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TPS65530RSLR Datasheet(PDF) 11 Page - Texas Instruments |
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TPS65530RSLR Datasheet(HTML) 11 Page - Texas Instruments |
11 / 28 page FUNCTIONAL DESCRIPTION Logic True Table Power ON/OFF Sequence TPS65530 www.ti.com....................................................................................................................................................... SLVS744C – OCTOBER 2007 – REVISED MAY 2008 The enable/disable of each channel is controlled by logic input signals level at XSLEEP (pin 7 for all channels), ENAFE (pin 6 for CH4), EN56 (pin 46 for CH5/6) and EN7 (pin 8 for CH7). Table 1 is the summary of the enable/disable mode. Table 1. Control Pin vs Enable/Disable NO. OF XSLEEP ENAFE EN56 EN7 CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8(1) LDO STATE 1 L L – – OFF OFF OFF OFF OFF OFF OFF OFF OFF 2 H L L L ON ON ON OFF OFF OFF OFF PWM ON 3 H L L H ON ON ON OFF OFF OFF ON PWM ON 4 H L H L ON ON ON OFF ON ON OFF PWM ON 5 H L H H ON ON ON OFF ON ON ON PWM ON 6 H H L L ON ON ON ON OFF OFF OFF PWM ON 7 H H L H ON ON ON ON OFF OFF ON PWM ON 8 H H H L ON ON ON ON ON ON OFF PWM ON 9 H H H H ON ON ON ON ON ON ON PWM ON 10(2) L H – – OFF OFF OFF OFF OFF OFF OFF PFM OFF (1) PWM = pulse width modulation, PFM = pulse frequency modulation (2) State 10 (CH8: PFM mode) must go through State 2. This device has the power ON/OFF sequence of CH1/2/3/8/REF and CH5/6 for DSC application. The CH1/2/3/8/REF sequence is shown in Figure 1. The CH5/6 sequence is shown in Figure 2. CH4 and CH7 have individual sequences but CH4–6 has the subordinate relationship with CH1–3 because the slope of soft start is the same and puts high priority of CH1–3 to avoid the functional conflict (see the Soft Start description). Due to this, CH4–6 should not be ON before CH1–3 is ON. When XSLEEP is forced low, all channels turn OFF with the power OFF sequence. Figure 1. CH1/CH2/CH3/CH8/REF Power ON/OFF Sequence Copyright © 2007–2008, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): TPS65530 |
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