CONFIDENTIAL

[AP2061]

Rev. 0.1

- 22 -

2012/10

SYSTEM DESIGN

LED1

LED2

TORCH

NTC

VOUT

VOUT

TXON

SDA

SW1

SW2

STROBE

SCL

PGND

PGND

VSS

VIN

LED1

LED2

VIN

VIN

VIN

VIN

GND

GND

GND

GND

TORCH

NTC

TXON

SDA SCL

STROBE

4.6mm

4.5mm

Please connect NTC pin, TROCH

pin, TXON pin, STROBE pin to

GND, if these pins are not used.

Inductor

(2520)

Cout

Cin

The example of recommended external parts (LED1=LED2=800mA, VIN=3.0~4.5V, VOUT<4.5V)

項目

項目

項目

項目

記号

記号

記号

記号

定数

定数

定数

定数

Typ

Typ

Typ

Type(

e(

e(

e(例

例

例

例))))

寸法

寸法

寸法

寸法

メーカ

メーカ

メーカ

メーカ

DFE252010C

DC RES=45mohm

2.5 x 2.0 x 1.2 mm

TOKO

LQH44PN1R0NP0

DC=30mohm

3.7 x 4.0 x 1.8mm

Murata

Inductor

L

1uH

VLF4014ST-1R0N2R3

DC=50mohm

3.8 x 3.6 x 1.4mm

TDK

GRM188B30J475KE18 (6.3V)

1.6 x 0.8 mm

Murata

Condenser

Cin

Cout

4.7uF

C1608JB0J475K, C1608JB0J475M

C1608X5R0J475K, C1608X5R0J475M

3.5uF @3.7V, 2.8uF @5V

1.6 x 0.8 mm

TDK

NTC抵抗

150k

220k

470k

NCP15WM154 (B constant=4614)

NCP15WM224 (B constant=4614)

NCP15WM474 (B constant=4614)

1.0×0.5 mm

Murata

Table 9. Recommend external parts example

Note:

- PGND and VSS shall be connected to the same ground plane.

- Inductor shall be placed as close as possible to the chip.

- Capacitors shall be placed as close as possible to the chip.

- Low ESR (Equivalent Series Resistance) capacitors are recommended.