active in case of output overcurrent because of an LED short to ground). The TPS92601-Q1 device is a single-channel version of the TPS92602-Q1 device. Both devices have the same functions. 8.2 Functional Block Diagram Figure 9. Block Diagram, TPS9260x-Q1 in Boost-To-Battery Configuration 10 Submit Documentation Feedback Copyright © 2014–2015, Texas Instruments Incorporated Product Folder Links: TPS92601-Q1 TPS92602-Q1 TPS92601A-Q1 TPS92602A-Q1 |
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