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LP8754 bảng dữ liệu(PDF) 29 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  LP8754 Multi-Phase Six-Core Step-Down Converter
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LP8754 bảng dữ liệu(HTML) 29 Page - Texas Instruments

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LP8754
www.ti.com
SNVS861A – FEBRUARY 2014 – REVISED AUGUST 2014
7.6.2 VSET_B0
Address: 0x00
D7
D6
D5
D4
D3
D2
D1
D0
EN_DIS_B0
VSET_B0[6:0]
Bits
Field
Type
Default
Description
7
EN_DIS_B0
R/W
1
DC/DC converter Buck0 Enable/Disable. The Enable of the master Buck0 controls the
operation of the slave bucks.
0 = Converter disabled
1 = Converter enabled
Note: When a disable request is received the converter is disabled immediately.
6:0
VSET_B0[6:0]
R/W
011 1100
Sets the output voltage.
Defined by:
VOUT = 0.5 V + 10 mV * VSET_B0
VOUT range = 0.6 V to 1.67 V
NOTE: Do not use VSET_B0 values < 0001010 (10 dec) = 0.6 V.
NOTE: Register settings starting from 1110110 up to 1111111 are clamped to 1.67 V.
7.6.3 FPWM
Address: 0x06
D7
D6
D5
D4
D3
D2
D1
D0
Reserved
FPWM_B0
Bits
Field
Type
Default
Description
7:1
Reserved
R/W
001 1111
0
FPWM_B0
R/W
1
Forced PWM mode of operation, Buck regulator 0 (Master). The setting of the master
controls the operation of the slave bucks.
0 = PWM, PFM or Low-Power PFM operation mode.
1 = This will force the master converter and the slaves to operate always in the PWM
mode.
7.6.4 BUCK0_CTRL
Address: 0x07
D7
D6
D5
D4
D3
D2
D1
D0
OC_LEV_B0[1:0]
LP_B0
RDIS_B0
Reserved
RAMP_B0[2:0]
Bits
Field
Type
Default
Description
7:6
OC_LEV_B0[1:0]
R/W
10
Inductor positive current limit on Buck 0. Note that OC_LEV_B0...B5 should have the
same value.
00 = 1.5 A
01 = 2.0 A
10 = 2.5 A
11 = 3.0 A
5
LP_B0
R/W
0
Allows converter to enter into Low-Power PFM mode.
1 = Entering to Low-Power PFM mode is allowed.
0 = Entering to Low-Power PFM more is not allowed.
4
RDIS_B0
R/W
1
Enables the output discharge resistors when the VOUT supply has been disabled.
1 = Enable pull-down
0 = Disable pull-down
3
Reserved
R/W
0
Copyright © 2014, Texas Instruments Incorporated
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Product Folder Links: LP8754



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