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| 型號(hào)： | SM8131B00B |
| 廠商： | Seiko NPC Corporation |
| 英文描述： | The SM8131B is a charge pump DC/DC converter that switches between 1 and 1.5 automatically. |
| 中文描述： | 該SM8131B是一個(gè)電荷泵DC / DC轉(zhuǎn)換器，1至1.5自動(dòng)切換。 |
| 文件頁(yè)數(shù)： | 1/21頁(yè) |
| 文件大?。?/td> | 218K |
| 代理商： | SM8131B00B |
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SM8131B
NIPPON PRECISION CIRCUITS INC.—1
White LED Driver IC
OVERVIEW
The SM8131B is a charge pump DC/DC converter that switches between
SM8131B switches between
×
1 and
×
1.5 according to detected LED drive current, so that the battery life can
be prolonged to the fullest extent. Since the connected LED are all detected for the switching, the SM8131B
can respond to the variation of LED forward voltage. 6-channel of LED drive current control circuit is built-in,
the SM8131B can control 1 to 6 lights of white LED, which are connected in parallel. The LED drive current
per channel is set up by external resistor. Besides, by setting up SEL1/SEL2 pins, 6-channel of LED drive cur-
rent control circuit can be divided to 2-groups, and input signal controlling of EN1/EN2 pins allow ON/OFF
and dimming per group.
×1
and
×
1.5 automatically. The
FEATURES
I
Battery life extension by automatic charge pump
switch between
×
1 and
detection of the LED drive current
Controlling 1 to 6 lights of white LED connected
in parallel
Set up LED drive current value by external resistor
(5k
:5mA/ch, 15k
:15mA/ch, 20k
Dividing 6-channel to 2-groups by setting up
SEL1/SEL2 pins (L/L
=
6:0ch, L/H
H/L
=
4:2ch, H/H
=
3:3ch)
2-wire input controlling (1-wire input controlling
when SEL1/SEL2 pins are set to “LOW”)
ON/OFF and brightness control by input signal
controlling of EN1/EN2 pins
Supply voltage range
No-load current (I
OUT
Load current (I
OUT
=
120mA): 3.3 to 4.6V
Maximum output voltage: 4.2V (typ)
Maximum output current: 120mA (typ)
Quiescent current
Not-switching (
×
1 mode): 0.7mA (typ)
Switching (
×
1.5 mode): 2.0mA (typ)
Standby current (Power save mode): 0.01
Operating frequency (
×
1.5 mode): 750kHz (typ)
LED drive current accuracy (RSET
:20mA
±
3%
Input signal frequency for dimming (Duty
:150kHz (max)
Package:20-pin QFN
×
1.5 according to the
I
I
:20mA/ch)
I
=
5:1ch,
I
I
I
=
0mA): 2.7 to 4.6V
I
I
I
I
μ
A (typ)
I
I
=
20k
)
I
=
50
%
)
I
APPLICATIONS
I
Cellular phone
PDA
Portable games
Handy terminal
Digital still camera
Digital video camera
LCD back light
White LED driving
I
I
I
I
I
I
I
PINOUT
(Top view)
PACKAGE DIMENSIONS
(Unit: mm)
ORDERING INFORMATION
Device
Package
SM8131B00B
20-pin QFN
1
2 3
4
5
15 14 13 12 11
10
9
8
7
6
16
17
18
19
20
VREG
C2P
C2M
PGND
C1M
EN1
DIN6
DIN5
DIN4
GND
D
D
D
I
C
E
S
S
V
V
4.20 ± 0.20
4.00 ± 0.10
4
4
1
0.50
0.60 ± 0.10
0
1
0
+
0.22 ± 0.05
0.05
0.05 M
2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SM8132A | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:White LED Driver IC |
| SM8132AB | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:White LED Driver IC |
| SM8132AW | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:White LED Driver IC |
| SM8133B | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:White LED Driver IC |
| SM8133B_06 | 制造商:NPC 制造商全稱:Nippon Precision Circuits Inc 功能描述:White LED Driver IC |
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