Electronic Components Datasheet Search
  New Zealand  ▼
ALLDATASHEET.CO.NZ

X  

Preview PDF HTML

ISL6316 Datasheet(PDF) 21 Page - Renesas Technology Corp

Part # ISL6316
Description  Enhanced 4-Phase PWM Controller with 6-Bit VID Code Capable of Precision rDS(ON) or DCR Differential Current Sensing for VR10 Application
PDF  30 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

ISL6316 Datasheet(HTML) 21 Page - Renesas Technology Corp

Back Button ISL6316 Datasheet HTML 17Page - Renesas Technology Corp ISL6316 Datasheet HTML 18Page - Renesas Technology Corp ISL6316 Datasheet HTML 19Page - Renesas Technology Corp ISL6316 Datasheet HTML 20Page - Renesas Technology Corp ISL6316 Datasheet HTML 21Page - Renesas Technology Corp ISL6316 Datasheet HTML 22Page - Renesas Technology Corp ISL6316 Datasheet HTML 23Page - Renesas Technology Corp ISL6316 Datasheet HTML 24Page - Renesas Technology Corp ISL6316 Datasheet HTML 25Page - Renesas Technology Corp Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 30 page
background image
ISL6316
FN9227 Rev 1.00
Page 21 of 30
Dec 12, 2006
The NTC resistance at the set point T2 and release point T1
of VR_FAN signal can be calculated as:
With the NTC resistance value obtained from Equations17
and 18, the temperature value T2 and T1 can be found from
the NTC datasheet.
Temperature Compensation
ISL6316 supports inductor DCR sensing, MOSFET rDS(ON)
sensing, or resistive sensing techniques. Both inductor DCR
and MSOFET rDS(ON) have the positive temperature
coefficient, which is about +0.38%/°C. Because the voltage
across inductor or MOSFET is sensed for the output current
information, the sensed current has the same positive
temperature coefficient as the inductor DCR or MOSFET
rDS(ON).
In order to obtain the correct current information, there should
be a way to correct the temperature impact on the current
sense component. ISL6316 provides two methods: integrated
temperature compensation and external temperature
compensation.
Integrated Temperature Compensation
When TCOMP voltage is equal or greater than VCC/15,
ISL6316 will utilize the voltage at TM and TCOMP pins to
compensate the temperature impact on the sensed current.
The block diagram of this function is shown in Figure 17.
FIGURE 14. BLOCK DIAGRAM OF THERMAL MONITORING
FUNCTION
0.28V
CC
0.33V
CC
oc
R
TM1
R
NTC
VCC
TM
VR_FAN
VR_HOT
FIGURE 15. THE RATIO OF TM VOLTAGE TO NTC
TEMPERATURE WITH RECOMMENDED PARTS
VTM/VCC vs TEMPERATURE
20
30
40
50
60
70
80
90
100
0
20
40
60
80
100
120
140
TEMPERATURE (°)
FIGURE 16. VR_HOT AND VR_FAN SIGNAL vs TM VOLTAGE
TM
VR_FAN
VR_HOT
0.39*VCC
0.33*VCC
0.28*VCC
TEMPERATURE
T1
T2
T3
RNTC T2

1.267xRNTC T3

=
(EQ. 17)
RNTC T1

1.644xRNTC T3

=
(EQ. 18)
FIGURE 17. BLOCK DIAGRAM OF INTEGRATED
TEMPERATURE COMPENSATION
°C
RTM1
RNTC
TM
RTC1
RTC2
TCOMP
NON-LINEAR
A/D
4-BIT
A/D
DROOP AND OVERCURRENT
PROTECTION
I1
I2
I3
I4
KI
D/A
CHANNEL CURRENT
SENSE
ISEN4
ISEN3
ISEN2
ISEN1
VCC
VCC



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com