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| 型号： | TPS65530RSLRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.3 A SWITCHING REGULATOR, 1650 kHz SWITCHING FREQ-MAX, PQCC48 |
| 封装： | 6 X 6 MM, 0.40 MM PITCH, GREEN, PLASTIC, QFN-48 |
| 文件页数： | 3/31页 |
| 文件大小： | 931K |
| 代理商： | TPS65530RSLRG4 |
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FUNCTIONAL DESCRIPTION
Logic True Table
Power ON/OFF Sequence
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
–
OFF
2
H
L
ON
OFF
PWM
ON
3
H
L
H
ON
OFF
ON
PWM
ON
4
H
L
H
L
ON
OFF
ON
OFF
PWM
ON
5
H
L
H
ON
OFF
ON
PWM
ON
6
H
L
ON
OFF
PWM
ON
7
H
L
H
ON
OFF
ON
PWM
ON
8
H
L
ON
OFF
PWM
ON
9
H
ON
PWM
ON
10(2)
L
H
–
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
11
Product Folder Link(s): TPS65530
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