RT9524 RICHTEK [Richtek Technology Corporation], RT9524 Datasheet - Page 11

• Manufacturer Part Number: RT9524
• Description: Linear Single Cell Li-Ion Battery Charger IC for Portable Applications
• Manufacturer: RICHTEK [Richtek Technology Corporation]

in Figure 4 allows the designer to see the effect of rising
ambient temperature on the maximum power dissipation.
Layout Consideration
The RT9524 is a fully integrated low cost single-cell Li-
Ion battery charger IC 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 should be strictly followed when designing a
PCB layout for the RT9524.
DS9524-01 April 2011
Input capacitor should be placed close to the IC and
connected to ground plane. The trace of input in the
PCB should be placed far away from the sensitive devices
or shielded by the ground.
The GND should be connected to a strong ground plane
for heat sinking and noise protection.
The connection of R
from other noisy traces. The short wire is recommended
to prevent EMI and noise coupling.
Output capacitor should be placed close to the IC and
connected to ground plane to reduce noise coupling.
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Figure 4. Derating Curve for RT9524 Package
0
25
Ambient Temperature (°C)
ISET
50
and R
IEOC
75
Four-Layer PCB
should be isolated
100
125
The connection of
resistor should be
isolated from other
noisy traces. Short
wire is recommended
to prevent EMI and
noise coupling.
Figure 5. PCB Layout Guide
R
R
ISET
IEOC
The GND should be connected to a strong
ground plane for heat sinking and noise
protection.
C
IN
The capacitor should be
placed close to IC pin and
connected to ground plane.
IEOC
ISET
GND
LDO
VIN
1
2
3
4
5
11
RT9524
10
9
8
7
6
www.richtek.com
BATT
PGB
CHGSB
GND
EN/SET
GND
C
OUT
11