RT9516 查看數據表（PDF） - Richtek Technology

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产品描述 (功能)

比赛名单

RT9516

Linear Single Cell Li-lon Battery Charger with Single Input Supply for Portable Applications

Richtek Technology 

RT9516

The maximum power dissipation at TA = 25°C can be

calculated by following formula :

PD(MAX) = (125°C− 25°C) / (165°C /W) = 0.606W for

WDFN-8L 2x2 package

The maximum power dissipation depends on operating

ambient temperature for fixed TJ(MAX) and thermal

resistance θJA. For RT9516 package, the Figure 4 of

derating curves allows the designer to see the effect of

rising ambient temperature on the maximum power

allowed.

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.0

0

Single Layer PCB

WDFN-8L 2x2

25

50

75

100

125

Ambient Temperature (°C)

Figure 4. Derating Curves for RT9516 Package

Layout Consideration

The RT9516 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 should be strictly followed when

designing a PCB layout for the RT9516.

` Input 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

or 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 RSET should be isolated 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.

GND

The capacitor should be

placed close to IC pin

and connected to ground

plane.

VIN 1

CIN

GND 2

RSET ISET 3

ABI 4

8 BATT

7 PGOOD

6 EN

9 5 ABO

COUT

The connection of resistor should be

isolated from other noisy traces. The GND should be connected to

The short wire is recommended to a strong ground plane for heat

prevent EMI and noise coupling. sinking and noise protection. GND

Figure 5. PCB Layout Guide

www.richtek.com

10

DS9516-01 April 2011

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