RT9527 RICHTEK [Richtek Technology Corporation], RT9527 Datasheet - Page 12

• Manufacturer Part Number: RT9527
• Description: Single Cell Li-Ion Battery Charger with Adjustable Charging Current for Portable Applications
• Manufacturer: RICHTEK [Richtek Technology Corporation]

RT9527
Copyright
www.richtek.com
12
Figure 1. Derating Curve of Maximum Power Dissipation
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0.1
0.0
©
2012 Richtek Technology Corporation. All rights reserved.
0
25
Ambient Temperature (°C)
50
Place C
improve performance.
GND should be connected to a
strong ground plane for heat
sinking and noise protection.
75
GND
GND
R2
IN
Four-Layer PCB
near the IC to
R1
PGOOD
100
Figure 2. PCB Layout Guide
CHG
GND
VIN
C
IN
1
2
3
4
125
9
8
7
6
5
Connect the Exposed
Pad to a ground plane.
R
The R
should be minimized and kept far
away from noise sources.
C
BAT
TS
TIMER
ISET
Layout Considerations
The RT9527 is a fully integrated low cost single cell Li-Ion
battery charger ideal for portable applications. 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 must be strictly followed when designing a PCB
layout for the RT9527.
ISET
OUT
Input and output capacitor should be placed close to IC
and connected to ground plane. The trace of input in the
PCB should be placed far away from the sensitive devices
and shielded by the ground.
The GND and exposed pad should be connected to a
strong ground plane for heat sinking and noise protection.
The connection of R
noisy traces. A short wire is recommended to prevent
EMI and noise coupling.
ISET
is a registered trademark of Richtek Technology Corporation.
C
connection copper area
VIN
TIMER
R
R
T1
T2
ISET
should be isolated from other
DS9527-00 May 2012