Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

RT9719 Datasheet(PDF) 8 Page - Richtek Technology Corporation

Part No. RT9719
Description  Charging System Safety Device
Download  10 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  RICHTEK [Richtek Technology Corporation]
Homepage  http://www.richtek.com
Logo 

RT9719 Datasheet(HTML) 8 Page - Richtek Technology Corporation

 
Zoom Inzoom in Zoom Outzoom out
 8 / 10 page
background image
RT9719
8
DS9719-01 April 2011
www.richtek.com
Figure 3. Derating Curves for RT9719 Packages
Layout Consideration
The RT9719 is a protection device. Careful PCB layout is
necessary. For best performance, place all peripheral
components as close to the IC as possible. A short
connection is highly recommended. The following
guidelines should be strictly followed when designing a
PCB layout for the RT9719.
The exposed pad, GND must be soldered to a large
ground plane for heat sinking and noise prevention. The
through-hole vias located at the exposed pad is
connected to ground plane of internal layer.
ACIN traces should be wide to minimize inductance and
handle the high currents. The trace running from input
to chip should be placed carefully and shielded strictly.
The capacitors must be placed close to the part. The
connection between pins and capacitor pads should be
copper traces without any through-hole via connection.
Figure 4. PCB Layout Guide
ACIN
ACIN
ISENSE
ISENSE
CHRIN
ACIN
GND
7
6
5
1
2
3
4
8
9
GATEDRV
To Battery
To Baseband
Gate Controller
Input capacitor must be
placed between GND
and ACIN to reduce
noise.
The capacitor must be
placed between GND
and ACIN to reduce
noise.
The exposed pad,
GND must be soldered
to a large ground plane
for heat sinking and
noise prevention.
From Adapter
To Baseband
Charger Controller
CIN
GND
To Battery
NC
GND
ACIN
GATEDRV
CHRIN
ISENSE
4
2
3
5
6
To Baseband
Gate Controller
The capacitor
must be placed
between GND
and ACIN to
reduce noise.
To Baseband Charger Controller
From Adapter
Input capacitor must be
placed between GND
and ACIN to reduce
noise.
CIN
GND
The exposed pad,
GND must be soldered
to a large ground
plane for heat sinking
and noise prevention.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
25
50
75
100
125
Ambient Temperature (°C)
SOT-23-6
WDFN-8L 2x2
Four Layouts PCB
junction to ambient. The maximum power dissipation can
be calculated by following formula :
PD(MAX) = ( TJ(MAX)
− TA ) / θJA
Where TJ(MAX) is the maximum operation junction
temperature, TA is the ambient temperature and the
θJA is
the junction to ambient thermal resistance.
For recommended operating conditions specification of
RT9719, where TJ(MAX) is 125
°C and TA is the operated
ambient temperature. The junction to ambient thermal
resistance
θJA for WDFN-8L 2x2 package is 165°C/W and
SOT-23-6 package is 250
°C/W on the standard JEDEC
51-3 single-layer thermal test board. The maximum power
dissipation at TA = 25
°C can be calculated by following
formula :
PD(MAX) = (125
°C − 25°C) / (165°C/W) = 0.606 W for
WDFN-8L 2x2 packages
PD(MAX) = (125
°C − 25°C) / (250°C/W) = 0.400 W for
SOT-23-6 packages
The maximum power dissipation depends on operating
ambient temperature for fixed TJ(MAX) and thermal
resistance
θJA . For RT9719 packages, the Figure 3 of
derating curves allows the designer to see the effect of
rising ambient temperature on the maximum power
allowed.


Html Pages

1  2  3  4  5  6  7  8  9  10 


Datasheet Download




Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   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