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TPS40322RHBT Datasheet(PDF) 4 Page - Texas Instruments |
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TPS40322RHBT Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 47 page  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24 23 22 21 20 19 18 17 32 31 30 29 28 27 26 25 SYNC RT EN1/SS1 FB1 COMP1 AGND COMP2 FB2 TPS40322RHB HDRV1 SW1 LDRV1 PGND1 BP6 PGND2 LDRV2 SW2 TPS40322 SLUSAF8E – JULY 2011 – REVISED JANUARY 2016 www.ti.com 5 Pin Configuration and Functions RHB Package 32-Pin VQFN Top View NOTE: In two-phase mode, the EN2/SS2/GSNS pin becomes the GSNS pin and the ILIM2/VSNS pin becomes the VSNS pin. The two channels are identical unless specified otherwise. The following naming conventions are used to better describe the functions. For example, COMPx refers to COMP1 and COMP2, FBx refers to FB1 and FB2. Pin Functions PIN I/O DESCRIPTION NAME PIN AGND 6 — Low noise ground connection to the controller. BOOT1 provides a bootstrapped supply for the high-side FET driver for channel 1 (CH1). Connect a BOOT1 25 I capacitor (0.1 μF typical) from BOOT1 to SW1 pin. BOOT2 provides a bootstrapped supply for the high-side FET driver for channel 2 (CH2). Connect a BOOT2 15 I capacitor (0.1 μF typical) from BOOT2 to SW2 pin. Output bypass for the internal regulator. Connect a low ESR bypass ceramic capacitor with a value of BP6 20 O 3.3 μF or greater from this pin to the power ground plane. COMP1 5 O Output of the error amplifier 1 and connection node for loop feedback components. COMP2 7 O Output of the error amplifier 2 and connection node for loop feedback components. CS1– 29 I Negative terminal of current sense amplifier for CH1 CS1+ 28 I Positive terminal of current sense amplifier for CH1 CS2– 12 I Negative terminal of current sense amplifier for CH2 CS2+ 13 I Positive terminal of current sense amplifier for CH2 Output of the differential amplifier. When the device is configured for dual channel mode, the DIFFO pin DIFFO 9 O must be either floating or tied to BP6 Logic level input which starts or stops CH1. Letting this pin float turns CH1 on. Pulling this pin low disables CH1. This is also the soft-start programming pin. A capacitor connected from this pin to AGND programs EN1/SS1 3 I the soft-start time. The capacitor is charged with an internal current source of 10 μA. The resulting voltage ramp of this pin is also used as a second non-inverting input to the error amplifier 1 after a 0.8 V (typical) level shift downwards. 4 Submit Documentation Feedback Copyright © 2011–2016, Texas Instruments Incorporated Product Folder Links: TPS40322 |
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