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LM10000 データシート(PDF) 11 Page - Texas Instruments

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部品番号 LM10000
部品情報  AVS System Controller
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
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LM10000 データシート(HTML) 11 Page - Texas Instruments

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Slave DC/DC
FB
VOUT
LM10000
IAVS
RFB1
RFB2
VOUT = VFB x 1 +
- IAVS x RFB1
RFB1
¹
·
©
§
RFB2
Slave
Regulator
ASIC
VDD
RTN
(Non AVS)
IAVS
CNTL_EN
SPWI
SCLK
AVS
APC2
PWI 2.0
FB
FLTN
CONTROL
RESETN
EN_BIAS
Logic inputs for Vout
sequencing control
LM10000
Logic output for enabling
slave regulator
System
uC
LM10000
www.ti.com
SNVS643C – JUNE 2010 – REVISED APRIL 2013
Figure 7. LM10000 provides flexible digital power management via multi-master PWI 2.0, and flexible
VOUT sequencing control
IAVS OUTPUT CURRENT: CONTROLLING THE OUTPUT VOLTAGE
The LM10000 uses a 7-bit current DAC to control the output voltage of a slave power regulator. Since it is a
current output, IAVS can be connected directly to the feedback node of the slave power regulator. IAVS has a
range of 0 – 60 µA with 7 bits of resolution, or a 0.469 µA LSB.
A typical connection of the IAVS injection current into a slave regulator is shown in Figure 8. The output voltage
VOUT is expressed as:
(1)
Where VFB = the regulated feedback voltage of the slave regulator. This equation is valid for VOUT > VFB.
Figure 8. IAVS Injection Current Into A Slave Regulator
Copyright © 2010–2013, Texas Instruments Incorporated
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